Opisotretus deharvengi, Golovatch, Sergei I., Geoffroy, Jean-Jacques, Stoev, Pavel & Spiegel, Didier Vanden, 2013
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publication ID |
https://dx.doi.org/10.3897/zookeys.302.5357 |
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persistent identifier |
https://treatment.plazi.org/id/3A97BC7D-988C-A66C-D114-A9E23E7A8A28 |
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scientific name |
Opisotretus deharvengi |
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sp. n. |
Opisotretus deharvengi ZBK sp. n. Figs 24, 25
Type material.
Holotype ♂ (MZB), Indonesia, Sulawesi Selatan, Bone (Watampone), Taccipi, Cave GuaKarabice, inside cave, hand collection, 30.07.1989, leg. L. Deharveng (SULS-068).
Paratype.
1 ♀ (SEM; MNHN JC 341), same locality, together with holotype.
Diagnosis.
Differs readily fromcongeners both by tergal sculpture and lateral paratergal incisions being rather poorly developed, coupled with the presence of a short solenomere and a peculiar ornamentation in the apical piece (a) of the gonopod telopodite.
Name.
Honours Louis Deharveng, the collector.
Description.
Length of holotype ca 9 mm, width of midbody pro- and metazona 0.7 and 1.0 mm, respectively. Coloration in alcohol uniformly pallid.
Body with 19 (♂) or 20 (♀) segments. All characters like in Retrodesmus cavernicola sp. n., except as follows.
Antennae broken off, but likely long and slender.
In width, collum << segments 2-4 <5 <6=15 <head (♂); after 15th, body gradually tapering towards telson. Paraterga strongly developed, starting from a kidney-shaped collum, mostly subhorizontal, largely set high, almost level to (♂) or only very slightly below a weakly convex dorsum (♀), with faint shoulders frontolaterally (Figs 24 A–C). Caudal corner of postcollum paraterga dentiform, always narrowly rounded and extending increasingly well behind rear tergal margin only in segments 16-18 (19). Lateral edge of paraterga with 2 or 3 small setigerous indentations in poreless and pori-ferous segments, respectively. Ozopores evident, round, flush open on dorsal surface, located very close to caudal margin at bottom of caudalmost lateral incision (Fig. 24B, C, I, K), lateral tooth being only slightly shorter than medial one. Collum and each following metatergum with 3+3 long bacilliform setae arranged in three regular transverse rows; polygonal bosses flat, but visible (Figs 24 A–F).
Legs long and very slender (Fig. 24M), ca 2.0-2.1 (♂) or 1.5-1.6 times (♀) as long as midbody height; ♂ prefemora not incrassate, femora and tarsi longest, subequal in length, but tarsi especially slender; sphaerotrichomes or other modified setae missing.
Gonopod telopodite (Fig. 25) clearly curved, unipartite, long and slender; apical piece (a) distal to a short solenomere (sl) rather long due to a terminal uncus (u) bearing near its base a strong subcaudal spine (sp) and a short field of subspiniform, mostly curved ornamentations. An accessory seminal chamber at base of sl evident, crowned with a hairy pulvillus.
Remarks.
This is the first formal encounter of an Opisotretus species in Sulawesi, Indonesia. Due to its long legs and uncoloured tegument, Opisotretus deharvengi sp. n. is likely to represent a troglobite. Opisthoporodesmus bacillifer , the only other opisotretid known from Sulawesi, differs readily in having only two, not three, lateral incisions on the paraterga ( Carl 1912).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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