Attemsostreptus costatus Verhoeff, 1941

Akkari, Nesrine & Enghoff, Henrik, 2019, Revision of the genus Attemsostreptus Verhoeff, 1941 with description of a new species from Tanzania and notes on the tribe Trachystreptini Cook, 1896 (Spirostreptida, Diplopoda), European Journal of Taxonomy 575, pp. 1-12 : 3

Attemsostreptus costatus Verhoeff, 1941

Fig. 1

Attemsostreptus costatus Verhoeff, 1941: 262–263 , plate 12, figs 35–36.

Lophostreptus orobius Kraus, 1958: 11–12 , plate 3, figs 30–34. syn. nov.

Attemsotreptus orobius Krabbe 1982: 252–253 , fig. 185.

Material examined

Attemsostreptus costatus Verhoeff, 1941 types (ZSM), 4 micro-preparations of 2 ♂♂ and 1 juvenile ♂.

TANZANIA • 1 ♂, juvenile, gonopods, 3 sections of a tergite; ZSM A 20042783 • ♂ legs 1–7, gnathochilarium, labrum; ZSM A 20042784 • ♂, gonopod in one block; ZSM A200427814 • 1 ♂, gonopods separated in left and right, left and right telopodites, two leg-pairs attached to a portion of sternite; ZSM A 20042785 .

Descriptive notes on gonopods

STERNUM (st). Small and simple, lower than paracoxite (px).

COXA. Proplica (pp) simple, straight and broad, distally with scattered bristles. Metaplica (mp) with a deep mesoapical incision, a rounded mesoapical metaplical process (map) and a long twisted and downturned lateroapical metaplical process (lap). The latter (lap) pointing proximolaterad and ending in claw-like pointed apex.

TELOPODITE. With a thin and curved antetorsal process (atp) ending in a pointed apex, post-torsal part forming a loop at mid-length, narrowing towards apex, apex bifurcate with a thin serrated lamella (sl) and an acuminate apical process.

Comments

Verhoeff (141: 263, pl. 12, fig. 36) described serrations on the margins of the ‘solenomere’ and three projections at the apex of the ‘telomere’. The descriptions and drawings of Krabbe (1982: 252 fig. 185) and Kraus (1985: 1–12, figs 30–34) match our observations.

Figures

Fig. 1. Attemsostreptus costatus Verhoeff, 1941, type material ZSM. A. Gonopods, anterior view. Aa. Overview of slide A 200427814, containing the gonopods. B. Slide A20042785, left gonopod, anterior view. C. Telopodite. D–G. Overview of Verhoeff’s slides (ZSM) A20042785, A20042783, A20042784, A20042785. For abbreviations, see Material and methods. Aa, D–G photo credit J. Spelda. Scale bars: A–C = 0.5 mm; Aa, D–G: images not to scale.