Otostigmus punctiventer Tomosvary 1885
Creators: name: Lewis, John G. E.
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Chilopoda
Scolopendromorpha
Scolopendridae
Otostigmus
Otostigmus punctiventer

description: Otostigmus punctiventer (Tömösváry, 1885)
(Figs 20–26)
Branchiostoma punctiventre Tömösváry, 1885: 66 Tab. 4, figs 17, 18. Borneo (Sarawak) Otostigma punctiventre: Haase, 1887: 72 Taf. 4, fig 73.
nec Otostigmus punctiventer: Pocock 1898a: 61. New Britain, Papua New Guinea. Otostigmus punctiventer: Kraepelin, 1903: 114 (in part).
Otostigmus (O.) punctiventer: Attems, 1930a: 142, fig. 173 (in part).
nec Otostigmus (O.) punctiventer: Lewis, 1982: 394, figs 17–21. Sarawak.
Otostigmus (O). spinosus: Lewis, 1982: 395, figs 25–31 (nec Porat 1876). Sarawak. The following records probably refer to O. astenus
Otostigmus punctiventer: Kraepelin, 1904: 246. Sumatra, Indonesia; Philippines. Otostigmus punctiventer: Attems, 1915: 4. Ceram, Indonesia; Waigeu, Irian Jaya, Indonesia. Otostigmus punctiventer: Chamberlin, 1920: 14. Dutch New Guinea [Irian Jaya]. Otostigmus punctiventer: Attems, 1930 b: 175. Sumbawa and Flores, Indonesia. Otostigmus punctiventer: Chamberlin, 1939: 3. New Guinea [Irian Jaya]; Sumatra. Otostigmus punctiventer: Chamberlin, 1944: 2. Dutch New Guinea [Irian Jaya]; Sumatra.
Diagnosis (based on the types and O. spinosus sensu Lewis (Lewis, 1982)). Antennomeres 19 to 21 (22), the basal 2.0 to 2.3 glabrous. Coxopleuron with 3+3 main teeth (atypically 4+4). Tergites with spinules/tubercles (rarely absent) and with very small elongated pits in large specimens. Sternites with very short paramedian sutures occupying anterior 20 to 27% of each and with four depressions. Sternite 21 with sides parallel or slightly converging posteriorly. Coxopleuron with two apical, two lateral and one dorsal spine. Prefemur of leg 20 with dorsal apical spine. Ultimate leg prefemur with four rows of spines. Two tarsal spurs only on first or up to first five pairs of legs. Legs 20 and 21 with one tarsal spur.
Type material examined. HNHM. Jar 1 305/10 Otostigma punctiventre Tömösváry Borneo, leg Xanthus. Seven syntypes (1–7) 71,59. 56, 56, 56, 50, 61 and 60 mm. Jar 2 868/94 Otostigma punctiventre Töm. Borneo. Three syntypes (8–10) 68, 77 and 49 mm. To avoid any possible future confusion the 71mm specimen from 305/10 is here designated the lectotype. It has been removed to a separate tube. The remaining specimens are paralectotypes.
Composite description. Maximum length 77mm. Antennomeres (19) 20, 21 (22), the basal 2.0 to 2.2 glabrous.
Forcipular coxosternum with 3+3 main teeth. The outer separated from the inner two. The inner tooth with a small subsidiary in most specimens. Process of forcipular trochanteroprefemur with two inner teeth (fig. 20).
Tergites with paramedian sutures complete from (5) 6 or 7. Marginate from 7, 8 or 9. A low weak median ridge on some tergites, with weak longitudinal corrugations from between 7 and 12 to 20 or 21. With small blunt spinules or tubercles from between 7 and 12 to 21 and with a few very small shallow elongated pits from between 7 and 13 to 20 or 21 in six specimens (fig. 21) Tergite 21 (fig. 22) with, or without weak median longitudinal ridge in anterior half and a posterior median depression.
With short paramedian sutures occupying anterior 20–27% of the sternites (fig. 23), absent on anterior sternites in some. With a median depression from between 4 and 7 to 18 or 19, a posterior median depression from between 4 and 9 to 18 or 19 and posterior lateral depressions from between 6 and 15 to 19 or 20. The depressions variable in size and position. Sternite 21 with sides more or less parallel (fig. 24) or converging a little (fig. 25). The posterior border concave.
Coxopleural process of moderate length (fig. 24) with two (rarely one) apical spines, two lateral spines and one dorsal spine. Ultimate leg prefemoral spines (fig. 26): VL 4–5, VM 2–3, M 3–4, DM 2, CS 1.
Leg 1 or 1 and 2 with two tarsal spurs the rest with one. Most specimens lack most legs. Leg 20 with dorsal distal prefemoral spine (absent from the single leg 20 in one specimen).
Remarks. Tömösváry (1885) gave a very brief description of this species. It was re-examined and described in detail by Haase (1887) and Kraepelin (1903), the former noted the spine on the prefemur of leg 20 “Schenkel des vorletzten Beinpaares bedornt”, the latter overlooked it: it was not mentioned in Tömösváry’s (1885) description. Subsequent authors did not realise that the spine was present in O. punctiventer and this led to specimens of O. astenus being identified as O. punctiventer and (in the case of Lewis, 1982) of O. punctiventer being identified as O. spinosus. One of Lewis’s (1982) specimens lacks tergite spinules which he suggested might be a female secondary sexual character but this seems unlikely.
The two specimens from Sarawak identified as O. punctiventer by Lewis (1982) lack dorsal coxopleural spines, there is no prefemoral spine on leg 20 and the ultimate legs are missing, so they cannot be identified.
Distribution. Sarawak, Malaysia. Probably also from Indonesia, Papua New Guinea and the Philippines.
description: Published as part of Lewis, John G. E., 2010, A revision of the rugulosus group of Otostigmus subgenus Otostigmus Porat, 1876 (Chilopoda: Scolopendromorpha: Scolopendridae), pp. 1-29 in Zootaxa 2579 on pages 12-14, DOI: 10.5281/zenodo.197572