Carlotretus triramus, Golovatch, Sergei I., Geoffroy, Jean-Jacques, Stoev, Pavel & Spiegel, Didier Vanden, 2013

Golovatch, Sergei I., Geoffroy, Jean-Jacques, Stoev, Pavel & Spiegel, Didier Vanden, 2013, Review of the millipede family Opisotretidae (Diplopoda, Polydesmida), with descriptions of new species, ZooKeys 302, pp. 13-77 : 56-64

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