Teleotanais madara, Tanabe & Kakui, 2019
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publication ID |
https://doi.org/ 10.12782/specdiv.24.181 |
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publication LSID |
lsid:zoobank.org:pub:9A02F634-878F-4EA8-BE34-231B95E35DB1 |
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persistent identifier |
https://treatment.plazi.org/id/03A687C9-FFD1-FFC3-734B-F9DDFE2AF78A |
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treatment provided by |
Felipe |
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scientific name |
Teleotanais madara |
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Family Teleotanaidae Bamber, 2008 View in CoL
[New Japanese name: Madara-tanaisu-ka] Genus Teleotanais Lang, 1956 [New Japanese name: Madara-tanaisu-zoku] Teleotanais madara sp. nov. [New Japanese name: Madara-tanaisu] ( Figs 1–3 View Fig View Fig View Fig )
Diagnosis. Antennule darkly pigmented; article 2 with mid-inner simple seta. Antennal article 3 with single simple seta in distal region. Maxilliped with endite bearing distal serrate-tipped curved-spiniform seta and subdistal serratetipped spiniform seta in inner dorsal region; palp article 4 with mid-outer simple seta. Cheliped with fixed finger bearing one or two ventral simple setae; dactylus with two subproximal simple setae on cutting surface. Pereopod-1 merus with two ventrodistal simple setae being half as long as width of merus. Dactylus–unguis of pereopods 4–6 not fused. Uropod with basal article bearing two ventral simple setae; endopod biarticulate.
Etymology. This species-group name is derived from the Japanese noun madara (mottled), referring to the mottling on the body.
Material Examined. Holotype: ovigerous female, ICHUM-5844, BL 2.58 mm, CW 0.35 mm, dissected, eight slides and one vial; INSD accession number LC472886 View Materials ; mouth of Shiira River (24°19′25.1″N 123°54′38.3″E), Iriomote Island, Ryukyu Islands, southwestern Japan, mud on mangrove roots, 23.ii.2017, collected by Y. Tanabe. GoogleMaps Paratypes: three preparatory females (ICHUM-5845, BL 1.66 mm, CW 0.25 mm, dissected, six slides and one vial; ICHUM-5846, BL 2.50 mm, CW 0.29 mm, dissected, nine slides and one vial; ICHUM-5847, BL 2.55 mm, CW 0.30 mm, dissected, six slides and one vial); same collection data as for holotype.
Description of female. Based primarily on ICHUM- 5844, with some observations from ICHUM-5845–5847.
Body ( Figs 1 View Fig , 2A, B View Fig ) dorsoventrally flattened, seven times as long as CW, pigmented red-brown ( Fig. 1 View Fig ; pigmentation retained in ethanol). Cephalothorax length 0.16 times as long as BL, length 1.23 times width, with pair of simple setae posterior to eyes and pair of mid-lateral simple setae. Pereonites 1–6 with length ratio 1.00: 1.10:1.18: 1.33:1.23: 1.04; pereonites with pair of lateral simple setae. Pleon length 0.16 times BL. Pleonites all wider than long, with pair of dorsal simple setae; pleonites 1–4 with pair of mid-lateral circumplumose setae ( Fig. 2B View Fig 1 View Fig ); pleonite 5 with two pairs of simple mid-lateral setae. Pleotelson length 0.72 times width, as wide as pleonites, with three pairs of lateral simple setae and pair of posterior simple setae.
Antennule ( Fig. 2C View Fig ) 0.80 times as long as cephalothorax; articles 1–4 with length ratio 1.00: 0.38: 0.31: 0.43. Article 1 with outer distal simple seta and several outer subproximal and outer distal PSS. Article 2 with one mid-inner, one outer distal, and one inner distal simple setae and several distal PSS. Article 3 with one outer distal and one inner distal simple setae. Article 4 with several simple setae and two aesthetascs in distal region. Antenna ( Fig. 2D, L View Fig ) with six articles (article 1 fused to cephalothorax; Fig. 2L View Fig , arrowhead), 0.95 times as long as antennule; articles 2–6 with length ratio 1.00: 2.60: 2.03: 1.39: 0.33. Articles 1 and 2 naked. Article 3 with one dorsosubproximal, one mid-dorsal, and one dorsodistal simple setae. Article 4 with one dorsodistal and one ventrodistal simple setae and several PSS. Article 5 with one mid-ventral and one dorsodistal simple setae and distal PSS. Article 6 with five distal simple setae.
Labrum ( Fig. 2E View Fig ) not projected anteriorly, setulate distally. Mandibles ( Fig. 2F, G View Fig ) with well-developed conical molar process, denticulate in masticatory region. Left mandible ( Fig. 2F View Fig ) with denticulate incisor and denticulate lacinia mobilis. Right mandible ( Fig. 2G View Fig ) with bifurcate incisor, subdistal anterior margin crenulate. Labium ( Fig. 2H View Fig ) with inner and outer lobes setulate on distal margin; outer lobe much larger, without labial process. Maxillular ( Fig. 2I View Fig ) endite with eleven spiniform setae, and outer subdistal setation; palp broken. Maxilla ( Fig. 2I View Fig , arrowhead) naked. Maxilliped ( Fig. 2J, J1–3 View Fig View Fig View Fig ) with medially fused basis bearing ventral simple seta at insertion of palp (seta reaching beyond distal margin of endite). Endite ( Fig. 2J View Fig 1 View Fig ) with outer distal simple seta, and three (left) or two (right) distal spiniform setae; inner dorsal region with distal serrate-tipped curvedspiniform seta ( Fig. 2J2 View Fig ) and subdistal serrate-tipped spiniform seta ( Fig. 2J View Fig 3 View Fig ); inner ventral region with distal round- ed bulge. Palp article 1 naked; article 2 with one (right) or zero (left) outer and four inner simple setae; article 3 with ten inner simple setae; article 4 with nine distal and one mid-outer simple setae. Epignath ( Fig. 2K View Fig ) narrow, curved, with fine setae distally.
