Harpilius inermis Miers, 1884: 291

de Gier, Werner & Fransen, Charles H. J. M., 2023, Polka-dotted treasures: Revising a clade of ascidian- and bivalve-associated shrimps (Caridea: Palaemonidae), Contributions to Zoology 92 (3), pp. 179-282 : 225-237

Harpilius inermis Miers, 1884: 291 , pl. 32 fig. B [Type locality: Port Molle, in the interior of a shell of a species of Pinna ]; Müller, 1887: 471.

Pontonia pinnae Ortmann, 1894: 16 , pl. 1 fig. 3; nec Lockington, 1878a [Type locality: Dares-Salaam, Chokirbank, in den Schalen einer Pinna -Art]

Anchistus inermis – Borradaile, 1898: 387 (listed); Lanchester, 1902: 565; Pearson, 1905: 77; Rathbun, 1914: 656; Borradaile, 1917:388 (listed); Tattersall, 1921 (listed); Hale, 1927: 57, fig. 52.

Pontonia custos – Borradaile, 1898: 388 (listed). Periclimenes aurantiacus – Borradaile, 1898: 382 (listed).

Marygrande mirabilis Pesta, 1911: 573 , figs. 1–5 (partim) [Type locality: Samoa]; Pesta, 1913: 88, figs. 31, 32; De Grave, 2001: 129–134, figs. 1–3. Periclimenes (Ensiger) aurantiacus – Borradaile, 1917: 376 (listed). Pontonia spinax Dawydoff, 1952: 136 . [nomen table 1, fig. 1; Gan et al., 2015: 3, fig. 1; Hosie et nudum] al., 2015: 283 (listed); Dobson et al., 2016: fig. 7, Anchistus custos – Holthuis, 1955: 62, fig. 34 suppl. inf. I; Anker & De Grave, 2016: 406, fig.

(listed); Holthuis, 1952: 105–109 (full synon- 73; Samuel et al., 2016: table 1; Ghory & Kazmi, ymy), figs. 43, 44 (specimen from Kera Island 2018: 23–26; Al-Kandari et al., 2020, 263, fig. 8; excluded (= Ensiger custoides (Bruce, 1977)) ; Chow et al., 2021: table A.1.

Johnson, 1961: 59; Johnson & Liang, 1966: Not Anchistus custos – Miyake & Fujino, 1968: 433–455, figs. 1–10; Jacquotte, 1963: 59–62; 415 (= Ensiger custoides (Bruce, 1977)) .

Hipeau-Jacquotte, 1967: 153–166; McNeill, Not Pontonia custos – Sharp, 1893: 119 (= 1968; Hipeau-Jacquotte, 1971: 194; Bruce, Pontonia pinnophylax (Otto, 1821)) .

1972a: 219 (listed); Hipeau-Jacquotte , 1972a: Material examined. INDONESIA: 1 male 287–294, figs. 1, 2a1; Hipeau-Jacquotte , 1973a: pocl. 4.03 mm ( RMNH. CRUS.D.41445), stn 96–116, figs. 1a1–f1, 2, 3a1–b1, 4a1–d1,5, 6a, RBE.01, Ambon Island , Ambon Bay , inner bay, 7a1–f1, 8a1–d1; Hipeau-Jacquotte, 1973b: 63-70; Hunut, basecamp, 28.xi.1990, depth 1-3 m, Hipeau-Jacquotte, 1974a: 367-382; Hipeau- snorkeling, in Pinna sp. , coll. H.L. Strack. – 1 Jacquotte, 1974b: 383-402; Hipeau-Jacquotte, ovigerous female pocl. 6.49 mm (photo M.S.S.

1974c: 403–408; Hipeau-Jacquotte, 1974d: Lavaleye 51/23-27). – 1 male pocl. 5.65 mm 359–386; Thomassin, 1974: 306; Bruce, 1975a: (photo M.S.S. Lavaleye 51/25-29) ( RMNH.

