Otostigmus (Parotostigmus) bürgeri monsonus Chamberlin, 1957

Chagas-Jr, Amazonas & Souza, Emerson Marques, 2024, A review of the types of some Otostigmus (Parotostigmus) (Scolopendromorpha, Scolopendridae, Otostigminae) of the Andes mountain range, Zootaxa 5529 (3), pp. 436-460 : 439-441

Otostigmus (Parotostigmus) bürgeri monsonus Chamberlin, 1957 syn. nov.

Figs 7–13

Type material examined. Syntypes CAS (2 specimens), Peru, Monson Valley , Tingo Maria, 9.xii.1954, E.I. Schlinger & E.S. Ross .

Redescription of syntypes. Length: 58 mm from anterior margin of cephalic plate to posterior margin of tergite 21 ( Figs 7, 8 ). Antennae with 20 articles; two basal ones glabrous, the third one glabrous dorsally [three articles glabrous]. Other specimen with 19 articles in right antenna and 21 in left (18 to 21). Cephalic plate smooth, without sutures and depressions, but with a very short slight median sulcus anteriorly [not described]. Cephalic plate wider than long [not described] ( Fig. 9 ). Coxosternal tooth-plate wider than long with 4+4 teeth and a long bristle; coxosternite with a short paired sutures at base of tooth-plates [not described] ( Fig. 10 ). Trochanteroprefemoral process large with the margin with 2 short tubercles and with tip pointed. Tergites smooth; tergites 5–20 [4–19] with complete paramedian sutures; one specimen with tergites 5–21 margined, other specimen from 9–21 [not described]; posterior margin of tergite 21 angled and with slight longitudinal depression posteriorly ( Fig. 11 ). A pair of spiracles in seventh leg-bearing segment ( Fig. 13 ). Sternites smooth. Sternites 2–19 with anterior incomplete short sutures. Sometimes the short sutures are overlapped by posterior border of the preceding sternite, well visible from sternites 5–18. Sternite 21 longer than wide, converging posteriorly, and with posterior border straight or slight concave. Sternites without depression [no described] ( Fig. 12 ). Pores of the coxopleuron of different sizes, and numerous; pore-field covers almost entire coxopleuron, only the posterior end poreless; posterior border of coxopleuron with short protuberance bearing two short spines. One specimen without terminal spines. Legs 1 with one femoral and one tibial spur (in the two specimens); legs 2–16 with two tarsal spurs (other specimen legs 2–19 with two tarsal spurs); sometimes some tarsi between legs 2–19 have one tarsal spur; legs 20 with one tarsal spur and 21 without (other specimen without legs 19, 20 and 21).

Remarks. The syntypes examined are the typical representatives of Otostigminae ; however, the presence spiracles on the seventh leg-bearing segment and spines on the coxopleuron are characteristic for the genus Rhysida Wood, 1862 . The antennae with 20 or 21 antennomeres, tergites 5–20 with complete paramedian sutures, tergites 5– 21 margined, sternites with anterior incomplete short sutures, legs 1–16 (19) with two tarsal spurs, and the prefemur of the ultimate legs without spines fit the diagnosis of Rhysida celeris ( Humbert & Saussure, 1870) . Therefore, O. bürgueri monsonus syn. nov. is considered a junior synonym of R. celeris .

Figures

FIGURES 13. Otostigmus (P.) bürgeri monsonus Chamberlin, 1957 syn. nov. Syntype CAS. 13. Leg-bearing segments 7 and 8, showing the spiracles (lateral view).

FIGURES 7–8. Otostigmus (P.) bürgeri monsonus Chamberlin, 1957 syn. nov. Syntype CAS. 7. General view dorsally. 8. General view ventral.

FIGURES 9–12. Otostigmus (P.) bürgeri monsonus Chamberlin, 1957 syn. nov. Syntype CAS. 9. Cephalic plate and tergite 1. 10. Head and forcipular segment.11. Tergites 20 and 21, dorsally. 12. Sternites of 20 and 21, ventrally.