Periclimenes colesi De Grave & Anker, 2009

Fransen, Charles H. J. M., 2023, The marine palaemonid shrimps (Crustacea, Deapoda, Caridea) of the Dutch Caribbean, Zootaxa 5387 (1), pp. 1-127 : 66-78

Periclimenes colesi De Grave & Anker, 2009

( Fig. 42–50 , video 10)

Periclimenes colesi — Horká et al., 2016: supplementary table S1 ( Curaçao).

Material examined. Curaçao: RMNH. CRUS.D.57055: 8 specimens; stn COA.01, Hilton Reef, 12°07′18.44″N 68°58′10.23″W, 31.x.2013, depth 31 m, scuba diving, in Callyspongia (Cladochalina) aculeata with Parazoanthus parasiticus (Duchassaing & Michelotti, 1860) , collected by C.H.J.M. Fransen (photo COA.01 028–035). RMNH. CRUS.D.58171: 18 specimens, stn COA.03, W Piscadera Baai, 12°07′21.90″N 68°58′13.54″W, 2.xi.2013, depth 10 m, scuba diving, in C. (C.) aculeata with P. parasiticus , collected by C.H.J.M. Fransen (photo COA.03 092– 103). Stn COA.05, Car Wrecks, 12°09′39.60″N 69°00′14.70″W, 3.xi.2013, scuba diving, in C. (C.) aculeata , not collected (photo COA.05 037). RMNH. CRUS.D.58173: 5 specimens; stn COA.05, Car Wrecks, 12°09′39.60″N 69°00′14.70″W, 3.xi.2013, depth 20 m, scuba diving, in sponge among Madracis auretenra Locke, Weil & Coates, 2007 (= Madracis mirabilis sensu Wells, 1973 ), collected by B. T. Reijnen. RMNH. CRUS.D.58174: 1 specimen; stn COA.10, Waterfabriek II, 12°06′37.00″N 68°57′16.30″W, 31.x.2013, depth 35 m, scuba diving, on brownish sponge with Parazoanthus sp. (collected), collected by C.H.J.M. Fransen. RMNH. CRUS.D.58175: 5 specimens; stn COA.19, Kleine Knip, 12°20′28.50″N 69°09′08.10″W, 2.xi.2013, depth 25 m, scuba diving, on C. (C.) aculeata with P. parasiticus (collected), collected by C.H.J.M. Fransen. RMNH. CRUS.D.58176: 4 specimens; stn COA.22, Grote Knip, 12°21′04.10″N 69°09′06.90″W, 6.xi.2013, depth 35 m, scuba diving, in Niphates digitalis , collected by C.H.J.M. Fransen (photo COA.22 189–199). RMNH. CRUS.D.58177: 5 specimens; stn COA.22, Grote Knip, 12°21′04.10″N 69°09′06.90″W, 6.xi.2013, depth 14 m, scuba diving, in C. (C.) aculeata , collected by B. T. Reijnen. RMNH. CRUS.D.58178: 11 specimens; stn CAR.04, Blue Bay, 12°08.063′N 68°59.138′W, 2.iv.2014, depth 21 m, scuba diving, on Desmapsamma anchorata (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58179: 1 specimen, stn CAR.05, Playa Kalki, 12°22.536′N 69°09.464′W, 1.iv.2014, depth 24 m, scuba diving, in Aplysina archeri (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58180: 19 specimens, stn CAR.05, Playa Kalki, 12°22.536′N 69°09.464′W, 1.iv.2014, depth 24 m, scuba diving, on blue branched sponge, collected by C. Rauch. RMNH. CRUS.D.58181: 4 specimens, CAR.06, Superior Producer, 12°06.354′N 68°56.572′W, 25.iv.2014, depth 23 m, scuba diving, on C. (C.) aculeata , (id. R.W.M. van Soest) collected by C. Rauch. RMNH. CRUS. D.58182: 1 specimen, CAR.06, Superior Producer, 12°06.354′N 68°56.572′W, 25.iv.2014, depth 20 m, scuba diving, on A. archeri (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58183: ca. 15 specimens, CAR.06, Superior Producer, 12°06.354′N 68°56.572′W, 25.iv.2014, depth 22 m, scuba diving, on Niphates erecta (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58184: 1 specimen, CAR.06, Superior Producer, 12°06.354′N 68°56.572′W, 25.iv.2014, depth 17 m, scuba diving, on C. (C.) plicifera (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58185: 12 specimens, stn CAR.11, Playa Manzalina, 12°14.713′N 69°06.314′W, 9.iv.2014, depth 10 m, scuba diving, on C. (C.) aculeata (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS. D.58186: 7 specimens, stn CAR.11, Playa Manzalina, 12°14.713′N 69°06.314′W, 9.iv.2014, depth 13 m, scuba diving, on N. erecta (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58187: 2 specimens, stn CAR.12, Caracasbaai, 12°04.588′N 68°51.817′W, 10.iv.2014, depth unknown, scuba diving, on N. erecta ,(id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.581883 specimens, stn CAR.12, Caracasbaai, 12°04.588′N 68°51.817′W, 10.iv.2014, depth unknown, scuba diving, on N. erecta (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58189: ca. 10 specimens; stn CAR.13, Jan Thiel, 12°04.584′N 68°52.796′W, 10.iv.2014, depth 17 m, scuba diving, on N. erecta (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58190: 2 specimens; stn CAR.13, Jan Thiel, 12°04.584′N 