Damacornu transversum gen. et sp. nov.

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Fig. 2

Diagnosis

See generic diagnosis (genus monotypic).

Etymology

The name is a Latin adjective and refers to the transverse yellow markings on the body rings.

Material studied (total: 1 ♂)

Holotype

TANZANIA: ♂, Iringa Region and District, Ndekwa village, Mt Nyumbenito, Udzungwa Mountains, 1400 m a.s.l., 4 Apr. 1982, Jan Kielland leg. (VMNH).

Description

Male

SIZE. Length? (broken). Body diameter 6.4 mm. 60 podous body rings, no apodous rings in front of telson.

COLOUR. After 35 years in alcohol blackish, anterior part of head and posterior part of metazona amber; a transverse yellow band on prozona extending from midline ca. halfway down to ozopores; legs yellow.

HEAD. Without peculiarities. Four supralabral setae.

COLLUM. With a marginal furrow, followed by two abbreviated and one complete submarginal furrow.

BODY RINGS. Almost perfect cylinders, not vaulted; suture straight; ozopores starting from ring 6, placed ca ⅓ of metazona length behind suture. 18–22 metazonital striae reaching up to ca one metazonite length below ozopore.

ANAL VALVES. With a well-developed dorsal tooth and a small ventral one; margin barely raised, setiferous tubercles inconspicuous.

LIMBUS (Fig. 2A). Divided into simple, pointed teeth, each tooth>3 times longer than broad.

MALE LEGS. With adhesive pads on postfemur and tibia.

GONOPOD COXA (Fig. 2E–G). Proplica (pp) (Fig. 2G) narrow, parallel-sided, ending in a small proplical lobe (ppl), distal to ppl continuing as a large, irregularly rhomboidal plate (rhp); disto-mesal corner of rhp drawn out into blunt triangular process. Metaplica (mp) with large metaplica flange (mf) covering base of proplica in mesal view (Fig. 2F), with bowl-shaped shelf (ms) slightly basal to level of proplical lobe, distal margin of shelf continuing distad as longitudinal ridge (mr1); another longitudinal ridge (mr2) parallel to mr1, close to lateral margin of coxa; a small denticle (ld) on lateral margin ca ⅓ from base (Fig. 2E); lateral surface of coxa concave.

GONOPOD TELOPODITE (Fig. 2B–D, H–I). Arculus 90°. Torsotope (tt) simple, compact, with a long spine (pts, “Femoraldorn” sensu Kraus 1960, “Praefemoraldorn” sensu Kraus 1966) (Fig. 2B–C). Post-torsal narrowing (pn) pronounced, without processes or spines (Fig. 2B). Telopodite just distal to post-torsal narrowing dividing into slender, whip-like solenomere and lamellate telomere. Solenomere (slm) (Fig. 2B) with a long, straight basal spine (ps), otherwise without any outgrowths, apically fluted and spiraled (Fig. 2I). Telomere consisting of a single, longitudinally folded lamella. Proximal half of telomere roughly parallel-sided, continuing in same direction as torsotope and post-torsal narrowing; a small hook-shaped process (tlh) (Fig. 2C, H) originating from anterior external surface; distal half of telomere set off by 90° angle, posterior margin of distal half first forming large rounded lobe (tll) (Fig. 2C), in distal part irregularly serrate; a row of coarse teeth (tlt) on internal surface of terminal process of telomeral lamella (Fig. 2D).

STERNUM OF RUDIMENTARY NINTH LEG- PAIR (Fig. 2J). Heart-shaped.

Female

Unknown.

Distribution

Known only from Mt. Nyambanito (Nyumbenito), 1400 m a.s.l.