Otostigmus greggi Chamberlin, 1944

Lewis, John G. E., 2014, A review of the orientalis group of the Otostigmus subgenus Otostigmus Porat, 1876 (Chilopoda: Scolopendromorpha: Scolopendridae), Zootaxa 3889 (3), pp. 388-413 : 395

Otostigmus greggi Chamberlin, 1944

( Figs 27–29 )

Otostigmus greggi Chamberlin, 1944a , 180. New Hebrides [ Vanuatu].

Material examined. FMNH. Holotype Otostigmus greggi , New Hebrides, Hog Harbor, Espirito Santo [ Vanuatu]. 15 April 1928. (?) Corane Field Museum Expedition. Holotype.

Description. (Chamberlin’s (1944a) data in parentheses where relevant). Length 42.5mm (49). Antennal articles 21+20[r], the basal 2.2 glabrous. Forcipular coxosternal tooth-plates with 5+5 teeth, three principal ones and small medial and lateral subsidiary teeth ( Fig. 27 ). Forcipular trochanteroprefemoral process with two medial denticles ( Fig. 28 )

Tergites without keels or spines, paramedian sutures complete from 5, marginate from 9. Sternite paramedian sutures not visible on anterior sternites, occupying anterior 33% on S10 and 44% on S18. Sternite of ultimate legbearing segment with sides converging only slightly, posterior margin slightly concave ( Fig. 29 ).

Coxopleuron elongated with two apical and one subapical spine, one or two lateral and a dorsal spine (no spine on dorsal surface) ( Fig. 29 ).

Leg 1 with a femoral spur, a tibial spur on legs 1–3, two tarsal spurs on legs 1–10 or 1–11, one on 11 or 12–20. Ultimate leg prefemoral spines, right leg with VL 4, VM 2, M 3 DM 2 CS1. The left (possibly regenerated) with only VL 2 [very small] VM 0, M 3, DM 2, CS 1.

Remarks. Chamberlin (1944a) described the coxopleuron of this species as “terminating in three spines; two lateral spines and none on dorsal surface” and so it should belong to the orientalis group. However a reexamination of the holotype has shown a dorsal spine to be present and so the species is a member of the rugulosus group of species. The specimen runs down to O. astenus ( Kohlrausch, 1878) in Lewis’s (2010) key and agrees with his diagnosis. Otostigmus greggi is a junior subjective synonym of O. astenus .

Figures

FIGURES 27 – 29. Otostigmus greggi Holotype. 27. Forcipular coxosternal tooth-plates. 28. Left forcipular trochanteroprefemoral process. 29. Sternite of ultimate leg-bearing segment and left coxopleural process. FIGURES 30 – 31. Otostigmus kashmiranus Holotype. 30. Forcipular coxosternal tooth-plates (after Lewis, 1992). 31. Sternite 10 (after Lewis, 1992). FIGURES 32 – 37. Otostigmus loriae HNHM. 32. Antennal article 2 & 3 dorsal (somewhat foreshortened). 33. Forcipular coxosternal tooth-plates. 34. Tergite 16. 35. Ultimate tergite. 36. Ultimate leg-bearing segment ventral. 37. Detail of left coxopleural process. Scale bars = 1.0 mm except Figs 27, 28, 30 & 37 = 0.5 mm.