Martensodesmus bedosae
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Ordo: Polydesmida
Familia: Opisotretidae
Genus: Martensodesmus
Name
Martensodesmus bedosae Golovatch & Geoffroy & Stoev & Spiegel, 2013 sp. n. – Wikispecies link – ZooBank link – Pensoft Profile
Type material
Holotype ♂ (IZAS), China, Guangxi, Hechi County, Duan Xian, Baling karst hill, disturbed forest, 109.07333°E, 23.98171°N, litter, sieving and Berlese extraction, 26.04.2010, leg. L. Deharveng & A. Bedos (CHIgx10-61).
Paratypes
1 ♂ fragmented, 1 ♀ fragment (SCAU), 1 ♂, 1 ♀ (MNHN JC 344), 1 ♂ (SEM), same locality, together with holotype.
Diagnosis
Differs readily fromcongeners by the presence of a well-developed frontobasal process p on the ventral side of the gonopod femorite, coupled with no modifications on the ♂ vertex.
Name
Honours Anne Bedos, one of the collectors.
Description
Length of holotype and ♂ paratypes ca 4.0 mm, width of midbody pro- and metazona ca 0.4 and 0.6 mm, respectively. Length of ♀ paratypes ca 5.5 mm, width of midbody pro- and metazona ca 0.6-0.65 and 0.8-0.9 mm, respectively. Coloration in alcohol from nearly uniformly pallid to head, collum and following metazona (especially their caudal halves) light rusty brown, anterior body portion in ♂♂ being clearly more infuscate, rusty brown, compared to ♀♀.
Body with 19 (♂) or 20 (♀) segments. All characters like in Retrodesmus cavernicola sp. n., except as follows.
Antennae medium-sized, strongly clavate, extending behind segment 3 (♂, broken off in the sole complete ♀) when stretched dorsally.
In width, collum << segments 2 & 3 < head = 4 < 5 < 6=15 (16); thereafter body gradually tapering towards telson. Paraterga well-developed (Figs 30A–F, H, J), starting from a rather broadly rounded, kidney-shaped collum, mostly only faintly declivous to continue the outline of a rather slightly convex dorsum, largely set high, at about 1/3 of midbody height, with evident shoulders frontolaterally (Figs 30A–C). Caudal corner of postcollum paraterga mostly broadly rounded, obtuse-angular, more narrowly rounded and very slightly extending behind rear tergal margin only in segments 16-18 (♂) or 17-19 (♀). Lateral edge of paraterga with 2 or 3 small setigerous indentations in poreless and poriferous segments, respectively. Ozopores very evident, round, flush open on dorsal surface, clearly removed from caudal margin and lying anteriorly to bottom of caudalmost lateral incision (Figs 30B, C, E, F, K, 31B), lateral tooth being clearly shorter than medial one. Each metatergum with 3+3, long, bacilliform setae arranged in 2 or 3 regular transverse rows; polygonal bosses invisible, transverse sulcus very shallow (Figs 30A–F, K).
Legs rather long and slender, ca 1.3-1.4 (♂) or 1.1-1.2 (♀) times as long as midbody height (♂); tarsi longest and particularly slender, with modified, dense, bifid setae ventrally (Fig. 31D), but sphaerotrichomes missing.
Gonopod telopodite (Figs 31E–H, 32) clearly curved, but stout, unipartite; basal half especially voluminous due to an unciform frontoventral process (p), more distally on caudal face with a strong subtriangular tooth (z) and two long spines (x and y), distal half with a short, finger-shaped, caudal process (d). Neither bacilliform ornamentations nor an accessory seminal chamber, nor a hairy pulvillus, seminal groove ending at base of a small subapical tooth.
Remarks
This new species is still unique in showing a marked process p at the base of the gonotelopodite.
Original Description
- Golovatch, S; Geoffroy, J; Stoev, P; Spiegel, D; 2013: Review of the millipede family Opisotretidae (Diplopoda, Polydesmida), with descriptions of new species ZooKeys, 302: 13-77. doi
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