Guipuzcosoma Vicente & Mauriès, 1980

Antić, Dragan & Mauriès, Jean-Paul, 2022, Two new species of the previously monospecific genus Guipuzcosoma Vicente & Mauriès, 1980 from Spain, with establishment of Guipuzcosomatidae fam. nov. (Diplopoda: Chordeumatida), Zootaxa 5093 (2), pp. 142-168 : 146-147

Genus Guipuzcosoma Vicente & Mauriès, 1980

Guipuzcosoma Vicente & Mauriès, 1980: 10 , 12, 13, figs 7–12.

Guipuzcosoma — Mauriès (1986: 251, 252, figs 4–6).

Type species: Guipuzcosoma comasi Vicente & Mauriès, 1980 , by original designation.

Diagnosis. In addition to the above-mentioned combination of characters, the genus Guipuzcosoma clearly differs from all other chordeumatidan genera by very characteristic posterior gonopods whose coxotelopodites have a pair of striking distomesal horns.

Short description. Medium-sized chordeumatidans, with body length 7–10 mm, and with 30 rings (including telson) in adults. Body rings with dorsolateral humps, bearing stout, long and trichoid macrochaetae ( Haasea - type). Head with frontal side slightly concave in males, convex in females, with 12–17 ommatidia. Legs without tarsal papillae. Pregonopodal legs 3–7 not enlarged; coxa 7 with mesal bump, no other peculiarities. Leg-pair 10 in males with coxal sacks and with short triangular trochanteral bumps; leg-pair 11 in males with coxal sacks and with short nippled coxal process. Anterior gonopods: gonopodal sternum poorly developed and poorly chitinized, mainly membranous. Coxites wide in lateral view, with two pairs of angiocoxites, the second pair being twobranched with striking anterior branch composed of a few very long flagelloid processes. Colpocoxites strongly developed, massive, chitinized, only with rounded membranous remnants, distal parts strongly curved anteriad in the form of long horns. Posterior gonopods: gonopodal sternum poorly developed, membranous, only with anterior pair of concave bulges chitinized; coxotelopodites well-developed, massive, looking more robust than the anterior gonopods, distally with long setae, subdistally with pigmented remnants, mesally with two striking horns. Leg-pair 3 in females with sternal lobes. Vulvae unique, with poorly chitinized postgenital membranous structure, strongly developed and wrinkled; mesal valves of bursa completely fused, only with anterior fissure as evidence of former separation, posteriorly forming striking unpaired medial structure.

Distribution. Known only from a few localities in the provinces of Alava, Gipuzkoa and Navarre, northern Spain ( Fig. 12 ).

Figures

FIGURE 12. Distribution of the genus Guipuzcosoma Vicente & Mauriès (1980).