68°52.796′W, 10.iv.2014, depth 24 m, scuba diving, on Aplysina cauliformis (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58191: 3 specimens; stn CAR.14, Vaersenbaai, 12°09.678′N 68°00.237′W, 11.iv.2014, depth 24 m, scuba diving, on D. anchorata (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58192: 15 specimens, stn CAR.14, Vaersenbaai, 12°09.678′N 68°00.237′W, 11.iv.2014, depth unknown, scuba diving, on C. (C.) aculeata (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58193: 7 specimens, stn CAR.17, Habitat Curacao, 12°11.877′N 69°04.751′W, 16.iv.2014, depth unknown, scuba diving, on C. (C.) aculeata (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58194: 3 specimens, stn CAR.18, Daaibaai, 12°12.710′N 69°05.087′W, 17.iv.2014, depth 10 m, scuba diving, on C. (C.) aculeata (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58195: 4 specimens, stn CAR.18, Daaibaai, 12°12.710′N 69°05.087′W, 17.iv.2014, depth unknown, scuba diving, on Niphates erecta Duchassaing & Michelotti, 1864 (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58196: 1 specimen, stn CAR.18, Daaibaai, 12°12.710′N 69°05.087′W, 17.iv.2014, depth unknown, scuba diving, on A. archeri (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58197: 2 specimens; stn CAR.18, Daaibaai, 12°12.710′N 69°05.087′W, 17.iv.2014, depth 10 m, scuba diving, on A. cauliformis (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58198: 10 specimens, Boei 1, 18.iv.2014, depth 20 m, scuba diving, on C. (C.) aculeata (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58199: 1 specimen, Boei 1, 18.iv.2014, depth 26 m, scuba diving, on N. erecta (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58200: 2 specimens, Redio City, 21.iv.2014, depth unknwn, scuba diving, on N. erecta , collected by C. Rauch. RMNH. CRUS.D.58201: 1 specimen, Redio City, 21.iv.2014, depth unknown, scuba diving, on N. erecta (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58202: 1 specimen, CAR.22, Playa Largu, 12°14.118′N 69°05.907′W, 21.iv.2014, depth 30 m, scuba diving, on N. erecta (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58203: 1 specimen, CAR.22, Playa Largu, 12°14.118′N 69°05.907′W, 21.iv.2014, depth 13 m, scuba diving, on A. lacunosa (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58204: 4 specimens, CAR.23, Boka pos spano, 12°16.700′N 69°08.591′W, 24.iv.2014, depth 12 m, scuba diving, on N. erecta (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58205: 4 specimens: CAR.23, Boka pos spano, 12°16.700′N 69°08.591′W, 24.iv.2014, depth 12 m, scuba diving, on A. cauliformis (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58206: 1 specimen, CAR.24, Diver’s leap, 12°04.439′N 68°52.714′W, 21.iv.2014, depth unknown, scuba diving, on A. lacunosa (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58207: 13 specimens, CAR.25, Playa Forti, 12°21.976′N 69°09.220′W, 23.iv.2014, depth 21 m, scuba diving, on C. (C.) aculeata (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58208: 1 ovigerous female, 1 juvenile, CAR.26, Grote Knip, 12°21.087′N 69°09.095′W, 23.iv.2014, depth 22 m, scuba diving, on C. (C.) aculeata (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58209: 1 specimen, CAR.26, Grote Knip, 12°21.087′N 69°09.095′W, 23.iv.2014, depth 22 m, scuba diving, on N. erecta (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58210: 4 specimens; CAR.26, Grote Knip, 12°21.087′N 69°09.095′W, 23.iv.2014, depth 10 m, scuba diving, on C. (C.) plicifera (Lamarck, 1814) (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58211: 1 specimen, CAR.27, Tugboat, 12°04.152′N 68°51.708′W, 24.iv.2014, depth unknown, scuba diving, on C. (C.) aculeata (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58212: 1 specimen, CAR.29, Fuikbaai, 12°02.855′N 68°49.838′W, 25.iv.2014, depth 28 m, on pink branched sponge, collected by C. Rauch. RMNH. CRUS.D.58213: 1 specimen, CAR.29, Fuikbaai, 12°02.855′N 68°49.838′W, 25.iv.2014, depth 24 m, scuba diving, on C. (C.) aculeata (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58214: 7 specimens; CAR.29, Fuikbaai, 12°02.855′N 68°49.838′W, 25.iv.2014, depth 23 m, scuba diving, on A. lacunosa (id. R.W.M. van Soest), collected by C. Rauch. RMNH. CRUS.D.58215: 2 males, pocl. 0.9 and 1.8 mm, CF10B-1, St Michielsbaai, 10.vi.2017, depth 15 