150, 160–162, fig. 7; Bruce, 1976a: 93; Bruce, CRUS.D.41446), stn RBE.01, Ambon Island, 1976d: 464; Bruce, 1976e: 447; Bruce, 1977a: Ambon Bay, inner Bay, Hunut, basecamp,

47; Bruce, 1977b: 174; Bruce, 1978b: 279; Bruce, 11.xii.1990, depth 10 m, SCUBA diving, in large 1979a: 231–232; Johnson, 1979: 31; Tirmizi & Pinna bicolor Gmelin , coll. C.H.J.M. Fransen. – Kazmi, 1982: 115–117; Bruce, 1982: 264–265, 1 male pocl. 3.83 mm, 1 ovigerous female pocl.

fig. 19; Bruce , 1983a: 44; Bruce , 1983c: 199 6.10 mm ( RMNH. CRUS.D.41447), stn RBE.35, (listed); Bruce & Svoboda, 1983: 36 (listed); Ambon Island, Ambon Bay , Martafons , Vine, 1986: 101 (listed); Bruce, 1989: 178; Bruce, 4.xii.1990, littoral collecting, from wreck, in 1990: 15, 18 (listed); Bruce, 1993: 56; Chace & Pinna sp. , coll. H.L. Strack. – 1 ovigerous female Bruce, 1993: 72 (listed); Müller, 1993: 8 (listed); pocl. 6.36 mm ( RMNH. CRUS.D.41448), stn Fransen, 1994a: 106, 108, 111, fig. 4; Britayev & RBE.35, Ambon Island, Ambon Bay, inner bay, Fachrutdinov, 1994: 126, figs. 3A–C, 4–5; Bruce Martafons, 4.xii.1990, depth 2–4 m, snorke-

& Coombes, 1995: 106; Bruce, 1996: 205; Davie, ling, from piles of lightbouy, in Pinna [or 1998: 96, unnumbered colour photo; Davie, Atrina ?], coll. J.C. den Hartog. – 1 male pocl.

2002: 305 (listed); De Grave, 1999: 129, fig. 3, pl. 3.18 mm ( RMNH. CRUS.D.41449), sta. 35, 1b–c; Li , 2000: 7, fig. 8 (listed); Li , 2001: 76; De Ambon Island, Ambon Bay , inner bay, Grave , 2001: 129–134, figs. 1-3; Hayashi, 2002: Martafons, 5.xii.1990, depth 1–3 m, snorkeling ,

21, fig. 433, 434e, f; Li & Liu, 2002: 271–272, fig. from piles of lightbouy, in oyster [or Atrina ?],

1; Li et al., 2004: 528; Li & Bruce, 2006: 625; coll. C.H.J.M. Fransen and J.C. den Hartog. – 2 Bruce, 2006: table 1 (listed); Hayashi, 2006: males pocl. 5.06, 5.26 mm ( RMNH.

115; Marin & Savinkin, 2007: table 2 (listed); CRUS.D.41450), Java, off Jakarta, Seribu

De Grave, 2007: 145 (listed); Li et al., 2007: Archipelago, Tikus Island, 23.vii.1978, depth

176, fig. 73 (listed); Li, 2008a: 235, fig. 2; De 1-2 m, in Pinna sp. , coll. Sikardi, don. PPPO. – 2 Grave & Fransen, 2011: 340 (listed); De Grave males pocl. 5.00, 6.29 mm, 3 ovigerous females

& Ashelby, 2011: table 1 (listed); Dobson et al., pocl. 8.44, 8.70, 9.61 mm ( RMNH.

2014: suppl. fig. 1, appendix 1; Kou et al., 2015: CRUS.D.41451Downloaded), Pulau from Seribu Brill.com Archipelago 06/24/2024 12:38,:05 AM via Open Access. This is an open access article distributed under the terms of the CC-BY 4.0 license. https://creativecommons.org/licenses/by/4.0/ 29.xi.1984, in P. bicolor , coll. Sapri, Don. PPPO. Island, NW-side, 5°57’17”S 106°50’27”E ,

– 1 male pocl. 5.32 mm, 1 ovigerous female 8.ix.2005, depth 5 m, SCUBA diving and snor- (damaged) ( RMNH. CRUS.D.41452), Java, off kelling, in A. ectinate , coll. C.H.J.M. Fransen. – Jakarta, Seribu Archipelago, Kongsi Island , 1 male pocl. 5.1 mm ( RMNH. CRUS.D.58077), 25.v.1972, intertidal, dead coral and sand, coll. stn SER.02, Java Sea, Kepulauan Seribu M.K. Moosa & Sitabatan, don. PPPO, fcn. CM (Thousand Islands), off Jakarta, Damar Besar

7. – 1 male pocl. 6.75 mm ( RMNH. Island, NW-side, 5°57’17”S 106°50’27”E, CRUS.D.41453), Java, off Jakarta, Seribu 8.ix.2005, depth 7 m, SCUBA diving and snor- Archipelago, Pari Island, 27.i.1973, in Pinna sp. , kelling, in A. ectinate , coll. C.H.J.M. Fransen. – coll. Sukardi, don. PPPO. – 1 male pocl. 1 ovigerous female pocl. 5.3 mm, 1 male pocl.

