Munidopsis lenzii Balss, 1913

Published, First, 2007, Species of the genus Munidopsis Whiteaves, 1784 from the Indian and Pacific Oceans and reestablishment of the genus Galacantha A. Milne-Edwards, 1880 (Crustacea, Decapoda, Galatheidae), Zootaxa 1417, pp. 1-135 : 74-76

Munidopsis lenzii Balss, 1913

( Fig. 35)

Munidopsis lenzii Balss, 1913: 222 ; 2005: 290.

Munidopsis (Munidopsis) lenzii .— Doflein & Balss, 1913: 151, figs. 16–18, pl. 15: fig. 1.

Material examined. Nias, South Canal, W of Sumatra, Deutschen Tiefsee-Expedition (Valdivia), Stn 194, 614 m: 1 M 8.8 mm, holotype ( ZMB 17499) .

Description. Carapace slightly longer than broad; dorsal surface moderately convex from side to side, sparsely setose, with numerous short striae; regions well delineated by furrows including distinct anterior and posterior cervical grooves. Two epigastric spines. Median branchial region well marked. Posterior cardiac region bluntly triangular, preceded by deep transverse depression. Posterior margin preceded by weakly ele- vated ridge. Rostrum triangular, moderately compressed, curved and deflexed in distal half, tip upturned, 0.3 length of remaining carapace, maximum width one-fifth carapace breadth, ending in acute tip; dorsal surface slightly convex, sparsely with small striae, but without longitudinal ridge or groove; lateral margins carinated. Lateral margins weakly convex and subparallel, anterolateral spine well-developed, end of anterior cervical groove with distinct notch, anterior branchial margin with acute spine and additional small spine (on left side only), posterior cervical groove without notch at anterior end. Frontal margin nearly transverse behind ocular peduncle, leading to acute antennal spine, then slightly oblique toward anterolateral spine.

Pterygostomian flap smooth, with small short striae and granules, anteriorly unarmed.

Sternum with numerous short setiferous striae and granules, as long as wide, maximum width at sternite 7. Sternite 3 moderately narrow, nearly 3 times wider than long, anterior margin not divided into 2 lobes, without deep median notch; lateral margin of each lobe convex. Sternite 4 narrowly elongate anteriorly; surface weakly depressed in midline; greatest width nearly 3 times that of sternite 3.

Abdomen smooth, setose, without spines; segments 2ñ4 each with anterior ridge weakly elevated, followed by transverse groove, segments 5–6 smooth; segment 6 with weakly produced posterolateral lobes and nearly transverse posteromedian margin. Telson composed of 12 plates; posterior plates combined twice as wide as long.

Ocular peduncle movable; cornea unarmed, much longer than remaining eyestalk. Well-developed spine ventral to front margin between ocular and antennal peduncles.

Basal article of antennular peduncle with strong dorsolateral and distolateral spines; distomesial spine well-developed.

Antennal peduncle reaching tip of eye; article 1 with blunt distomesial process, strong distolateral spine nearly reaching end of article 2; articles 2–3 armed with acute distolateral spine, distomesial angle of article 3 acute; article 4 unarmed.

Mxp 3 ischium as long as than merus measured on extensor margin; flexor and extensor margins terminating in acute spine; 18 corneous denticles on crista dentata; flexor margin of merus with 2 strong spines, extensor margin with small distal spine.

P1 subequal, twice longer than postorbital carapace, covered with dense soft plumose and simple setae and short striae on merus to dactylus. Ischium with strong distomesial and distolateral spines. Merus with 3 strong distal spines (lateral, mesial, and dorsal), and one and 2 spines on mesial margin and dorsal side, respectively. Carpus nearly twice longer than high, with 3 well-developed distal spines. Palm slender, 1.4 times length of carpus, and slightly longer than fingers. Fingers not gaping, distally spooned; prehensile edges each with row of subtriangular teeth, proximal teeth obsolete; fixed and movable fingers ending in 3 and 2 distal teeth, respectively.

P2–P4 moderately stout, with small granules and short striae on lateral side of articles, decreasing in size posteriorly; P2 longest, ischium to dactylus with numerous soft plumose and simple setae, more numerous along dorsal and ventral margins. P2 clearly not overreaching end of P1; merus elongate, 0.5 times carapace length, 1.2 times P4 merus, 3 times longer than high, more than 2.5 times length of carpus and 1.5 times length of propodus, dorsal margin with row of well-developed spines, increasing in size distally, also present on P3 and P4, ventral margin with acute striae, without spines; carpus with 1 strong distal spine on dorsal margin, dorsal side with longitudinal crest; propodus 3 times as long as high, unarmed except for 1 corneous distal spine on ventral margin; dactylus 0.7 length of propodus; distal claw short, moderately curved; flexor margin nearly straight, with 6 teeth deceasing in size proximally, each with single long setae.

Epipods absent from pereiopods.

Distribution. Only known from the type locality, west of Sumatra, at 614 m.