Lipseuma josianae, Golovatch & Geoffroy & Mauriès, 2006

Golovatch, Sergei I., Geoffroy, Jean-Jacques & Mauriès, Jean-Paul, 2006, Four new Chordeumatida (Diplopoda) from caves in China, Zoosystema 28 (1), pp. 75-92 : 86-90

publication ID	https://doi.org/ 10.5281/zenodo.5393502
DOI	https://doi.org/10.5281/zenodo.5469449
persistent identifier	https://treatment.plazi.org/id/03FEF24B-A97E-6A42-FCB7-FD9F1D30C7C1
treatment provided by	Marcus
scientific name	Lipseuma josianae
status	sp. nov.

Treatment

Lipseuma josianae View in CoL n. sp.

( Figs 5 View FIG ; 6 View FIG )

TYPE MATERIAL. — Holotype: China, Hubei Prov., Banqiao County, Cave Chuan Dong Zi, Nos. 482, 485, 494, 9.VIII.1999, leg. J. & B. Lips, ♂ ( MNHN DA155 About MNHN ). Paratypes: same locality, 1 ♂ ( MNHN DA155 About MNHN ) ; 1 ♂, 2 juvs ( MNHN DA155 About MNHN ) ; ♀ ( MNHN DA155 About MNHN ) ; 2 juvs ( MNHN DA155 About MNHN ) .

ETYMOLOGY. — To honour Josiane Lips.

DIAGNOSIS. — Differs from the only congener ( L. bernardi n. gen., n. sp.) by the slightly larger size, as well as in certain details of leg and gonopod structure.

DESCRIPTION

Length 9.3-9.8 (♂) to 10.1 mm (♀); width of midbody segments, 0.75-0.8 (♂) to 0.9 mm (♀), maximum width of head, 0.95 mm (holotype). Vertical diameter of midbody segments, 0.75 (♂) to 0.88 mm (♀). Coloration entirely pallid.

Head width >> collum> segment 2> 3> 4> 5> 6> 7> 8> segment 9 = 18; thereafter body very gradually tapering toward telson.

Body with 28 segments (46 leg-pairs). Head sparsely setose, clypeolabral region slightly convex. Eyes completely reduced. Antennae very long and slender ( Figs 5A View FIG ; 6C View FIG ), reaching beyond body segment 6 (♂) or 5 (♀) dorsally; antennomere 7 with a peculiar flattened seta dorsally in distal third; antennomere 8 with four unusually long and slender sensory cones. Gnathochilarium without promentum.

Collum usual, obcordate in shape, with rudimentary paraterga. Tegument smooth, modestly shining, non-areolated, translucid. Metatergal setation 3 + 3, typical, macrochaetae very long, pointed, positioned on minute knobs; exterior macrochaeta longest, c. 0.7 times as short as body width and nearly three times longer than median or interior one; stricture between pro- and metazona very shallow, inconspicuous ( Fig. 5B, C View FIG ).

Paraterga very small dorsolateral shoulders, rather regularly rounded in dorsal view ( Fig. 5C View FIG ), slightly better developed on anterior body third.

CIX (15) ≈ 0.9; MIX (15) = 1.25; MA (15) ≈ 175°; PIX impossible to evaluate as paraterga too poorly developed.

Axial suture distinct, usual; segment 7 inconspicuous, pleurite without ventral apophyses. Pleural crests evident. Limbus invisible.

Legs generally very long and slender, c. 1.8 times as long as midbody height. Legs 1 and 2 slightly reduced as usual, tarsi with usual ventral brushes, but without papillae; male coxa 2 perforated by gonopore orifice. Tarsal papillae absent. Male legs 3-5 unmodified. Male legs 6 ( Fig. 5D View FIG ) exceptionally incrassate, with a distoventral process both on coxa and prefemur; acropodite strongly clasper-like, tarsus with two bulges subventrally and a modified claw. Male legs 7 ( Fig. 5E View FIG ) slightly incrassate, with evidently enlarged coxa and prefemur; coxa with a pointed lobe ventrally. Male legs 10 ( Fig. 6A View FIG ) and 11 normal, both pairs with coxal glands. Claws very long, sabre-shaped, simple.

Anterior gonopods (leg-pair 8) unusually simple, small; coxites with traces of median division basally on caudal face, completely fused on front face; distally subsecuriform telopodites laterocaudal, with a few setae distally, nearly as high as the unpaired, linguiform, distally pilose syncolpocoxite, but somewhat higher than the voluminous angiocoxal sacs with a ridge on top; sternum plate-like, with each lateral bulge on front face supporting a strong seta ( Fig. 5 View FIG F-H).

Posterior gonopods (leg-pair 9) also very simple ( Fig. 6B View FIG ), placed on a plate-like sternum; coxae contiguous medially, each crowned with a simple, long, slender, erect process ventrally; telopodite reduced to a single voluminous segment filled with glandular material.

Female legs 2 normal. Vulva ( Fig. 6D, E View FIG ) very broad; operculum small, devoid of outgrowths.

REMARKS

In one of the male paratypes, leg 6 is normal, not modified, whereas the anterior gonopod syncolpocoxite shows a small median notch apically, but there are no lateral setae on the coxite. Some of these traits are probably anomalous, likely neotenic.