5.00 mm ( RMNH. CRUS.D.41454) Ambon 3.7 mm ( RMNH. CRUS.D.58078), stn SER.02B, Island, Ambon Bay, Tantoci, 3.vi.1975, coll. Java Sea, Kepulauan Seribu (Thousand M.K. Moosa, A.H. Banner & D.M. Banner, don. Islands), off Jakarta, Damar Besar Island , PPPO, fcn. CM 195 . – 4 males pocl. 5.58, 5.84, NW-side, 5°57’17”S 106°50’27”E, 8.ix.2005, 6.10, 6.23 mm, 3 ovigerous females pocl. 7.27, depth 2 m, SCUBA diving and snorkelling, in P.

7.27, 7.33 mm ( RMNH. CRUS.D.41455), near bicolor , coll. J. Goud. – 1 ovigerous female pocl.

east coast of Tegal Island, near Sunda Island, 4.3 mm ( RMNH. CRUS.D.58079), stn SER.03,

in Pinna sp. , 16.i.1983, coll. Indra & Sukardi, Java Sea, Kepulauan Seribu (Thousand don. PPPO. – 1 ovigerous female pocl. 5.84 mm Islands), off Jakarta, Damar Kecil Island, ( ZMA. CRUS.D.101.612), Siboga Expedition stn NW-side, 5°59’00”S 106°50’43”E, 8.ix.2005, 127, Sangihe Group, Siau Island , anchorage off depth unknown, SCUBA diving and snorkel- Sawan, 18/ 19.vii.1899, depth 27 m (publ. ling, in P. bicolor , coll. J. Goud. – 3 ovigerous Holthuis, 1952: 106). – 1 male pocl. 6.17 mm, 1 females pocl. 5.0, 5.7 and 6.4 mm, 3 males female pocl. 11.04 mm, 1 ovigerous female pocl. pocl. 4.5, 4.7 and 5.4 mm ( RMNH.

7.14 mm ( ZMA. CRUS.D.101.613), Lesser Sunda CRUS.D.58080), stn SER.07, Java Sea, Islands, 18.xii.1909, leg. H.J.M. Laurense (publ. Kepulauan Seribu (Thousand Islands), off Holthuis, 1952: 106). – 1 non ovigerous female Jakarta, Bidadari Island , NW-side, 6°01’55”S pocl. 3.5 mm ( RMNH. CRUS.D.58075), stn 106°44’47”E, 9.ix.2005, depth 2–3 m, SCUBA SER.01, Java Sea, Kepulauan Seribu (Thousand diving and snorkelling, in P. bicolor , coll.

Islands), off Jakarta, Onrust Island, NW-side, C.H.J.M. Fransen. – 1 ovigerous female pocl.

6°02’01”S 106°43’58”E, 7.ix.2005, depth 1–2 m, 6.8 mm, 1 male pocl. 4.4 mm ( RMNH.

SCUBA diving and snorkeling, in P. bicolor, CRUS.D. 58081), stn SER.08, Java Sea, coll. P.G. Rachello Dolmen. – 6 males pocl. 5.1, Kepulauan Seribu ( Thousand Islands ), off 5.3, 5.7, 5.9, 6.5 and 6.5 mm, 6 ovigerous Jakarta, Ayer Besar Island , NW-side, 6°00’06”S females7.0, 7.5, 7.7,8.1, 8.7 and 8.8 mm ( RMNH. 106°46’48”E, 10.ix.2005, depth 3 m, SCUBA div- CRUS.D.57963; GenBank OQ 603092 ( COI) & ing and snorkelling, in P. bicolor , coll. C.H.J.M.

