Carlotretus triramus sp. n. Figs 36-41

Type material.

Holotype ♂ (IZAS), China, Guangxi, Chongzuo County, Longzhou Xian, Shanglong Xiang, Lenglei, Nonggang Forest, 106.964835°E, 22.467175°N, litter, Berlese extraction, 07.03.2005, leg. L. Deharveng & A. Bedos (CHIgx05-068).

Paratypes.

1 ♂ (SEM), same data as holotype (CHIgx05-066); 1 ♂ (SCAU), same locality, Shanglong Xiang, Nonghang, Nonggang Forest, 106.90575°E, 22.48617°N, litter, sieving and Berlese extraction, 14.04.2010, leg. L. Deharveng & A. Bedos (CHIgx10-07).

Non-types. 1 ♂ subadult (SEM), same locality, together with holotype (CHIgx05-068); 1♀ (SEM), same data as holotype (CHIgx05-064); 1♀, 3 ♀ subadults (MNHN JC 346), same locality (CHIgx10-07).

Diagnosis.

Differs readily from Carlotretus setosus, the only known congener, by the much longer, strong and totally unprotected solenomere branch, whereas the parabasal branches are slender and subunciform.

Name .

To emphasize the clearly triramous midlength process of the gonopod telopodite.

Description.

Length of holotype ca 4.3 mm, width of midbody pro- and metazona ca 0.4 and 0.55 mm, respectively. Length of paratype ♂ ca 4.6 mm, width of midbody pro- and metazona ca 0.45 and 0.6 mm, respectively. Length of adult ♀ ca 6.0 mm, width of midbody pro- and metazona ca 0.6 and 0.7 mm, respectively. Coloration in alcohol from uniformly pallid to head and metaterga faintly rusty reddish.

Body with 19 (♂) or 20 (♀) segments. All characters like in Martensodesmus spiniger sp. n., except as follows.

Antennae medium-sized, extending behind segment 2 when stretched dorsally.

Caudal corner of postcollum paraterga mostly dentiform, always clearly rounded and extending increasingly well behind rear tergal margin only in segments 15-18 (♂) or 16-19 (♀), a little better produced behind than in Martensodesmus spiniger sp. n. (Figs 36A, B).

Gonopod telopodite (Figs 38 B–E, 40 D–H, 41) clearly curved, but its basal half quite stout, unipartite; solenomere (sl) very long, slender and simple, only faintly curved, orifice of seminal groove placed on a small subapical tooth, with neither bacilliform ornamentations, nor accessory seminal chamber, nor a hairy pulvillus. Two large, subunciform processes, m and n, at base of sl, process n lying more dorsally and being slightly larger than a ventral, very finely and densely microspinulate m.

A key to genera of Opisotretidae, based mainly on male characters

A key to species of Martensodesmus

A key to species of Opisotretus