m, scuba diving, on yellow tube sponge, A. fistularis (id. Jaaziel García-Hernández), collected by C.H.J.M. Fransen. RMNH. CRUS.D.58216: 14 specimens, CF12B-2, Substation, 12.vi.2017, depth 15 m, scuba diving, on N. digitalis , collected by C.H.J.M. Fransen. RMNH. CRUS.D.58217: 2 ovigerous females pocl. 1.6 mm and 2.1 mm, 1 non ovigerous female pocl. 1.5 mm, 4 males pocl. 1.1–1.6 mm, 7 specimens, CF14A-4, Playa Kalki, 14.vi.2017, depth 15 m, scuba diving, in C. (C.) aculeata , collected by C.H.J.M. Fransen (video 10). Stn CF16C, Hilton Reef, 16.vi.2017, depth unknown, scuba diving, night dive, on C. (C.) aculeata, C.H.J.M. Fransen (video 10), not collected. Stn CF17A, Habitat, 17.vi.2017, depth unknown, scuba diving, on C. (C.) plicifera, C.H.J.M. Fransen (video 10), not collected. RMNH. CRUS.D.58218: 1 non ovigerous female, pocl. 1.5 mm, CF19B-1, Cas Abou, 19.vi.2017, depth 25 m, scuba diving, on Clathria (Thalysias) curacaoensis Arndt, 1927 , collected by C.H.J.M. Fransen (video10). RMNH. CRUS. D.58219: 1 ovigerous female, pocl. 1.7 mm CF19B-2, Cas Abou, 19.vi.1017, depth 20 m, scuba diving, on Mycetophyllia lamarckiana Milne Edwards & Haime, 1848 , collected by C.H.J.M. Fransen. RMNH. CRUS.D.58220: 1 ovigerous female pocl. 1.7 mm, 1 non ovigerous female pocl. 1.3 mm, 1 male pocl. 1.2 mm, CF20A-1, Playa Lagun, 20.vi.2017, depth 30 m, scuba diving, on Xestospongia sp. , collected by C.H.J.M. Fransen (video 10). Stn. CF20A, Playa Lagun, 20.vi.2017, depth 30 m, scuba diving, on C. (C.) plicifera, C.H.J.M. Fransen (video 10). RMNH. CRUS.D.58221: 1 juvenile, pocl. 1.2 mm CF20B-1, Playa Jeremy, 20.vi.2017, depth 30 m, on Porites astreoides Lamarck, 1816 , collected by Jaaziel García Hernández. OUMNH. ZC. 2019-06-20: 41 specimens including ovigerous females, pocl. 1.2–2.2 mm, Sun Reef, 12.1392ºN 68.9981ºW, depth 20 m, 16.ii.2015, from Agelas sp. , leg. P. Wirtz & K. Wittman (sample 7). Bonaire: stn BON.01 Punt Vierkant (Delfin’s Beach Resort), 12°06.908′N 068°17.659′W, 22.x.2019, depth unknown, scuba diving, on C. (C.) plicifera, C.H.J.M. Fransen (video 10), not collected. RMNH. CRUS.D.58328: 6 specimens, stn BON.07, Sweet Dreams, 12°02.137′N 068°15.722′W, 25.x.2019, depth 25 m, scuba diving, in C. (C.) plicifera , collected by C.H.J.M. Fransen (fcn. BON.07-3) (video 10). Stn BON.15, Red Beryl, 12°02.819′N 068°16.073′W, 28.x.2019, depth 25 m, on Agelas tubulata Lehnert & Van Soest, 1996 , C.H.J.M. Fransen (photo). RMNH. CRUS.D.58222: 4 specimens, stn BON.18, Red Slave, 12°01.605′N, 068°15.079′W, 28.x.2019, depth 10 m, scuba diving, on C. (C.) aculeata , collected by C.H.J.M. Fransen. Stn BON.23, Playa Funchi, 12°16.957′N 068°24.822′W, 1.xi.2019, depth 10 m, scuba diving, on C. (C.) aculeata, C.H.J.M. Fransen (video 10), not collected. Stn BON.29, Front Porch, 12°09.904′N 068°17.194′W, 4.xi.2019, depth unknown, scuba diving, on C. (C.) aculeata, C.H.J.M. Fransen (video 10), not collected. Stn BON.30, Invisibles, 12°04.646′N 068°16.800′W, 4.xi.2019, depth 14 m, scuba diving, on Iotrochota birotulata (Higgin, 1877) (video 10), and on C. (C.) aculeata, C.H.J.M. Fransen , not collected. RMNH. CRUS.D.57900: 1 ovigerous pocl. 1.8 mm, 1 male pocl. 1.1 mm, stn BON.31, Tolo, 12°12.923′N 068°20.218′W, 5.xi.2019, depth 18 m, scuba diving, on Madracis pharensis (Heller, 1868) , collected by C.H.J.M. Fransen (video 10). RMNH. CRUS.D.58223: 1 specimen, stn BON.33, Invisibles, 12°04.646′N 068°16.800′W, 6.xi.2019, depth 30 m, scuba diving, on Iotrochota birotulata (Higgin, 1877) , collected by C.H.J.M. Fransen. RMNH. CRUS.D.57906: 1 specimen pocl. 1.0 mm, stn BON.34, Boka Onima, 12°15.187′N 068°18.663′W, 6.xi.2019, depth 20 m, scuba diving, on M. pharensis , collected by C.H.J.M. Fransen. Stn BON.45, Klein Bonaire: Carl’s Hill, 12°09.886′N 068°19.379′W, 8.xi.2019, depth 32 m, scuba diving, on I. birotulata, C.H.J.M. Fransen (video 10), not collected. Stn BON.45, Klein Bonaire: Carl’s Hill, 12°09.886′N 068°19.379′W, 8.xi.2019, depth 20 m, scuba diving, M. pharensis, C.H.J.M. Fransen (video 10), not collected. Comparative material: RMNH. CRUS.D.51755: 9 paratype specimens, pocl. 1.0– 1.8 mm, Black Coral Wall dive site, Utila, Bay Islands, Honduras, 16°05.027′N 86°54.944′W, 4.viii.2007, 15 m depth, inside osculum of C. (C.) aculeata , leg. S. De Grave & A. Anker.