OQ600399 (16S)), stn SER.01, Java Sea, Fransen. – 1 ovigerous female pocl. 6.2 mm, 1 Kepulauan Seribu (Thousand Islands), male pocl. 5.2 mm ( RMNH. CRUS.D.58082), stn 6°02’01”S 106°43’58”E, 7.ix.2005, depth 1–2 m, SER.10, Java Sea, Kepulauan Seribu (Thousand SCUBA diving and snorkeling, in in Atrina ect- Islands), off Jakarta, Kelor Island, NW-side, inate (L.), coll. C.H.J.M. Fransen. – 1 ovigerous 6°01’31”S 106°44’39”E, 20.ix.2005, depth 2–3 m, female pocl. 6.4 mm ( RMNH. CRUS.D.58076), SCUBA diving and snorkelling, in P. bicolor , stn SER.02, Java Sea, Kepulauan Seribu coll. C.H.J.M. Fransen. – 1 ovigerous female (Thousand Islands), off Jakarta, Damar Besar pocl. 6.9 mm, 1 male pocl Downloaded from Brill.com 06/24/2024. 5.1 mm 12:38:05 AM via Open Access. This is an open access article distributed under the terms of the CC-BY 4.0 license. https://creativecommons.org/licenses/by/4.0/ ( RMNH. CRUS.D.58083), stn SER.10, Java Sea, 8 m, SCUBA diving, in Atrina vexillum (Born) Kepulauan Seribu (Thousand Islands), off (Ø 35 cm), coll. B.W. Hoeksema. – 1 male, pocl.

Jakarta, Kelor Island , NW-side, 6°01’31”S 5.6 mm, 1 female pocl. 6.9 mm ( RMNH.

106°44’39”E, 20.ix.2005, depth 2–3 m, SCUBA CRUS.D.47464),stn MAL.01, Moluccas,Ambon, diving and snorkelling, in P. bicolor , coll. B.W. Inner bay , N coast near laboratory Poka, Hoeksema. – 1 ovigerous female pocl. 6.8 mm , 03°38’S 128°11’E, 1-4.xi.1996, depth 1–2 m, snor-

1 male pocl. 4.7 mm ( RMNH. CRUS.D.58084), keling, muddy sublittoral near rocky shore, in

stn SER.10, Java Sea, Kepulauan Seribu P. bicolor , coll. C.H.J.M. Fransen. – 3 ovigerous (Thousand Islands), off Jakarta, Kelor Island , females pocl. 7.9, 7.8 and 7.3 mm, 2 males pocl .

NW-side, 6°01’31”S 106°44’39”E, 20.ix.2005, 6.0 and 7.0 mm ( RMNH. CRUS.D.42649), depth 2–3 m, SCUBA diving and snorkelling, in Padando Gr., Konori, Mios Woendi, New P. bicolor , coll. P.G. Rachello Dolmen. – 1 ovi- Guinea, in Pinna sp. , ex. Natural Science gerous female pocl. 7.7 mm, 1 male pocl. Foundation, no. 464 and no. 00112. – 1 speci-

5.8 mm ( RMNH. CRUS.D.58085), stn SER.10, men,total length 24 mm ( ZMA. CRUS.D.101612),

Java Sea, Kepulauan Seribu ( Thousand Anchorage off Sawan , Siau Islands , 18.vii.1899, Islands), off Jakarta, Kelor Island , NW-side, Siboga Expedition. – 1 ovigerous female total 6°01’31”S 106°44’39”E, 20.ix.2005, depth 1-2 m, length 28 mm, 1 specimen, total length 27 mm SCUBA diving and snorkelling, in P. bicolor , ( ZMA. CRUS.D.101613), Tual Anchorage, Kei

coll. R. Moolenbeek. – 1 ovigerous female pocl. Islands, 12.xii.1899, Siboga Expedition.

8.5 mm, 1 male pocl. 5.5 mm ( RMNH. MALAYSIA: 2 males pocl. 4.74, 5.00 mm, 1 CRUS.D.52028), stn SER.13, Pulau Seribu female pocl. 5.00 mm, 1 ovigerous female pocl .

