Tschaidicancha Roewer, 1957

Benedetti, Alipio Rezende & Pinto-da-Rocha, Ricardo, 2022, Systematic revision and total evidence phylogenetic analysis of the Andean family Metasarcidae Kury, 1994 (Opiliones: Laniatores), with description of two new genera and twenty new species, Arthropod Systematics & amp; Phylogeny 80, pp. 309-388 : 309

publication ID	https://dx.doi.org/10.3897/asp.80.e73829
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scientific name	Tschaidicancha Roewer, 1957
status

Treatment

3.49. Tschaidicancha Roewer, 1957 View in CoL

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

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 View Figure 6 ) or gamma-P-type DSS ( T. joseochoai sp. nov.; Fig. 6D View Figure 6 ). Ocularium low, medially depressed. Ocularium with two high spines. Areas of DS small to moderately tuberculate (Fig. 6C-F View Figure 6 ). Area I undivided ( T. chaplini sp. nov., T. joseochoai sp. nov., T. weyrauchi ; Fig. 6C, D, F View Figure 6 ) or divided in two halves ( T. scorsesei sp. nov.; Fig. 6E View Figure 6 ). Area III armed with two high spines. Posterior margin unarmed. Coxa IV reaching area IV or posterior margin. Coxa IV unarmed (Fig. 6C-F View Figure 6 ). Femur IV much longer than DS length (Figs 11G-N View Figure 11 , 27 View Figure 27 ). Penis VP subrectangular, with distal-lateral projections (except T. scorsesei sp. nov.) thin thickness (Figs 14I-L View Figure 14 , 21 View Figure 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 View Figure 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.