Description (based on material of RMNH.CRUS.D.57900 on M. pharensis . Small sized, rather slender shrimp, with slender pereiopods ( Fig. 42A ). Carapace smooth. Rostrum ( Fig. 42A–E ) well developed, reaching to end of basal segment of antennular peduncle; lamina moderately deep, lateral carina indistinct, situated near to proximally slightly convex ventral margin with 1 very small subdistal tooth; convex posterior part of ventral margin with single row of plumose setae; dorsal margin convex, elevated, strongly compressed, with 6–7 subequal equally spaced teeth, posteriormost teeth situated at level of posterior margin of orbit or just posterior; few plumose setae just in front of dorsal teeth. Supra-orbital spines absent. Inferior orbital angle well developed, produced, rounded in lateral view. Antennal spine small, marginal, situated below inferior orbital angle. Hepatic spine distinctly larger than antennal spine, situated well behind level of posterior orbital margin and slightly below level of antennal spine. Anterolateral angle of carapace ( Fig. 42B ) bluntly rounded, not produced.

Pleon ( Fig. 42A ) smooth. Third pleonite not produced posterodorsally. Pleura all broadly rounded. Sixth pleonite twice as long as fifth, posteroventral angle feebly produced, rounded, posterolateral angle acute.

Telson ( Fig. 43A, B ) 0.7 times as long as sixth pleonite and 2.7 times longer than anterior width; lateral margins converge posteriorly; two pairs of small sized submarginal dorsal cuspidate setae present at 0.50 and 0.73 of telson length; posterior margin rounded, without median acute process, 0.33 of anterior width, with three pairs of spiniform setae; lateral spiniform setae short, as long as dorsal cuspidate setae; intermediate spiniform setae well developed, about 0.16 of telson length, 1.8 times length of submedian spiniform setae.