Archipelago, Lancang, 5°55’37”S 106°35’29”E, 5.32 mm ( RMNH. CRUS.D.41456), Lankawi, 12.ix.2005, depth 12 m, in P. bicolor, Pulau Pantai [= beach] Kok, 22.ix.1991, littoral col- Seribu. – 1 ovigerous female pocl. 3.9 mm, 1 lecting, depth 0.1–0.2 m, each pair in Pinna male pocl. 3.6 mm ( RMNH. CRUS.D.58086), sp., in one Pinna together with pinnotherid

stn SER.14, Java Sea, Kepulauan Seribu crab, coll. H.L. Strack. SINGAPORE: 1 female ( Thousand Islands ), off Jakarta , Bokor Island, pocl. 8.44 mm ( RMNH. CRUS.D.41288), near NW-side, 5°56’35”S 106°37’38”E, 12.ix.2005, Sentosa Island, - vi.1983, tidal zone, in Pinna sp.

depth 10 m, SCUBA diving and snorkelling, in (Ø 15cm), coll. P.K.L. Ng. TAIWAN: 1 ovigerous P. bicolor , coll. P.G. Rachello Dolmen. – few female pocl. 9.09 mm ( RMNH. CRUS.D.4162), S specimens ( RMNH. CRUS.D.58087), stn Taiwan, Takao, 15.ix.1907, in Pinna sp. , coll. H.

SER.20, Java Sea, Kepulauan Seribu (Thousand Sauter. JAPAN: 1 male pocl. 4.1 mm, 1 female Islands), off Jakarta, Sepa Island , W-side, pocl. 5.4 mm ( RMNH. CRUS.D. 56147) , Ryukyu 5°34’39”S 106°34’48”E, 14.ix.2005, unknown Islands, Okinawa, Yagai Island , 19.ix.2013, depth , SCUBA diving from jetty (night), in P. intertidal, in Pinna sp. , coll. Yoshida, Ryuta.

bicolor , coll. C.H.J.M. Fransen. – few speci- PERSIAN GULF: 2 males pocl. 6.10, 6.23 mm, 2 mens ( RMNH. CRUS.D.58058), stn SER . 20, Java ovigerous females pocl. 8.05, 8.83 mm ( RMNH.

Sea, Kepulauan Seribu ( Thousand Islands ), off CRUS.D.16550), off Zeel Island , near stn 2, Jakarta, Sepa Island , W-side, 5°34’39”S 26.ix.1956, coll. C.E. Dawson. – 1 male pocl .

106°34’48”E, 14.ix.2005, unknown depth, 5.4 mm ( RMNH. CRUS.D.48723), Oman, SCUBA diving from jetty (night), in P. bicolor Masicoh, C 2, no more data, don. MNHN, Paris

coll. C.H.J.M. Fransen. – 1 male pocl. 6.5 mm, 1 through A. Anker, 2000. MADAGASCAR: 1 ovigerous female pocl. 8.6 mm ( RMNH. male pocl. 4.87 mm ( RMNH. CRUS.D.16546), CRUS.D.46642), SW Sulawesi, Spermonde Esimipoika Downloaded Bay , on gills from Brill of Pinna .com 06sp /24., /2024 coll.12G:38.:05 AM Archipelago, Gusung, NW side, 7.x.1994 via,Open depth Access Petit. This, don is an. Zool open. access Staatssammlung article distributed München under. – the1 terms of the CC-BY 4.0 license. https://creativecommons.org/licenses/by/4.0/ male pocl. 4.74 mm ( RMNH. CRUS.D.16547), Colour (fig. 20D). Specimens are trans- Normandia, don. Zool. Staatssammlung lucent with numerous small red and white München. – 1 male pocl. 6.88 mm, 1 female chromatophores all over the body, giving it pocl. 7.79 mm ( RMNH. CRUS.D.16548), province an orange appearance. The cornea is strongly

of Tuléar, Ankalibé, 1906, coll. F. Geay, don. reflecting, colouring silver.