Cheliped ( Fig. 3A, A View Fig 1 View Fig ) broadly articulated with cephalothorax via sclerite ( Fig. 2B View Fig ); sclerite extending to posterior margin of cephalothorax. Basis almost as long as wide, with slight free posterior portion and outer dorsal simple seta. Merus with ventral simple seta. Carpus as long as propodus including fixed finger, with one dorsodistal and two ventral simple setae. Propodal palm longer than fixed finger, with one outer and four inner simple setae at insertion of dactylus. Fixed finger with two simple setae on ventral margin; cutting surface with four outer and one inner simple setae, and outer lamellar expansion; triangular claw present. Dactylus (note: proximal portion partly broken in Fig. 3A, A View Fig 1 View Fig ) as long as fixed finger, with inner subproximal simple seta; cutting surface with two subproximal simple setae; unguis fused to dactylus.
Pereopod 1 ( Fig. 3B View Fig ) with length ratio of basis, ischium, merus, carpus, propodus, and dactylus–unguis 1.00: 0.07: 0.41: 0.29: 0.63: 0.57. Coxa with simple seta. Basis cylindrical, length 3.56 times width, with simple seta and two PSS in dorsosubproximal region. Ischium with ventral simple seta. Merus with two ventrodistal simple setae being half as long as width of merus. Carpus with four distal simple setae. Propodus with four subdistal simple setae. Dactylus with subproximal simple seta. Unguis 1.11 times as long as dactylus, naked. Pereopod 2 ( Fig. 3C View Fig ) with length ratio of articles from basis to dactylus–unguis 1.00: 0.05: 0.25: 0.28: 0.50: 0.55. Coxa with simple seta. Basis cylindrical, narrow, length 3.41 times width, with one simple seta and PSS in dorsosubproximal region. Ischium with ventral simple seta. Merus with ventrodistal simple seta. Carpus with three distal simple setae. Propodus with four subdistal simple setae. Dactylus with subproximal simple seta. Unguis as long as dactylus, naked. Pereopod 3 ( Fig. 3D View Fig ) with length ratio of articles from basis to dactylus–unguis 1.00: 0.09: 0.27: 0.35: 0.59: 0.70. Similar to pereopod 2, except basis without dorsal simple seta. Pereopod 4 ( Fig. 3E View Fig ) with length ratio of articles from basis to dactylus–unguis 1.00:0.03:0.42:0.24:0.41:0.28. Coxa present, with simple seta. Basis thick, length 2.53 times width, with two dorsosubproximal and two ventrodistal PSS. Ischium with ventral simple seta (note: hinge between ischium and merus disjointed in Fig. 3E View Fig ). Merus with two ventrosubdistal spiniform setae. Carpus with dorsodistal simple seta and three distal spiniform setae. Propodus with three dorsosubdistal simple setae, dorsal PSS, and two ventrosubdistal spiniform setae. Dactylus with dorsal simple seta. Unguis naked. Pereopod 5 ( Fig. 3F View Fig ) with length ratio of articles from basis to dactylus–unguis 1.00: 0.06: 0.49: 0.35: 0.50: 0.39. Similar to pereopod 4, except coxa naked, basis without PSS, and ischium with two ventral simple setae. Pereopod 6 ( Fig. 3G View Fig ) with length ratio of articles from basis to dactylus–unguis 1.00: 0.07: 0.27: 0.37: 0.37: 0.34. Similar to pereopod 4, except coxa naked, basis without ventrodistal PSS, propodus with nine dorsodistal simple setae, and dactylus with two dorsal simple setae (note: distal portion of carpus partly broken in Fig. 3G View Fig ).
Pleopod 1 ( Fig. 3H View Fig 1 View Fig , H 2 View Fig ) with basal article bearing inner plumose seta. Endopod with one inner and nine outer plumose setae, and distal step-tipped seta. Exopod 1.11 times as long as endopod, with 19 outer plumose setae. Pleopods 2–5 similar to pleopod 1, except for numbers of plumose setae on outer margin of endopod and exopod, and pleopod 5 endopod having two inner plumose setae.
Uropod ( Fig. 3I View Fig ) biramous. Basal article with two ventrodistal simple setae. Endopod biarticulate; article 1 with dorsodistal simple seta; article 2 with four distal simple setae. Exopod biarticulate; article 1 with distal simple seta; article 2 with two distal simple setae.
Variation and stability. In addition to the holotype, three female paratypes were dissected and data were obtained for the same 13 characters as listed in Table 1. Among the four specimens, the character states for eleven of the characters were identical ( T. madara column, Table 1); the exceptions were the number of distal spiniform setae on the maxillipedal endite (two on the right endite in the holotype; three in the others), and the ventral simple setae on the fixed finger (one in ICHUM-5845; two in the others).
Genetic information. Part of the COI gene (652 nt, translating into 217 amino acids) was determined from the holotype female. The three sequences in the INSD most similar to the COI sequence, as determined by BLAST searches ( Altschul et al. 1990), were from two insect and one spider species ( INSD accession numbers KJ837447, JF411102, and DQ353285; 77.57–78.62% in identity scores) but their query cover was only 41–65 %. To date, no other teleotanaid nucleotide sequences have been deposited in public databases ( DDBJ 2019 ) .
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.