Eyes ( Fig. 42B, C ) well developed; cornea globular, with distinct accessory pigment spot dorsolaterally; eyestalks almost twice as long as proximal width, slightly swollen proximally.

Antennular peduncle ( Fig. 42B, C ) exceeding tip of rostrum by distal two segments; proximal segment long, slender, 3.2 times longer than wide; lateral margin straight, anterolateral margin produced, with distolateral tooth and row of setae; medial ventral margin with tooth; stylocerite slender, acute, reaching to middle of segment; statocyst containing granular statolith; intermediate and distal segments short, together equal to 0.42 of proximal segment length; upper outer flagellum biramous, with first 6–7 segments fused; aesthetascs present on distal 4 segments of fused part and short free ramus; shorter free ramus two-segmented, longer rami with 6 segments; lower inner flagellum slender, slightly longer than upper flagellum.

Antennal basicerite ( Fig. 42B ) with lateral tooth; ischiocerite and merocerite normal; carpocerite slender, reaching 0.4 of length of scaphocerite; scaphocerite long, rather slender, with lamella slightly overreaching distal margin of antennular peduncle; lateral border straight, ending in acute large distolateral tooth; lamella extending beyond distolateral tooth, feebly angulated distomedially, about 3 times longer than broad, with greatest width at about half of its length.

Epistome and labrum normal.

Second thoracic sternite unarmed. Third thoracic sternites with median rounded shallow process. Fourth thoracic sternite without medial process, with shallow lateral carinae posteromedial of first pereiopods.

Fifth thoracic sternite with lateral plates posteromedial of second pereiopods.

Sixth to eighth thoracic sternites unarmed.

Mandible ( Fig. 43C ) with cylindrical molar process bearing a few brushes of setae distally; incisor process slender, with four well developed teeth distally, of which lateralmost slightly enlarged; without palp.

Maxillula ( Fig. 43D ) with upper lacinia subrectangular with row of few serrulate spines and setae medially; lower lacinia slenderer, with few serrulate setae distally; palp bilobed, medial lobe with single short recurved simple seta.

Maxilla ( Fig. 43E ) with short tapering non-setose palp with few plumose setae laterally; basal endite well developed, distinctly bilobed, with short, minutely serrulate setae medially; coxal endite obsolete, median margin convex, without setae; scaphognathite normal, widest centrally, about 2.7 times longer than broad, with marginal plumose setae.

First maxilliped ( Fig. 43F ) with short, slender, tapering palp with one simple subdistal seta; basal region broad, not distinctly separated from the coxal region; median margin provided with setulose and slender simple setae; caridean lobe distinct, with coarsely setulose plumose marginal setae; flagellum of exopod well developed with 4 long plumose distal setae and few short subdistal setae; epipod bilobed.

Second maxilliped ( Fig. 44A ) with dactylar segment narrow, 3.3 times longer than wide, straight medially, densely fringed with numerous coarsely serrulate, spiniform, and long curled finely serrulate setae medially; propodal segment longer than dactylar segment, almost twice as long as wide, distomedial margin rounded, with few long serrulate and simple setae; carpus short, unarmed; meral segment short, not excavate; ischium excavate, fused to basis; basis with long slender exopod exceeding length of endopod, with 4 long plumose setae distally and few short setae subdistally; coxa slightly produced medially, with few small simple setae medially with rounded small oblong epipod laterally.

Third maxilliped ( Fig. 44B ) slender; terminal segment 3.6 times longer than proximal width, slightly shorter than length of penultimate segment, with few serrulate and simple setae medially; penultimate segment slender, 4.7 times longer than wide; meral segment as long as penultimate segment, with distinct articulating distolateral cuspidate seta; ischial segment slightly shorter than meral segment; both meral and ischal segments with long setae along medial margin; basal segment short, medial margin convex with few long setae; exopod reaching mid length of meral segment, with 4 distal plumose setae; coxa slightly produced medially, with rounded lateral plate, without arthrobranch.

First pereiopod ( Fig. 44C ) slender, almost reaching distal margin of scaphocerite; chela with palm subcylindrical, straight, 2.0 times longer than wide; fingers almost as long as palm, straight not subspatulate, with brushes of few setae in distal part, cutting edges entire, tips of fingers hooked; carpo-propodal brush well developed; carpus 1.2 times length of chela, 5.5 times longer than distal width; merus as long as carpus, about twice length of ischium; ischium with few long simple setae medially; basis short, with few long simple setae medially; coxa with medial protuberance with few long simple setae.

