Monthly Archives: January 2017

New record for Mirinaba

A new locality has been recorded for the species Mirinaba jaussaudi (Morretes, 1937) from Paraná state in Brazil.

schermafbeelding-2017-01-23-om-07-41-15

This species is now known from different ecoregions.

Reference:
Birckolz, C.J. & Gernet, M.V., 2016. New record of Mirinaba jaussaudi (Gastropoda, Strophocheilidae) in Paraná state, southern Brazil, and rectification of a known locality. – Strombus 23(1-2): 1-5.

Photo of the day (169): Rhodea

Eduardo Calderón sent me two photographs for identification. Although the shell height was not mentioned in any way, the figures combined with the locality where the specimen was found (Colombia, near Cali, in a cloud forest at El Faro, ca. 1800 m) makes me think this is likely Rhodea gigantea Mousson, 1873. See also Grego et al. (2007).

unnamed-2 unnamed

Reference:
Grego, J., Steffek, J. & Infante, A.P., 2007. Review of the genus Rhodea (Gastropoda, Pulmonata, Subulinidae), with description of two new species from Colombia. – Basteria, 71: 13-28.

Subterranean hotspots

Cave systems are always an interesting place for biologists to see what animals live there and might have adapted themselves to a subterranean life. According to Silva & Ferreira (2016) “[t]he term hotspots of subterranean biodiversity has been used to define subterranean habitats with an arbitrary cutof of twenty or more obligate stygobitic and troglobitic species. Until present, no hotspots of subterranean biodiversity had been identified in South America. Thus, the objective of this work is to present the first two hotspots of subterranean biodiversity in that continent. The two hotspots of subterranean biodiversity are the Toca do Gonçalo cave (22 spp.) and Areias cave systems (28 spp.). The cave species, some of them considered relict species, belong to the Platyhelminthes (1 sp.), Nemertea (1 sp.), Gastropoda (2 spp.), Amphipoda (2) Isopoda (7), Decapoda (1), Collembola (5), Coleoptera (5), Ensifera (1), Sternorrhyncha (1), