Attemsostreptus cataractae Enghoff & Ngute & Kwezaura & Laizzer & Lyatuu & Mhagawale & Mnendendo & Marshall 2024, sp. nov.
Creators: name: Enghoff, Henrik
name: Ngute, Alain S. K.
name: Kwezaura, Revocatus L.
name: Laizzer, Richard L.
name: Lyatuu, Herman M.
name: Mhagawale, Waziri
name: Mnendendo, Hamidu R.
name: Marshall, Andrew R.
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Diplopoda
Spirostreptida
Spirostreptidae
Attemsostreptus
Attemsostreptus cataractae

description: Attemsostreptus cataractae Enghoff sp. nov.
urn:lsid:zoobank.org:act: 7D1B998B-D832-4821-88FF-B2F7904B3083
Figs 2, 8
Diagnosis
Differs from congeners, except A. costatus, by the very long (> half length of gonopod coxa), only moderately curved and almost straightly laterad lateroapical metaplical process (lap). Differs from A. costatus by a somewhat shorter lap and by the lack of a distinct, rounded mesapical metaplical process (map) – compare Fig. 8D with fig. 1 in Akkari & Enghoff (2019).
Etymology
A Latin noun in the genitive, meaning ‘of the waterfall’ and referring to the type locality. The name was suggested, but never published, by Richard L. Hoffman (1927–2012), great American myriapodologist.
Material examined (total 1 ♂, 1 ♀)
Holotype
TANZANIA • ♂; Morogoro Region, Kilombero District, base of Sanje Falls, Mwanihana Forest Reserve; Apr. 1984; K.M. Howell leg.; VMNH 112021.
Paratype
TANZANIA • 1 ♀; same collection data as for holotype; VMNH 112022.
Description (male)
SIZE. Length unknown (specimen in several pieces, collum and rings 2–6 missing). Diameter 4.2 mm. 54 podous rings (including 1–6), no apodous rings in front of telson.
COLOUR. After 39 years in alcohol antennae, legs and head below antennae yellowish; head between antennae brown, marbled in upper part. Collum marbled brown, with brown anterior band expanded in middle. Body rings faded to whitish tallow except for amber-coloured posterior ¼ of metazonites.
HEAD. Eyes each with ca 30 ommatidia in ca 12 vertical and 5 horizontal rows, extending just mesad of antennal sockets. Antennae (presumably) reaching back to ring 4 when stretched.
COLLUM. With three strong complete carinae, otherwise unornamented, resembles Fig. 9A; lateral lobes slightly expanded.
BODY RINGS (Fig. 8A–C). Anterior part of prozonites with dense transverse microsculpture which posteriorly gives way to an at first irregular, then regular cell structure; in dorsal part of ring, surface of last cell row coarsely pitted. Metazonites slightly vaulted, carinate throughout; in dorsal part of ring surface between ridges coarsely pitted. Suture between pro- and metazonites simple, straight. Ozopores (oz) between two ridges, in middle of metazonite. No sigilla.
TELSON. Similar to that of A. reflexus (Fig. 4B–D).
LEGS (leg-pairs 1–7 missing). 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.
GONOPOD COXA (Fig. 8D–E). Slender, parallel-sided. Proplica (pp) apically punctate and slightly expanded, apical margin oblique, fitting under metaplical roof (mr), mesally ending in acute-angled process. Metaplica (mp) without distomesal spine; apically bent over and forming a ‘roof’ (mr) over the gonocoel; mesally slightly produced into poorly defined mesapical process (map); laterally forming a very long (>half length of entire coxa) slender process (lap); process directed laterad, almost straight except for ‘downwards’-bent tip.
GONOPOD TELOPODITE (Fig. 8D–G). With a very long, slender, pointed antetorsal process (atp) in the shape of a large hook. Post-torsal part of telopodite very slender, directed basad, describing a loose 360° spiral, extending past base of coxa where it makes a 180° turn such that the last part is directed apicad; tip divided into lamellar, slightly serrate process (sl) and pointed solenomere (slm).
Descriptive notes (female)
Length 75 mm. Diameter 5.5 mm, 54 podous rings, no apodous ring in front of telson. Lateral lobes of collum not expanded. Other non-sexual characters as in male.
Distribution and habitat
Known only from the type locality; “base of Sanje Falls” could be anywhere between 300 and 500 m a.s.l.
description: Published as part of Enghoff, Henrik, Ngute, Alain S. K., Kwezaura, Revocatus L., Laizzer, Richard L., Lyatuu, Herman M., Mhagawale, Waziri, Mnendendo, Hamidu R. & Marshall, Andrew R., 2024, A mountain of millipedes XI. The trachystreptoform spirostreptids of the Udzungwa Mountains, Tanzania (Diplopoda, Spirostreptida, Spirostreptidae), pp. 1-50 in European Journal of Taxonomy 918 (1) on pages 13-15, DOI: 10.5852/ejt.2024.918.2405, http://zenodo.org/record/10554532