Second pereiopods, subequal in length, similar. Major second pereiopod ( Fig. 45A ) extending beyond antennular peduncle with chela; chela with palm subcylindrical, straight; palm about 3.5 times as long as wide; fingers ( Fig. 45B ) 0.5 of palm length, slightly gaping centrally; dactylus about as wide as fixed finger, without dorsolateral longitudinal carina, with brushes of setae in distal part, unguis strongly hooked, cutting edge with one slightly recurved tooth proximally; fixed finger with tip strongly hooked, with one tooth in proximal half, just posterior of tooth on cutting edge of dactylus; carpus, merus and ischium unarmed, their length ratios of 1.0, 0.9, and 1.0 times length of palm; basis and coxa without special features. Minor second pereiopod ( Fig. 45C ), similar but more slender than major pereiopod; chela with fingers ( Fig. 45D, E ) 0.75 times as long as subcylindrical palm, similar as in major chela; carpus, merus and ischium unarmed, their length ratios of 1.8, 1.3, and 1.5 times length of palm; basis and coxa without special features.

Ambulatory pereiopods ( Fig. 46A, C, D ) slender, third, fourth and fifth similar in form, slightly increasing in length from third to fifth; dactylus ( Fig. 46B, D, F ) slender, uniformly tapering, about 0.25 of propodus length, 5.6 times as long as proximal width, with slender unguis almost as long as corpus, with short accessory tooth, 0.3 times of unguis length; propodus about 15 times longer than wide, with pair of distoventral serrulate spiniform setae and one smaller serrulate spiniform seta subdistally and plumose and simple setae distally on dorsal margin; carpus, merus and ischium 0.50, 1.0 and 0.50 of propodus length, unarmed; basis and coxa without special features; fifth pereiopod similar with two pairs of long serrulate spiniform setae in distroventral part of propodus.

Endopod of first pleopod in ovigerous female ( Fig. 47A ) short, 0.30 of length of exopod, with long plumose setae along distal half of median margin. Endopod of first pleopod in male ( Fig. 47B ) short, 0.41 times length of exopod, distally rounded, with 4 plumose setae along lateral margin and one plumose seta in proximal part of medial margin with two small short setae somewhat more anteriorly. Endopod of second pleopod in male ( Fig. 47C ), 0.78 times length of exopod. Appendix masculina almost as long as appendix interna, with four long setae (sub)distally.

Uropods ( Fig. 42A ) extending beyond tip of telson; protopodite unarmed laterally; exopod with lateral border almost straight, entire, 3.5 times longer than wide, slightly longer than endopod, terminating in a small tooth with small mobile spinulate seta medially ( Fig. 47D ).

About 30 eggs of ca. 0.5 mm in diameter present under abdomen. Size. Ovigerous female pocl. 1.75 mm. Colour. Colour pattern ( Fig. 50 , video 10) as described by De Grave & Anker (2009). Remarks. The specimens largely fit the description by De Grave & Anker (2009). Rostrum ( Figs. 42A–E , 48A– F ) distally upturned, short, not reaching distal margin of basal antennular segment; dorsal lamina well developed, with 4 to 8 teeth (number increases with size), posterior-most tooth postorbital or level with orbit; ventral margin convex with 0 to 2 (usually 1) subdistal shallow, small teeth. This differs from the type material from Honduras in which this tooth is absent ( De Grave & Anker 2009: figs. 3, 6–8). Basal segment of antennular peduncle with one distolateral tooth, no additional teeth on distal margin ( Fig. 42C ). Endite of maxilla bilobed ( Fig. 42E ). Third maxilliped ( Figs. 44B , 48G ) ischiomerus with single distolateral mobile spine, not present in type species; distomesial margin glabrous, not crenulated. Second pereiopods ( Figs. 45A, C ) subequal in size and shape, slender; fingers ( Figs. 45A, C , 48H ) 0.25–0.30 of chela length; cutting edge dactylus with tooth at 0.3–0.5 of length. In the present material, typically a distinct gape is present just distally of the proximal teeth on dactylus and fixed finger of the major second chela ( Figs. 45B , 48I, J , 49A, B ); the transition to the distal part of the cutting edge is broadly rounded; this feature is most pronounced in larger specimens (figs. Figs. 45B , 48I, J ) whereas less developed or absent in smaller specimens (49A, C); in the type series this gape was not observed ( Fig. 51E ; De Grave & Anker 2009: fig. 15). In the present material, the fingers of the minor second chela have a proximal tooth each in larger specimens, sometimes followed by a small gape ( Fig. 45D, E , 48B ) whereas these teeth and gape are absent in smaller specimens ( Fig. 48D ); teeth on the cutting edges of the minor second chelae nor a gape were observed in the type-series. The third and fourth pereiopods are of equal size; the propodi have one subdistal spine and a pair of distoventral spines on the flexor margin ( Fig. 46B, D ) whereas only a single distoventral spine is present in the type-series ( De Grave & Anker 2009: fig. 18); the dactylus ( Fig. 46A, C ) is slender, biunguiculate; unguis slightly more than half length corpus; accessory tooth triangular, 0.15–0.5 of length unguis. Telson with two pairs of dorsal spines, anterior pair situated at about mid-length, posterior pair at two-thirds of telson length; three pairs of apical spines; lateral pair shortest, as long as dorsal spines; intermediate pair longest; mesial pair plumose, half length of intermediate pair; the apical margin is rounded in the present material ( Fig. 43B ) whereas a medial acute process is present in the type-series ( Fig. 49F ; De Grave & Anker 2009: fig. 23).

