Thalkethops Crabill, 1960

Schileyko, Arkady A., Vahtera, Varpu & Edgecombe, Gregory D., 2020, An overview of the extant genera and subgenera of the order Scolopendromorpha (Chilopoda): a new identification key and updated diagnoses, Zootaxa 4825 (1), pp. 1-64 : 11

Thalkethops Crabill, 1960

Fig. 12

Type species. Thalkethops grallatrix Crabill, 1960 (by monotypy).

Diagnosis. Sternites without lateral margination as well as both median and transverse sutures but with “a shallow midlongitudinal and rather broad sulcus” according to the original description.

Number of species. 1.

Remarks. Treated as a genus in Edgecombe & Bonato (2011: 405), Bonato et al. (2016), Lewis (2016b: 26). In his short and undetailed account on Kethopinae, Shelley (2002: 78) reasonably mentioned that “There is very little difference between Thalkethops and Kethops , and they may have to merged when more material of both is available”, noting (p. 79) 6 other (in addition to the holotype) available specimens from six “new localities” (all in New Mexico) and mentioning that “No observable variation is evident”.

Figures

FIGURES 7–13. Scolopocryptops melanostoma Newport, 1845; Ad. Rc 7172 7 LBS 23 and ultimate legs, laterally; Ad. Rc 7503 8 anterior margin of forcipular coxosternite + maxillae 2, ventrally; Scolopocryptops ferrugineus (L., 1767); Peru specimen from Markus Koch collection 9 forcipular segment ventrally; Scolopocryptops miersii Newport, 1845; BMNH, BM 1889.4.13.3–5 10 apical part of maxilla 2 laterally; Kethops utahensis (Chamberlin, 1909) 11 figures 4–6 of Chamberlin (1912); Thalkethops grallatrix Crabill, 1960 12 figure 15 of Crabill (1960); Kethops utahensis (Chamberlin, 1909); USNM Mill Creek (Utah) specimen 13 apical part of maxilla 2 ventro-laterally; (20)—leg 20, (am)—anterior margin of forcipular coxosternite, (cp)—coxopleural process, (cst)—forcipular coxosternite, (dms)—dorso-medial spinous process of ultimate prefemur, (p2)— pretarsus of maxilla 2, (pa)—short projection of anterior margin of forcipular coxosternite, (pf)—prefemur, (pla)—pretarsal lamellae, (pt)—process of forcipular trochantero-prefemur, (rl)—right[?] ultimate leg, (S)—? sternite, (st)—saw teeth-like small spinous processes, (t1)—ultimate tarsus 1, (t2)—ultimate tarsus 2, (ti)— ultimate tibia, (us)—ultimate LBS, (ust)—ultimate sternite, (vsp)—ventral spinous process of ultimate prefemur.