Zool. Staatssammlung München. – 1 ovigerous Hosts. Recorded from Pinnidae : Atrina female pocl. 9.09 mm ( RMNH. CRUS.D.16549), vexillum (Born, 1778) (Forskål, 1775 (as Pinna province of Tuléar, 1921, coll. G. Petit, don. Zool. nigras ); Kemp, 1922 (as Pinna vexillum Staatssammlung München. UNKNOWN Born, 1778 and Pinna nigra Chemnitz, 1785 ), LOCALITY: 1 ovigerous female pocl. 8.05 mm 1925 (as P. nigra ); Jacquotte, 1963; Hipeau- ( RMNH. CRUS.D.4163), in Pinna sp. , coll. M.J. Jacquotte, 1967, 1973a, 1973b, 1974b; Britayev Landauer (publ. Holthuis, 1952: 106). & Fachrutdinov, 1994; Hayashi, 2006 (also as Diagnosis. Rostrum broad proximally, P. nigra ); Li, 2008a); Pinna atropurpurea G. B.

compressed distally, oblong triangular in dor- Sowerby I, 1825 (Johnson & Liang, 1966; Bruce, sal view, distally rounded, bent downwards, 1979a; Hayashi, 2002, 2006; Anker & De Grave, reaching distal end of ultimate segment of 2016); Pinna bicolor Gmelin, 1791 (Kemp, 1922; antennular peduncle, without teeth. Small Jacquotte, 1963; Hipeau-Jacquotte, 1967, 1973b, antennal spine present. Ventral orbital angle 1974b; Bruce, 1976b, 1976c; 1976d, 1976e, 1978b, produced. Antero-lateral angel of carapace 1993; Britayev & Fachrutdinov, 1994; Bruce & rounded, slightly produced. Sixth abdomi- Coombes, 1995; De Grave, 1999; Hayashi, 2002, nal segment posterior ventral angle rounded. 2006; Li, 2008a; Al-Kandari et al., 2020); Pinna Telson with minute dorsal spines at 0.60 deltodes Menke, 1843 (Bruce & Coombes, and 0.82 of telson length. Basal segment of 1995; Hayashi, 2006 as ‘ Pinna deltoides ’); antennular peduncle with one distolateral Pinna dolabrata Lamarck, 1819 (Hale, 1927; tooth. Scaphocerite with convex lateral mar- Hayashi, 2006); Pinna madida Reeve, 1858 gin; shallow slit between distolateral tooth (Hedley, 1924; Hayashi, 2006); Pinna muricata and lamina. Stylocerite blunt. Third maxil- L., 1758 (Jacquotte, 1963; Hipeau-Jacquotte, liped with narrow penultimate segment and 1967, 1974b; Bruce, 1976d, 1976e, 1978b, 1978c; very broad antepenultimate segment. Basis Hayashi, 2006); Pinna sp. (Miers, 1884; and ischium of first pereiopod with row of Ortmann, 1894; Rathbun, 1914; Holthuis, 1952; long slender setae on ventral margins; chela Johnson, 1961; McNeill, 1968; Bruce, 1989, 1993; slightly sub-spatulate, cannulate, palm with Bruce & Coombes, 1995; Li, 2001; Li & Liu, rows of long slender plumose setae on oppo- 2002; Li et al., 2004); Streptopinna saccata (L., site margins; cutting edges minutely pecti- 1758) (Forskål, 1775, as Pinna saccata ; Forskål, nate along distal 2/3. Second pereiopods well 1775; Hayashi, 2002, 2006). Also recorded from developed; chela robust; dactylus with con- Turbinellidae : Vasum sp. (Bruce,1996;Hayashi, cave outer margin and large triangular tooth 2006); Cardiidae ( Tridacninae ): Tridacna

in proximal half of cutting edge; fixed finger gigas (?) (L., 1758) (Pesta, 1911, 1913; Hayashi, with 3–6 small teeth in proximal half; palm 2006); and Isognomonidae : Isognomon isogwithout tympanal organ. Ambulatory dactyli nomum (L., 1758) (Hayashi, 2006). In addition, simple, sparsely provided with flattened scale- one record from an ‘infra-branchial chamber like spinules on unguis. of a large gastropod’ (Lanchester, 1902).