A proximal tooth on the fixed finger of the major second pereiopod is not mentioned in the type description of P. colesi . By re-examining the paratypes of P. colesi , a small proximal tooth was found in one of the larger specimens (pocl. 1.5 mm).

Morphological and molecular differences (see below) between material found on Porifera and on Scleractinia in Curaçao and Bonaire have not been found, neither is there a difference noted between the colour patterns.

The differences in the dentition of the chelae and in the presence or absence of a median apical process on the posterior margin of the telson are constant between the Honduras and Curaçao / Bonaire populations. This might be a sign that cryptic species are involved. When molecular sequences of the Honduras populations come available, it might be possible to verify if cryptic species are indeed involved here. As morphological differences between the Honduras and Curaçao / Bonaire populations remain small and specimens from both localities were found on the same host ( C. (C.) aculeata ) they are for now regarded conspecific.

The most closely related species is Periclimenes sandyi De Grave, 2009 . This species was also found in association with sponges. As some variation in the dentition of the rostrum and that of the fingers of the second chela was observed in material from Curaçao, it was suggested that P. sandyi might be a junior synonym of P. colesi (see De Grave & Anker 2017). When checking the extensive series of material from both Curaçao and Bonaire, none of the specimens examined had two distinct teeth on both fingers of the chelipeds as described for P. sandyi ( De Grave 2009: fig. 3D), nor a crenulated distolateral margin of the ischiomerus of the third maxilliped ( De Grave 2009: fig. 2F) in this species. It is therefor concluded here that P. sandyi is a valid species distinct from P. colesi .

Ecology. Periclimenes colesi is known to live in association with sponges: C. (C.) aculeata ( De Grave & Anker 2009) ; Mycale (Arenochalina) laxissima (Duchassaing & Michelotti, 1864) , N. rosariensis , and N. erecta (see De Grave & Anker 2017). It is now recorded for the first time from Agelas tubulata Lehnert & van Soest, 1996 , A. archeri , A. cauliformis , A. fistularis , A. lacunosa , C. (C.) plicifera , D. anchorata , I. birotulata , and N. digitalis . The species is now recorded from stony corals, Madracis pharensis , Mycetophyllia lamarckiana , and Porites astreoides for the first time. This is also the first record of a member of the P. iridescens species complex associating with a stony coral.

Distribution. Periclimenes colesi is known from scattered locations in the tropical western Atlantic: Honduras ( De Grave & Anker 2009), Caribbean coast of Panama ( De Grave & Anker 2017), and Curaçao ( Horká et al. 2016); in depths between 1 and 15 m. The species is herein recorded for the first time from Bonaire.

Figures

FIGURE 42. Periclimenes colesi De Grave & Anker, 2009. RMNH.CRUS.D.57900: A–C, ovigerous female, pocl. 1.8 mm; D, male, pocl. 1.1 mm. RMNH.CRUS.D.57906: E, male, pocl. 1.0 mm. A, habitus, lateral; B, anterior appendages, lateral; C, anterior appendages, dorsal; D–E, rostrum, lateral. Scale bar: A=2.0 mm; B–E=1.0 mm.

