Annamina irinae, Golovatch, Sergei I., Geoffroy, Jean-Jacques & Akkari, Nesrine, 2017

Golovatch, Sergei I., Geoffroy, Jean-Jacques & Akkari, Nesrine, 2017, Revision of the Vietnamese millipede genus Annamina Attems, 1937, with descriptions of three new species (Diplopoda, Polydesmida, Paradoxosomatidae), ZooKeys 669, pp. 1-18 : 3-4

Annamina irinae sp. n. Figs 8, 9

Type material.

Holotype ♂, ZMUM ρ 3548, Vietnam, Gia Lai Prov., Kon Ka Kinh National Park, N 14°12'43.4", E 108°18'57.1", 930 a.s.l., humid leaved tropical forest in river valley, beaten from bush, V.2016, leg. I.I. Semenyuk. Paratypes: 2 ♂♂, ZMUM ρ 3549, same locality and habitat; 1 ♂, ZMUM ρ 3550, same locality artificial Pinus cf. kesia plantation, V.2016, leg. I.I. Semenyuk.

Name.

Honours Irina Semenyuk, the collector.

Diagnosis.

Differs from other species of the genus primarily by the presence of a small ventral lobe and a large mesal lobe on the gonopod femorite, coupled with a small, simple, mesal process, a long, spiniform, lateral process and a prominent, simple, unciform, acuminate, apical process in the postfemoral portion of the gonopod. See also Key below.

Description.

Measurements (mm): Body length of all types ca 24, width of midbody pro- and metazona 1.5 and 1.9, respectively.

General coloration in alcohol light brownish to brown, but with a characteristic pattern of a vague, lighter, subtriangular, central spot on each postcollum metatergum flanked on each side by marbled brown patches fused into a complete transverse band in anterior 1/3; sides mostly brown to light brown, lighter closer to coxae; strictures between pro- and metazonae, paraterga both dorsally and ventrally, telson, legs and venter pale yellowish to whitish (Fig. 8). Antennae nearly pallid, only distal parts of antennomeres 2-5 slightly infuscate, light brown; entire antennomeres 6 and 7 brown; tip of antennae contrasting pallid.

All characters (see Figs 8, 9) as in A. xanthoptera , except as follows.

In width, segments 5-16> head> 2> collum = 3 = 4 (♂); body gradually tapering towards telson on segments 17-19 (Fig. 8 B–D). Caudal corner of paraterga clearly drawn behind rear tergal margin on segments 16-19. Transverse sulci thin, slightly sinuate medially, finely beaded at bottom, fully developed on segments 5-17, weaker on segment 18, absent from 19th. Tergal setae ca 1/4 as long as metatergum, mostly abraded, often untraceable even as insertion points, pattern 2+2 in a transverse fore row. In length, midbody femora> tarsi> postfemora> coxae = prefemora = tibiae (Fig. 8 B–D).

Gonopods (Figs 8E, 9) relatively complex; coxite (cx) moderately setose distoventrally; telopodite consisting of a short prefemoral (= densely setose) part set off from femorite (fe) by an oblique sulcus; femorite (fe) stout, distinctly flattened dorsoventrally, set off from acropodite by a subtransverse postfemoral sulcus (su), with a smaller, rounded, hyaline, ventral lobe (vl) and a much larger, parabasal, somewhat ear-shaped, mesal lobe (ml); seminal groove quickly moving laterad to mostly lie on dorsal side of fe before passing onto a short, free, flagelliform solenomere (sl) near su, with a small finger-shaped mesal process (mp) lying at base of sl; postfemoral part consisting of a large, spiniform, slightly curved, acuminate, apical process (a) flanked by a considerably shorter, likewise spiniform and slightly curved lateral process (lp) and a short, stout, ventral, trifid tooth (t) (= solenophore) subtending the basal half of sl.