Remarks. The specimens of this well-known Now newly recorded from Atrina pectinata species show no aberrant features. (L., 1767Downloaded). from Brill.com 06/24/2024 12:38:05 AM via Open Access. This is an open access article distributed under the terms of the CC-BY 4.0 license. https://creativecommons.org/licenses/by/4.0/

Distribution. Widely distributed in the Lanka (Müller, 1887); Kenya and Zanziber Indo-Pacific, from the Red Sea south to (Bruce, 1976d); Philippines (Bruce, 1989); Moçambique and Madagascar to Japan, Hong-Kong (Bruce, 1979a; Chow et al., 2021); the Philippines, eastward to Fiji. Lohajae (= Singapore (Johnson, 1961, 1979; Johnson & Al-Luhayya, Yemen), Red Sea (Forskål, 1775; Liang, 1966; Anker & De Grave, 2016); Hainan Tattersall, 1921; Vine, 1986); Dar es Salaam, Island, South China Sea(Li, 2001;Li&Liu,2002; Tanzania ( Ortmann, 1894); Madagascar Li et al., 2004); Ambon, Indonesia (Fransen, (Jacquotte, 1963; Hipeau-Jacquotte, 1967, 1994a); Bay of Jakarta, Indonesia (Holthuis, 1973b, 1974b, 1974c, 1974d, 1975b; Thomassin, 1952); Kera, near Timor, Indonesia (Holthuis, 1974; Bruce, 1978b; Gan et al., 2015); Gulf of 1952); Kai Island, Indonesia (Holtuis, 1952) ; Mannar (Pearson, 1905; Bruce, 1976e); Sri Siau Island Downloaded, Indonesia from Brill.com (Holthuis, 1952 06/24/2024 12:38);:05 AM

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Pulau Bidan, Penang, Malaysia (Lanchester, Kou et al., 2015); Monte Bello Islands, 1902); Australia (Bruce, 1977a); Queensland, Australia ( Rathbun, 1914); Tre Island , Vietnam Australia ( Miers , 1884; McNeill , 1968; Bruce , (Bruce, 1993); South Vietnam (Britayev & 1977b); Moreton Bay , Australia (Li, 2008a; Fachrutdinov Downloaded, 1994 from); Papua Brill.com New 06/24/2024 Guinea 12:38:05 AM

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(De Grave, 1999); New Caledonia (Bruce, 1996); Neoanchistus cardiodytes Bruce, 1975 . Gender: Fiji (Dana, 1852, as Viti); Takao, South Taiwan masculine.

(Holthuis, 1952); Samoa (Pesta, 1911, 1913). Now Diagnosis (after Bruce, 1995: 83). Small sized for the first time recorded from these localities shrimps of stout,depressed body form.Rostrum

in Indonesia: Seribu Archipelago (Thousand well developed, thickened, blunt, unarmed, lat- Islands), Sunda Islands, SW Sulawesi, and New eral carinae indistinct. Carapace smooth, gla- Guinea. Additionally, now also recorded from brous, inferior orbital angle and orbit obsolete, Okinawa, Japan; Masicoh, Oman; and Zeel supraorbital, epigastric, hepatic and antennal Island (presumably Halat Za’al, Saudi Arabia). spines absent. Anterolateral angel of carapace broadly rounded. Abdomen smooth, gla- Genus Neoanchistus Bruce, 1975 brous, pleura with posterior margins rounded. Neoanchistus Bruce, 1975a: 149 . Type spe- Telson narrow, with two pairs of minute dorsal cies, by original designation and monotypy: spines and Downloaded three pairs from of posterior Brill.com spines 06/24/2024. 12:38 Eye:05 AM via Open Access. This is an open access article distributed under the terms of the CC-BY 4.0 license. https://creativecommons.org/licenses/by/4.0/

normal, with globular cornea. Antennula with coxal endite fused to basal endite, exopod basal segment of peduncle without distolat- well developed, caridean lobe broad, exopod eral tooth. Antenna with basicerite unarmed. with plumose terminal setae, epipod bilobed; Scaphocerite well developed with moderately second maxilliped normal, dactylar segment sized distolateral tooth;slit between distolateral narrow, exopod with terminal plumose setae, tooth and lamina shallow. Epistome unarmed. epipod subrectangular, without podobranch; Mandible without palp, molar process robust, third maxilliped with endopod slender, ischioincisor process feeble; maxillula with feebly merus and basis fused, exopod flagellum with bilobed palp, laciniae normal; maxilla with plumose terminal setae, coxa with oval lateral simple palp, basal endite bilobed, scaphog- plate, arthrobranch rudimentary. Fourth thonathite moderately broad; first maxilliped with racic sternite unarmed. First pereiopods slensetose palp, basal endite broadly rounded, der, sub-spatulate Downloaded, with from cutting Brill.com edges minutely 06/24/2024 12:38:05 AM via Open Access. This is an open access article distributed under the terms of the CC-BY 4.0 license. https://creativecommons.org/licenses/by/4.0/

