Attemsostreptus leptoptilos Enghoff sp. nov.

urn:lsid:zoobank.org:act: 34AAD11B-3CA4-44FA-8E21-A13047FC01BC

Figs 2, 3D, 12–13

Diagnosis

Differs from congeners, except A. julostriatus sp. nov., by the relatively short (<half length of gonopod coxa), pronouncedly basad lateroapical metaplical process (lap). Differs from A. julostriatus, by having fewer podous rings (48 vs 58–62), by having the metazonites carinate as in other trachystreptoform spirostreptids, vs striate as in species of Julidae, and by having the mesapical coxal spines (mcs) much longer and pointing distomesad, vs very short and pointing distad.

Etymology

Leptoptilos is the name of the genus to which the African marabou stork belongs; here it refers to the somewhat marabou-like profile of the gonopod coxa of the new species. Noun in apposition.

Material studied (total 4 ♂♂, 5 ♀♀)

Holotype

TANZANIA • ♂; Iringa Region /District, Nyambanitu Mountains, Ukami Forest; 07°42′49″ S, 36°25′15″ E; Jul.–Nov. 1984; D. Moyer leg.; NHMD 621876.

Paratypes

TANZANIA • 3 ♂♂, 5 ♀♀; same collection data as for holotype; NHMD 621877.

Description (males)

SIZE. Length ca 58 mm, diameter 3.7–4.1 mm, 48 podous rings, no apodous rings in front of telson.

COLOUR. After 39 years in alcohol head, antennae and collum brown; head becoming yellowish brown towards clypeal margin; collum marbled except for solid brown band along anterior margin, band expanded in the middle. Body rings and telson (faded to?) grey, except for amber-coloured posterior ⅓ of metazonites and brown lips of anal valves. Legs yellowish brown.

HEAD (Fig. 12A–B). Eyes each with ca 30 ommatidia in ca 12 vertical and 5 horizontal rows, extending just mesad of antennal sockets. Antennae reaching back to ring 5 when stretched.

COLLUM (Fig. 12B). With two deep, complete lateral carinae and short carinae along hind margin along entire perimeter. Lateral lobes slightly expanded.

BODY RINGS (Fig. 12D–G). Anterior part of prozonites with dense transverse microsculpture which posteriorly gives way to an at first irregular, later regular cell structure; in dorsal part of ring surface of last cell row coarsely pitted. Cuticular scutes (“cytoscutes”) of anterior part of prozonite remarkable in being rounded rather than polygonal and being arranged in an imbricate pattern (Fig. 12G, left inset). Metazonites vaulted, carinate throughout; anterior part of ridges with fine moniliform sculpture (Fig. 12G, right inset); in dorsal part of ring surface between ridges coarsely pitted. Suture between proand metazonite simple, straight. Ozopores between two ridges, slightly behind middle of metazonite. No sigilla.

TELSON (Fig. 12C, H–I). As in A. reflexus and A. cataractae sp. nov.

LEGS. Length ca 0.9 ×body diameter. Postfemora and tibiae with ventral pads; pads decreasing in size towards posterior and absent from last pairs of legs. First pair (Fig. 13A–B) similar to those of A. reflexus, but tip of prefemoral lobes (pfl) more rounded.

GONOPOD COXA (Fig. 13C). As in A. julostriatus sp. nov., but distomesal spine (mcs) of metaplica long (as in A. reflexus).

GONOPOD TELOPODITE (Fig. 13D–F). As in A. cataractae sp. nov. and A. julostriatus sp. nov.

Descriptive notes (females)

Length unmeasurable, all females broken. Diameter up to 4.8 mm. One specimen with 48 podous rings, no podous rings in front of telson. One subadult specimen (diameter 3.7 mm) with 46 podous +1 apodous ring. Remaining specimens broken. Lateral lobes of collum not expanded. Other non-sexual characters as in male.

Disribution and habitat

Known only from the type locality. Ukami Forest lies at 1000–1600 m elevation on steep and rocky terrain (Fjeldså et al. 2010)