FIGURE 43. Periclimenes colesi De Grave &Anker, 2009, RMNH.CRUS.D.57900, ovigerous female, pocl. 1.8 mm.A, telson, dorsal; B, idem, tip, dorsal; C, left mandible; D, left maxillula; E, left maxilla; F, left first maxilliped. Scale bar: A=0.5 mm; B=0.125 mm; C–F=0.25 mm.

FIGURE 44. Periclimenes colesi De Grave & Anker, 2009, RMNH.CRUS.D.57900, ovigerous female, pocl. 1.8 mm. A, left second maxilliped; B, left third maxilliped; C, left first pereiopod. Scale bar: A=0.25 mm; B, C=0.5 mm.

FIGURE 45. Periclimenes colesi De Grave & Anker, 2009, RMNH.CRUS.D.57900, ovigerous female, pocl. 1.8 mm. A, left major second pereiopod, lateral view; B, idem, chela, medial view; C, right minor second pereiopod, lateral view; D, idem, chela; E, idem, medial view. Scale bar: A, C=1.25 mm; B, D, E=0.25 mm.

FIGURE 46. Periclimenes colesi De Grave & Anker, 2009, RMNH.CRUS.D.57900: A, B, male, pocl. 1.1 mm; C–F, ovigerous female, pocl. 1.8 mm. A, left third pereiopod, lateral view; B, idem, dactylus and distal part propodus; C, left fourth pereiopod, lateral view; D, idem, dactylus and distal part propodus; E, left fifth pereiopod, lateral view; F, idem, dactylus and distal part propodus. Scale bar: A=0.5 mm; B=0.125 mm; C, E=1.25 mm; D, F=0.25 mm.

FIGURE 47. Periclimenes colesi De Grave & Anker, 2009, RMNH.CRUS.D.57900: A, D, ovigerous female, pocl. 1.8 mm; B, C, male, pocl. 1.1 mm. A, B, first pleopod; B, second pleopod; D, uropod, exopod, distolateral part. Scale bar: A–C=0.25 mm; D=0.125 mm.

FIGURE 48. Periclimenes colesi De Grave & Anker, 2009. A, RMNH.CRUS.D.58217; B, E–J, RMNH.CRUS.D.58328; C, RMNH.CRUS.D.58221; D, RMNH.CRUS.D.58220. A, rostrum, ovigerous female, pocl. 1.5 mm; B, idem, male, pocl. 1.3 mm; C, idem, female, pocl. 1.2 mm; D, idem, ovigerous female, pocl. 1.8 mm; E, idem, ovigerous female, pocl. 1.6 mm; F, idem, male, pocl. 0.9 mm; G, third maxilliped, joint meral and carpal segments; H, right major second pereiopod; I, idem, chela, medial view; J, idem, lateral view. Scale bars: A–F=1.0 mm; G=0.125 mm; H=1.25 mm; I, J=0.25 mm.

FIGURE 49. Periclimenes colesi De Grave & Anker, 2009. A, B, RMNH.CRUS.D.58328, female, pocl. 13.5 mm; C, D, idem, juvenile pocl. 0.7 mm; E, F, RMNH.CRUS.D.51755, ovigerous female, pocl. 1.5 mm. A, C, E, right major second chela; B, D, left minor second chela; F, telson, tip. Scale bar: A–E=0.25 mm; F=0.125 mm.

FIGURE 50. Periclimenes colesi De Grave & Anker, 2009. A, B, stn COA.03, Curaçao, W Piscadera Baai, 12°07′21.90″N 68°58′13.54″W, 2.xi.2013, depth 10 m, in Callyspongia (Cladochalina) aculeata (Linnaeus, 1759)with Parazoanthus parasiticus (Duchassaing & Michelotti, 1860); C, stn COA.23, Curaçao, Grote Knip, 12°21′04.10″N 69°09′06.90″W, 6.xi.2013, depth 35 m, in Niphates digitalis (Lamarck, 1814); D, stn COA.01, Curaçao, Hilton Reef, 12°07′18.44″N 68°58′10.23″W, 31.x.2013, depth 31 m, in C. (C.) aculeata with P. parasiticus. (Photographs by C.H.J.M. Fransen.)

FIGURE 51. Periclimenes crinoidalis Chace, 1969, RMNH.CRUS.D.57892. A–D, F, G, ovigerous female, pocl. 2.4 mm; E, male, pocl. 1.5 mm. A, carapace and anterior appendages, lateral view; B, idem, dorsal view; C, abdomen, lateral view; D, E, rostrum, lateral view; F, telson, dorsal view; G, idem, distal part. Scale bars: A–C=2.0 mm; D, E=1.0 mm; F=0.5 mm; G=0.125 mm.