3.49. Tschaidicancha Roewer, 1957

Figs 6C-F, 11G-N, 14I-L, 21, 27, 29A, B

Tschaidicancha Roewer, 1957: 80 (desc); Soares, Soares and Jim 1992: p.12 (rdesc); Kury and Maury 1998: p.145 (syst); Kury 2003: p.145 (cat); Mendes 2011: 441, 446 and 483 (syst). Type-species: Tschaidicancha weyrauchi Roewer, 1957 (by original designation).

Diagnosis.

Tschaidicancha can be distinguished from all other Metasarcidae genera by the combination of following: Kappa-type or gamma-P-type DSS; ocularium low, with two pairs of high spines; area III with two pairs of high spines; long leg IV (femur IV length/DS length> 1.6); male coxa IV apex reaching posterior margin; penis VP subrectangular, with distal-lateral projections (in most species), thin thickness; with less than five MS C; stylus laterally flattened, with apex inflated; dorsal process present.

Redescription.

Kappa-type, with straight posterior margin of DS; carapace long and wide; constriction I well marked, constriction II absent, mid-bulge slightly larger than carapace and coda undefined, coalescing with mid-bulge ( T. chaplini sp. nov., T. scorsesei sp. nov. and T. weyrauchi; Fig. 6C, E, F) or gamma-P-type DSS ( T. joseochoai sp. nov.; Fig. 6D). Ocularium low, medially depressed. Ocularium with two high spines. Areas of DS small to moderately tuberculate (Fig. 6C-F). Area I undivided ( T. chaplini sp. nov., T. joseochoai sp. nov., T. weyrauchi; Fig. 6C, D, F) or divided in two halves ( T. scorsesei sp. nov.; Fig. 6E). Area III armed with two high spines. Posterior margin unarmed. Coxa IV reaching area IV or posterior margin. Coxa IV unarmed (Fig. 6C-F). Femur IV much longer than DS length (Figs 11G-N, 27). Penis VP subrectangular, with distal-lateral projections (except T. scorsesei sp. nov.) thin thickness (Figs 14I-L, 21); with less than five MS C; MS B1 sub basal long and straight; lateral sacs long and apically blunt (shorter in T. weyrauchi); stylus laterally flattened, with apex inflated; dorsal process present.

Distribution.

(Fig. 29) PERU. Huánuco and Pasco.

Species composition.

Tschaidicancha chaplini sp. nov.; Tschaidicancha joseochoai sp. nov.; Tschaidicancha scorsesei sp. nov.; Tschaidicancha weyrauchi Roewer, 1957.

Remarks.

Mendes (2011) in her phylogeny and taxonomic revision of Heteropachylinae cited Tschaidicancha acanthoma as an outgroup (cf. Mendes’ fig. 1-2 and data matrix; although she cited T. weyrauchi in table 1 [p.439]). However, this species has never been properly described, which consequently results in a nomen nudum.