pectinate. Second pereiopods small, subequal, Abdomen smooth, glabrous, pleura with possimilar, stout, dactylus hamate. Ambulatory terior margins rounded. Telson narrow, with pereiopods robust, dactyli hooked, unguis two pairs of small dorsal spines at 0.6 and 0.8 simple, large, with dorsal margin with minute of telson length and three pairs of posterior scale-like spinules. Uropod with protopodite spines. Basal segment of antennular peduncle posterolaterally acutely produced, exopod with distolaterally rounded; outer flagellum fused small mobile posterolateral spine. in basal two segments, shorter free ramus Two species are recognized: Neoanchistus two-segmented, longer ramus four-segmented. cardiodytes Bruce, 1975 , and Neoanchistus Scaphocerite with straight lateral margins; slit nasalis Holthuis, 1986 . Both species occur between distolateral tooth and lamina shalin bivalve hosts. The species can be distin- low. First pereiopods with chela sub-spatulate; guished as follows: lateral cutting edges proximally gaping, dis-

tally minutely pectinate; merus with peg-like

spinules on inner margin of proximal part. Key to the species of Neoanchistus Dactylus of second chela strongly hooked,

overreaching fixed finger, with one small blunt 1. Rostrum reaching end of antennular tooth at about one-third of its length; fixed

peduncle; outer antennular flagellum finger with a small tooth halfway the cutting

with two basal segments fused; dactyli edge. Ambulatory pereiopods without dis-

of ambulatory pereiopods slender......... toventral spines in propodus of third pereio-

................................................... N.cardiodytes pod, with simple slender dactyli; unguis with – Rostrum reaching halfway second minute scale-like spinules dorsally.

segment antennular peduncle; outer Remarks. The tympanal organ in the prox-

antennular flagellum with seven basal imal medio-ventral surface of the palm in

segments fused; dactyli of ambulatory the second pereiopods is not reported in the

pereiopods stout........................... N.nasalis type-description. This feature however could

have been overlooked. Neoanchistus cardiodytes Bruce, 1975 Colour (fig. 28A). Bruce (1975a: 158): “Body

(fig. 28A) covered dorsally with round or slightly irregu- Neoanchistus cardiodytes Bruce, 1975a : lar reddish markings, with margins darker than 149–165, figs. 1–6 [type locality: Nosy Bé, centres. Appendages with similar red stripes Madagascar]; Bruce, 1978b: 287; Müller, 1993: (A.G. Humes, in litt.).” Britayev & Marin (2011) 39 (listed); Holthuis, 1993: 153, fig. 142 (listed); published a colour photograph of the species. Fransen, 1994a: 111 (listed); Li, 2000: 81, fig. 81 Hosts. Recorded from Cardiidae , (listed); Britayev & Marin, 2011: 1–3, fig. 1; De Trachicardiinae: Vasticardium pectiniforme Grave & Fransen, 2011: 353 (listed). (Born, 1780) (Bruce, 1975a (as Trachicardium / Diagnosis. Rostrum stout, depressed, Cardium pectiniforme Born, 1780 )). Also extending slightly beyond antennular pedun- from Mactridae : Mactra grandis Gmelin, 1791 cle, without teeth not setae, broadened in dor- (Britayev & Marin, 2011). Now recorded from sal view by thick lateral expansions, distally an unidentified Vasticardium Iredale, 1927 . truncated, proximally slightly constricted. Distribution. Nosi Bé, Madagascar (Bruce, Carapace without spines. Inferior orbital angle 1975a); Vietnam (Britayev & Marin, 2011). rounded, slightly produced. Anterolateral Now for the first time recorded from Madang angle of carapace rounded, not produced. Lagoon Downloaded (stn. PR107 from; 05°10.2 Brill.com ’S – 145 06/24/2024 °50.4 12:38 ’E),:05 AM

via Open Access. This is an open access article distributed under the terms

of the CC-BY 4.0 license.

https://creativecommons.org/licenses/by/4.0/

Papua New Guinea (A. Anker, pers. comm.; see fig. 28A).