Mictaxius salvati, Ngoc-Ho, 2005

Ngoc-Ho, Nguyen, 2005, Thalassinidea (Crustacea, Decapoda) from French Polynesia, Zoosystema 27 (1), pp. 47-83 : 66

publication ID	https://doi.org/ 10.5281/zenodo.5403398
persistent identifier	https://treatment.plazi.org/id/8C326C28-FFFF-FFBD-FEFF-FBD7FB42F94C
treatment provided by	Marcus
scientific name	Mictaxius salvati
status	sp. nov.

Treatment

Mictaxius salvati View in CoL n. sp.

( Figs 10 View FIG ; 11 View FIG )

TYPE MATERIAL. — Holotype: French Polynesia, Mururoa , Mission II Tuamotu, 40 m, 1965, B. Salvat coll., hermaphrodite ovigerous specimen, broken, poor condition, cl. 4 mm, tl. 14 mm ( MNHN Th 1417).

ETYMOLOGY. — The species is named for Bernard Salvat who collected the material.

OTHER MATERIAL EXAMINED. — Mictaxius sp. 1 , Tahiti, Moorea Island, Tiahura, B. A. Thomassin coll., stn Tia 23, no date, 1, 1 without pereopods, tl. 8 mm and 7.2 mm (MNHN Th 1302).

DISTRIBUTION. — Mururoa, Tuamotu; Tahiti, Society, French Polynesia.

DIAGNOSIS. — Hermaphrodite. Carapace with obsolete rostrum, linea thalassinica running full length of carapace, anterolateral setal row of about 12 setae, cervical groove present in median part. Abdominal somite

1 narrow, without anterolateral lobes. Telson 1.2 times as long as broad, lateral border convex in proximal half and tapering to posterior border.

Eyestalks slightly flattened, adpressed, acute distomesially, cornea distolateral. A1 peduncle slightly shorter than that of A2, latter with minute acicle. Mx2 with long posterior seta on scaphognathite. Mxp3 pediform with small exopod, ischium with stiff setae on proximal half of lower border and weak mesial crest.

P1 subequal, similar; nine or ten lower spinules on ischium, merus with convex lower border, fixed finger with small triangular tooth near midlength of cutting edge, dactylus unarmed. Plp1 of two articles. Plp2 with appendix masculina and appendix interna. Plp3-5 with digitiform appendix interna. Uropod endopod and exopod rounded, unarmed except for small spine on median carina of endopod.

DESCRIPTION

Carapace ( Fig. 10A View FIG ) with obsolete rostrum; linea thalassinica lateral to eyes running full length of carapace; anterolateral setal row of about 12 setae; cervical groove present in median part; dorsoposterior margin excavate, continuous to posterior margin, without setal rows. Abdominal somite 1 ( Fig. 10B View FIG ) narrower than somite 2, without anterolateral lobes, pleuron rounded ventrally, lateral setal row present with six or seven hardly visible setae; abdominal somite 2 weakly overlapping somite 1; abdominal somites 2-6 of approximately same length, flattened, without setal rows. Telson ( Fig. 10J View FIG ) 1.2 times as long as broad, lateral border convex in proximal half and tapering to slightly rounded posterior border.

Eyestalks ( Fig. 10A View FIG ) slightly flattened, adpressed, acute distomesially, cornea distolateral. A1 ( Fig. 10A View FIG ) with article 1 shorter than eyestalk, article 2 shorter than article 1, article 3 subequal to article 1. A2 ( Fig. 10H View FIG ) with minute acicle; article 5 half as long as article 4, reaching just beyond last antennular article. Md ( Fig. 10I View FIG ) with small teeth on cutting edge. Mx2 ( Fig. 10E View FIG ) scaphognathite carrying posterior seta about 1.4 times its length. Mxp1 and 2 ( Fig. 11D, F View FIG ) as figured, Mxp1 epipod tapering distally. Mxp3 ( Fig. 10F, G View FIG ) pediform, with small exopod; small lower spine on coxa; ischium two times as long as merus, with stiff setae on proximal half of lower border and weak mesial crest of 12-13 spines;