Lophostreptus neglectus, Enghoff & Akkari, 2024
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publication ID |
https://dx.doi.org/10.3897/zookeys.1188.115802 |
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publication LSID |
lsid:zoobank.org:pub:CA455F3B-B115-4A2C-A25F-A32E5B4C8998 |
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persistent identifier |
https://treatment.plazi.org/id/2BF66A14-5F02-4BEB-AE55-72AF29565ABF |
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taxon LSID |
lsid:zoobank.org:act:2BF66A14-5F02-4BEB-AE55-72AF29565ABF |
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treatment provided by |
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scientific name |
Lophostreptus neglectus |
| status |
sp. nov. |
Lophostreptus neglectus sp. nov.
Figs 1 View Figure 1 , 2 View Figure 2 , 3 View Figure 3
Diagnosis.
Differing from all other species of Lophostreptus of which the male characters are known (see Remarks) by the shape of the distal part of the gonopod coxa.
Etymology.
Named ' Lophostreptus neglectus ' (adjective) because this species remained neglected despite a slide containing its gonopods in Attems’ type material (Fig. 3C View Figure 3 ).
Material examined.
Holotype. ♂, Tanzania, Kilimandjaro, Kibonoto, Stepp-Kulturzon ; 1000-1900 m a.s.l.; Oct. 1905; Y. Sjöstedt leg., NHRS-TOBI 000005630; separated from sample of 2 ♂♂, 6 ♀♀; syntypes (now paralectotypes) of Lophostreptus regularis (NHRS-TOBI 000005480) . Paratype. Tanzania, Kilimanjaro region, Hai district , “Kibonoto”, syntype of Lophostreptus regularis NHMW MY10381, slide “6” (ex NHMW MY 4076). "1. 2. Bp cf Kilimandjaro " gonopods and two pairs of legs. “Kibonoto” [leg. Sjöstedt Y., 1905-1906, & don. Sjöstedt / Attems]" .
Description
(holotype male). Size. Length 33 mm; midbody vertical diameter 2.4 mm; 46 podous rings, no apodous rings in front of telson.
Colour (Fig. 1A-C View Figure 1 ). After more than 100 years in alcohol overall light brown, with a darker hue along metazonital keels, posterior part of metazonites amber. Telson and legs yellowish.
Head (Fig. 1A View Figure 1 ). Vertex densely punctuate, with a clearly demarcated parietal furrow. Eyes not reaching mesal of antennal socket, c. 22 ommatidia in 5-6 horizontal and c. 8 vertical rows. Antennae reaching 3rd body ring. Antenno-meres 3-5 strongly narrowed at base.
Collum (Fig. 1A View Figure 1 ). Not modified for accommodation of antennae, coarsely punctate; along the posterior margin a row of quite short, weak furrows and carinae which towards the sides gradually reach further forwards. Lateral lobes much narrower than the dorsal part, not expanded, traversed by 3 anteriorly strongly ascending carinae/furrows of which the uppermost is the strongest and almost straight, reaching anterior margin above eye level, anterior corner rectangular, posterior corner more rounded, margins straight.
Body rings (Fig. 1B View Figure 1 ). Prozonites (pz) in anterior part (c. half) with very fine ring furrows which further back give place to a cell structure; posterior part (c. 20%) delimited by clear line, with a regular pattern of larger, rectangular cells. The cuticular scutes ( ‘cytoscutes’) of the anterior part of the prozonite are remarkable by being rounded rather than polygonal and by being arranged in an imbricate pattern, as described for several other trachystreptoform species by Enghoff et al. (in press, e.g., fig. 12G, left inset). Suture between pro- and metazonites straight, simple. Metazonites (mz) with faint constriction a little behind suture, with numerous simple keels which reach from suture, across constriction and until posterior ring margin; c. 20 keels between dorsal midline and ozopore. Ozopores (oz) small, a little in front of middle of metazonite. Sigilla not seen.
Telson (Fig. 1C View Figure 1 ). Preanal ring (pr) regularly and densely grainy-rugose. Anal valves (av) overall with same sculpture, strongly vaulted, their mesal margins slightly raised as low rims, smooth, meeting in midline, paralleled more laterally by much higher lips with smooth edge; lips higher than distance between lips and mesal margin; area between mesal margin and lip with weaker sculpture than main part of valve.
Legs. Short, length c. 0.6 × body diameter. No ventral pads. First pair (Fig. 1D, E View Figure 1 ): coxosternum with a few lateral setae (not evident in Fig. 1D View Figure 1 ), mesally with large groups of numerous long setae (cxs) next to prefemoral lobes. Prefemoral lobes (pfl) parallel-sided, c. twice as long as broad, apically broadly rounded, with a field of long setae (dps) extending from tip of process almost to its base.
Gonopod coxa (Fig. 2 View Figure 2 ). Proplica (pp) parallel-sided, apically curving slightly laterad and with a subsemicircular incision separating a broadly rounded lateral process (l) from a triangular mesal one (m). Metaplica (mp) with straight, only very slightly converging margins, hence almost same width throughout, subapically with mesal incision delimiting a smoothly rounded apical part with a semicircular mesapical process (map) and a relatively short, straight, tongue-shaped lateroapical process (lap).
Gonopod telopodite (Figs 2A, B, D View Figure 2 , 3A, B View Figure 3 ). Slender, simple, with a knobby lateral ‘knee’ (kn) shortly after the emergence of the telopodite from the gonocoel, thereafter forming a full circle. Solenomere (slm) flanked by two triangular flanges (tf) and a tongue-shaped process (tp).
Descriptive notes on paratype.
The paratype consists of a complete set of gonopods. Despite the overall poor condition of the slide, these gonopods are obviously identical to those of the holotype.
Remarks.
The gonopods of L. neglectus sp. nov. are clearly different from those of the other Lophostreptus species of which the male is known. The remaining species which are currently assigned to Lophostreptus , but which - due to the lack of gonopod information - may just as well belong to one or more other ‘trachystreptoform’ genera, all seem to be bigger and/or derive from localities far away from Mt. Kilimanjaro.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.