Parastacus fluviatilis Ribeiro & Buckup

Ribeiro, Felipe Bezerra & Araujo, Paula Beatriz, 2024, Taxonomic review of the genus Parastacus Huxley, 1879 (Decapoda: Astacidea: Parastacidae) with description of five new species, Zootaxa 5455 (1), pp. 1-84 : 44

Parastacus fluviatilis Ribeiro & Buckup in Ribeiro et al., 2016

( Fig. 25 )

Parastacus fluviatilis Ribeiro & Buckup in Ribeiro et al., 2016: 305 , figs. 2–5.—­ Crandall & De Grave 2017: 641.—­ Rogers et al. 2020: 879 (key), fig. 23.69B.—­ Huber et al. 2022: 276 (key)..—­ De los Ríos-Escalante et al. 2022: 1129 (appendix), fig. 1f. —­ De los Ríos-Escalante et al. 2022: 1129 (appendix), fig. 1i.—­ Huber et al. 2024: 14 (key).

Type locality. São José dos Ausentes, state of Rio Grande do Sul, Brazil ( Ribeiro et al. 2016) .

Additional material examined. Brazil, Rio Grande do Sul: one female, São José dos Ausentes, Divisa river , 3/ X/2002, coll. G. Bond-Buckup ( UFRGS 2059 ) ; one male, São José dos Ausentes, Morro Monte Negro , 03/X/2002, coll. G. Bond-Buckup ( UFRGS 2293 ) ; one juvenile, São José dos Ausentes, Pico Monte Negro (28°36'59.81"S; 49°47'48.48"W), 14/V/2013, coll. F.B. Ribeiro, K.M. Gomes & D.C. Kenne ( UFRGS 6435 ) ; one male, Silveira / São José dos Ausentes, Divisa river (28°38'43.91"S; 49°56'27.67"W), 15/V/2013, coll. F.B. Ribeiro & K.M. Gomes ( UFRGS 6436 ) .

Diagnosis and Description. Ribeiro et al. (2016).

Remarks. The record of this species at about 1400 m of altitude in Pico Monte Negro, São José dos Ausentes (RS) constitutes the higher record of freshwater crayfish in South America.

Distribution. Brazil: state of Rio Grande do Sul ( Ribeiro et al. 2016).

Color of live specimens. Ribeiro et al. (2016) ( Fig. 25A ).

Habitat and Ecology. Streams at high altitudes (~ 1,400m) ( Ribeiro et al. 2016) ( Fig. 25C ). This species builds shallow burrows with small chimneys in the river margins ( Fig. 25B ) ( Ribeiro et al. 2016). Burrows of P. fluviatilis can be identified as type 1a,b according to Horwitz and Richardson’s (1986) classification and the species can be considered a tertiary burrower based on Hobbs’ (1942) classification ( Ribeiro et al. 2020).

Figures

FIGURE 25. Parastacus fluviatilis Ribeiro & Buckup in Ribeiro et al., 2016.A—­ Living specimen; B—­ Burrow opening (White arrow); C—­ Habitat, a creek in São José dos Ausentes municipality, state of Rio Grande do Sul, Brazil.