Otostigmus brevidentatus Verhoeff 1937
Creators: name: Lewis, John G. E.
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Chilopoda
Scolopendromorpha
Scolopendridae
Otostigmus
Otostigmus brevidentatus

description: Otostigmus brevidentatus Verhoeff, 1937
(Figs 12–20)
Otostigmus (Otostigmus) brevidentatus Verhoeff, 1937, 212, Pl. 13, Fig. 8. Malacca [Melaka] Malaysia. Otostigmus brevidentatus: Verhoeff, 1942, 185 (in key).
Diagnosis. Length 39 mm. Antennal articles 20, the basal 2.75 glabrous. Forcipular coxosternal tooth-plates with 11+8 small teeth. Tergites with paramedian sutures, marginate from 8, without keels or spinules. Paramedian sutures occupying anterior 50% of sternite. Coxopleuron with three apical and one lateral spine. Legs 1–19 with one tibial and two tarsal spurs. Ultimate leg prefemur with four spines in proximal half and a corner spine. Ultimate leg without tarsal spur.
Material examined. ZSM. Holotype on two slides, the first with head, antennae, mandibles, maxillae and first six segments, the second with segments 19, 20 and 21, one ultimate leg and one leg 20 (detached). Trunk segments 7 to 18 missing. Labelled Otostigmus brevidentatus Verh. [Plus Valley, Kuala] Perak, Malakka.
Description. (Verhoeff’s (1937) data in parentheses where relevant). Length 39 mm. Antennal articles 19[r]–20, the basal 2.75 glabrous dorsally (Fig. 12), 2.4 ventrally (2 2/5 almost glabrous). Second maxillae with a poorly developed spur on article 2 (Fig. 13). Accessory spine present on right pretarsus (Fig. 14), left pretarsus reduced (Fig. 15). Forcipular coxosternal tooth-plates very wide and low, ratio of width to length 2.5:1 with 11+8 small teeth (Fig. 16). The dorsal surface with about 16+20 setae only seen as this is a cleared specimen. Right forcipular trochanteroprefemoral process with six small lenticular denticles (Fig. 17), the left with two (Fig. 18).
(Tergites with paramedian sutures, marginate from 8 otherwise smooth. Paramedian sutures occupying anterior 50% of sternites). Right coxopleural process damaged and repaired with one lateral spine, the left with three apical, one very small lateral and no dorsal spine (Fig. 19) (3 end spines and one “oben” by which is meant anterior to).
First pair of legs missing, 2 to 6 and 19 with one tibial and two tarsal spurs, 20 and 21 without. (Legs 1 to 18 with two tarsal spurs, 19 to 21 without these, anterior legs with tibial spurs). Ultimate leg prefemur with VL 2, VM 2 spines in proximal half and a corner spine (Fig. 20) (with only four spines).
The spiracles of segments 3 and 5 very small and apparently without tracheae as compared to the spiracle of segment 20 which has relatively extensive tracheae.
Remarks. Verhoeff (1937) noted that O. brevidentatus runs down to O. multidens in Attems’ (1930) from which he differentiated it by the higher number of coxopleural teeth (incorrect) and ultimate legs with four as compared to 7–12 prefemoral spines in O. multidens. It has, in fact, four plus a corner spine as opposed to (6) 7–12 plus a corner spine in the O. multidens.. Otostigmus brevidentatus certainly appears to be closely related to O. multidens. It may be differentiated by having only four prefemoral spines plus a corner spine, the forcipular trochanteroprefemoral process denticles and possibly a different nature of the forcipular coxopleural tooth-plates. These are, however, only known from the specimen mounted in Canada Balsam. It is here regarded as a separate species.
description: Published as part of Lewis, John G. E., 2014, A review of the orientalis group of the Otostigmus subgenus Otostigmus Porat, 1876 (Chilopoda: Scolopendromorpha: Scolopendridae), pp. 388-413 in Zootaxa 3889 (3) on page 393, DOI: 10.11646/zootaxa.3889.3.3, http://zenodo.org/record/224919