Opisotretus beroni, 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/B0D63E08-C88B-9922-CD25-1F0E4234F273 |
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scientific name |
Opisotretus beroni |
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sp. n. |
Opisotretus beroni ZBK sp. n. Figs 17-21
Type material.
Holotype ♂ (NMNHS), Papua New Guinea, Western Prov., Mount Fugilil, at camp, 2980 m a.s.l., 09.10.1975, leg. P. Beron (British Speleological Expedition).
Paratype.
1 ♀ subadult (19 segments) (ZMUC), same locality, together with holotype; 1 ♂, 1 ♀, 1 ♀ subadult (19 segments) (NMNHS), 1 ♂, 1 ♀ (ZMUM), 1 ♂ (SEM), same locality, Mount Fugilil, summit, 3150 m a.s.l., 29.09.1975, leg. P. Beron (British Speleological Expedition); 1 ♂, 1 ♀ (MNHN JC 339), Western Prov., Finim tel Plateau, Selminum doline, 2300 m a.s.l., forest litter, 02.10.1975, leg. Ph. Chapman & P. Beron (British Speleological Expedition); 1 ♀ (NMNHS), Papua New Guinea: Mount Wilhelm, Lake Pinde, 3480 m, 25.10.1975, leg. P. Beron (British Speleological Expedition); 1 ♂, 1 ♀ (NMNHS), 1 ♀ subadult (19 segments) (SEM), same locality, Mount Wilhelm, from 4260 m a.s.l. (14000 feet) to summit (4694 m a.s.l.), 24.10.1975, leg. P. Beron (British Speleological Expedition).
Diagnosis.
Differs readily fromcongeners by the shorter and bifid apical piece of the gonopod telopodite devoid of a spine level to a short solenomere, coupled with a deeper caudalmost incision of paraterga harbouring the ozopore in poriferous segments.
Name.
Honours Petar Beron (NMNHS), the principal collector of material.
Description.
Length of adults of both sexes ca 10-11 mm, width of midbody pro- and metazona 1.0 and 1.4 mm (holotype), 0.95 and 1.3 mm (♂ paratypes) or 1.1-1.2 and 1.5-1.6 mm (♀ paratypes), respectively. Coloration in alcohol from uniformly pallid to light yellowish.
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 2 when stretched dorsally (Figs 17K, 20A).
In width, collum << segment 2 <3 <head = 4 <5 (6) =15 (♂, ♀), thereafter body gradually tapering towards telson. Paraterga of adults rather strongly developed, considerably smaller and set lower in ♀ subadults (Figs 17J, 19I), starting from collum, mostly subhorizontal to slightly declivous, set high, but always lying slightly below a faintly convex dorsum, with very faint shoulders frontolaterally (Figs 17 A–C). Caudal corner of postcollum paraterga dentiform, narrowly rounded to nearly pointed, extending increasingly behind rear tergal margin only in a few caudalmost segments. Lateral edge of paraterga with 2 or 3 small setigerous indentations in poreless and poriferous segments, respectively. Ozopores evident, round, flush open on dorsal surface, located very close to caudal margin at bottom of caudalmost lateral incision (Figs 17C, L), lateral tooth being considerably shorter than medial one. Collum and each following metatergum with 3+3 very short bacilliform setae arranged in three regular transverse rows; polygonal bosses evident, transverse sulcus superficial (Figs 17 A–F).
Sterna without modifications, rather broad, strongly setose (Fig. 17H). Epigynal ridge very low. Legs rather long, clearly incrassate in ♂ (Figs 17 D–F), ca 1.2-1.3 (♂) or 1.0-1.1 times (♀, juveniles) as long as midbody height; femora and tarsi longest, subequal in length; sphaerotrichomes missing, but ♂ prefemora and femora beset with short spiniform setae ventrally (Fig. 20B).
Gonopod telopodite (Figs 18 B–D, 20C, D, 21) only slightly curved, unipartite, rather long and slender; apical piece (a) distal to a very short solenomere (sl) elongate, more strongly curved, clearly bifid, on caudal face with a few to several denti- or spiniform ornamentations, but devoid of a strong parabasal spine level to sl. An accessory seminal chamber at base of sl evident, crowned with a hairy pulvillus.
Remarks.
The gonopod structure of this new species has already been illustrated by mistake elsewhere ( Golovatch et al. 2010, figs 78 & 80), in connection with documenting the record of Solaenaulus butteli in Papua New Guinea. The same drawings (Fig. 21) are reproduced here again.
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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