Neogoneplax costata, Castro, 2007
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publication ID |
https://doi.org/ 10.5281/zenodo.4525564 |
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persistent identifier |
https://treatment.plazi.org/id/102B87CB-FFDC-2503-FC9D-FA03FF05FBF6 |
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treatment provided by |
Felipe |
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scientific name |
Neogoneplax costata |
| status |
sp. nov. |
Neogoneplax costata View in CoL n. sp.
( Figs 30-32 View FIG View FIG View FIG )
TYPE MATERIAL. — Tangle nets of local fishermen, ♂ holotype, cl 10.4 mm, 19.1 mm ( ZRC 2004.0723). Paratypes: three other male and female specimens from the Philippine Is as listed under Material examined.
Castro P.
TYPE LOCALITY. — Philippine Islands, Bohol, Balicasag I., off Panglao I., unrecorded depth.
MATERIAL EXAMINED. — Philippine Islands. Bohol, Balicasag I., off Panglao I., tangle nets of local fishermen, 200-300 m, VI.2002, 1 ♂ paratype, cl 9.4 mm, cw 17.9 mm (ex ZRC 2004.0722 View Materials ; MNHN-B 30064). — 25-30.VII.2003, 1 ♂ holotype, cl 10.4 mm, 19.1 mm ( ZRC 2004.0723 View Materials ). — 50-500 m, III.2004, 2 ♂♂ paratypes, cl 9.8 mm, cw 18.2 mm, cl 12.8 mm, cw 24.5 mm ( ZRC 2004.0721 View Materials ). — 29.V.2004, 1 ovig. ♀ paratype, cl 11.9 mm, cw 22.8 mm ( ZRC 2004.0784 View Materials ) .
? New Caledonia. LAGON, stn 500, 19°04’S, 163°60’E, 225 m, 1 ♂ ( MNHN-B 29777).
ETYMOLOGY. — From costa, Latin for “rib” or “ridge”, in reference to the two slight diagnostic ridges across the dorsal surface of the carapace.
DISTRIBUTION. — Known from the Philippine Is and questionably from New Caledonia. Depth: 225 m and from estimated depths of 50-500 m from tangle nets of local fishermen.
DESCRIPTON
Carapace ( Figs 30A View FIG ; 31 View FIG ) transversely rectangular,wider than long, anterolateral borders oblique from outer orbital tooth to posterior border. Carapace slightly convex, without clear indication of regions; ridge across anterior third portion; second, less conspicuous ridge on posterior third portion. Front sinuous, slightly deflected ventrally, marked by 2 slight emarginations, small median projection between emarginations. Notch between front, inner edge of supraorbital border absent. Supraorbital borders conspicuously bilobed; bordered by raised, finely granular edge, wider, sinuous along front; reduced, obtuse inner tooth. Suborbital borders granular, each with short, blunt inner tooth not visible dorsally. Long, slender, acute-tipped tooth on outer orbital angle; reduced anterolateral teeth appearing as slight prominence (obsolete in holotype) below outer orbital angle corresponding with outer margin of anterior ridge of carapace. Posterolateral borders oblique, nearly straight.
Revision of Goneplacinae ( Crustacea, Brachyura)
Eye peduncles ( Figs 30A View FIG ; 31 View FIG ) long (1.1 front width), cornea reniform.
Chelipeds (P1) ( Fig. 31 View FIG ) slightly unequal in males, nearly equal in female paratype; fingers shovel-like, curved, slightly shorter than propodus, much shorter in heavier P1 of males, with blunt teeth, heavier P1 of males with fewer teeth on dactylus, large cutting edge on fixed finger; no dark colour on fingers. Broad, acute-tipped tooth on inner (ventral), proximal margin of carpus; row of conspicuous, simple setae along inner (ventral) margin of dactylus, propodus, merus; outer margin of merus with 12-24 small, triangular teeth in small male (reduced to large, blunt tubercles in larger holotype and paratypes). Ambulatory legs (P2-P5) ( Fig. 31 View FIG ) stout, without teeth; varying number of setae on dorsal margins of carpus, propodi (P5 of female paratype with row of dense setae on dorsal margin of propodus, distal margin of carpus; proximal, ventral margin of dactylus); dactyli long, slender, each with carina along each side; length of P5 merus 0.7 cl.
Male abdomen ( Fig. 30B View FIG ) wide, short, triangular; telson much wider than long. Somite 3 covers space between P5 coxae, carinated; somite 2 narrower than somite 3, leaving large portion of thoracic sternite 8 visible. G1 ( Fig. 30C View FIG ) slender, sinuous, distal part curved, inwardly oriented; obtuse tip. G2 ( Fig. 30D View FIG ) slender, slightly longer than G1, curved flagellum longer than proximal part (peduncle), pointed tip.
Female abdomen wide, outer margin of thoracic sternites not visible.Telson much wider than long. Somite 3 covers space between P5 coxae, somites 1, 2 narrower than somite 3, leaving small portion of thoracic sternite 8 visible. Vulva ( Fig. 32 View FIG ) of mature paratype narrow, elongated, extending along edge of suture 5/6 to median portion of thoracic sternite 6; median, triangular vulvar cover.
COLOUR
Photographs of freshly preserved material from the Philippine Is showed small red spots on the carapace and legs.
REMARKS
The new species is closest to N. serratipes n. sp. (see below). Both species can be easily differentiated by the absence or reduction of the anterolateral tooth in N. costata n. sp. ( Figs 30A View FIG ; 31 View FIG ) while there is a conspicuous, acute tooth in N. serratipes n. sp. ( Figs 33A View FIG ; 34 View FIG ); smooth meri of ambulatory legs ( Fig. 31 View FIG ) in contrast to many teeth in N. serratipes n. sp. ( Figs 33B View FIG ; 34 View FIG ); the presence of a small, acute tooth on the outer (dorsal), distal margin of each of the chelipeds ( Fig. 31 View FIG ) in contrast to a larger, blunt tooth in N. serratipes n. sp. ( Fig. 34 View FIG ); the telson of the male abdomen is much shorter in N. serratipes n. sp. ( Fig. 33C View FIG ) than in N. costata n. sp. ( Fig. 30B View FIG ), smooth G1 ( Fig. 30C View FIG ) in contrast to a stout G1 with a bilobed tip with distinct denticles and setae in N. serratipes n. sp. ( Fig. 33D View FIG ).
A damaged, incomplete specimen from New Caledonia (♂, cw 14.8 mm; MNHN-B 29777) also appears to belong to the new species. It was the only specimen from outside the Philippine Is examined .
| ZRC |
Zoological Reference Collection, National University of Singapore |
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.