Ethusa longidentata Chen, 1997

Castro, Peter, 2005, Crabs of the subfamily Ethusinae Guinot, 1977 (Crustacea, Decapoda, Brachyura, Dorippidae) of the Indo-West Pacific region, Zoosystema 27 (3), pp. 499-600 : 534

publication ID	https://doi.org/ 10.5281/zenodo.5399909
DOI	https://doi.org/10.5281/zenodo.5475546
persistent identifier	https://treatment.plazi.org/id/264A053E-4E0F-B507-71C2-FF277543C6DC
treatment provided by	Marcus
scientific name	Ethusa longidentata Chen, 1997
status

Treatment

Ethusa longidentata Chen, 1997 View in CoL

Ethusa longidentata Chen, 1997: 619 View in CoL , fig. 5.

Ethusa pygmaea View in CoL – Ihle 1916b: 141, 151 (list), 153 (list), 156 (list) (not E. pygmaea Alcock, 1894 View in CoL ).

TYPE MATERIAL. — Holotype: cl 6.5 mm, cw 5.8 mm, damaged, KARUBAR, stn DW 28 ( MNHN-B 22884 ); paratype: cl. 7.0 mm, cw 6.6 mm, same station ( MNHN-B 22889 ).

TYPE LOCALITY. — Indonesia, Kai Islands, 05°31’S, 132°54’E, 448- 467 m.

MATERIAL EXAMINED. — Indonesia. Lesser Sunda Islands, Siboga , stn 51, Flores, south Molo Pass, 69- 91 m, 19.IV.1899, 8, 1 juv., 8, 2 ovig.

( ZMA Crust.De 241692). — Stn 289, off south coast of Timor, 09°0.3’S, 126°24.5’E, 112 m, 20.I.1900, 1 damaged ( ZMA Crust.De 241710).

Kai Islands, KARUBAR, stn DW 28, 05 °31’S, 132°54’E, 448-467 m, 26.X.1991, 1 holotype ( MNHN-B 22884), 1 paratype ( MNHN-B 22889).

Solomon Islands. SALOMON 1, stn CP 1770, 08°19.6’S, 160°38.7’E, 453-542 m, 1.X.2001, 1 ( MNHN-B 28548). — Stn CP 1795, 09°18.8’S, 160°22.9’E, 442-451 m, 1.X.2001, 1 ( MNHN-B 28549).

DISTRIBUTION. — Indonesia (Celebes, Lesser Sunda Is, Irian Jaya [ Ihle 1916b], Kai Is [ Ihle 1916b; Chen 1997]), and now from the Solomon Is. Depth: 69-141 m ( Ihle 1916b), 442-542 m ( Fig. 34 View FIG ).

SIZE. — Maximum size: cl 8.0 mm, cw 7.6 mm ( MNHN-B 28548), cl 7.0 mm, cw 6.6 mm ( MNHN-B 22889).

REMARKS

Ethusa longidentata is a small-size species which is characterized by very long and slender outer orbital teeth ( Chen 1997: fig. 5a), U-shaped orbital sinuses, and by short and stout G1 that are slightly bent in the middle portion ( Chen 1997: fig. 5f-i). The anterior border of the endostome extends above the level of the antennular fossae of the basal antennular articles.

The Siboga material from Indonesia that was identified as E. pygmaea Alcock, 1894 , by Ihle (1916b), is very close, if not conspecific, to E. longidentata . Although the specimens are in poor condition, they clearly share the morphology of their endostomes with E. longidentata . They were collected from depths (69-141 m) shallower than those of E. longidentata (442-542 m), however.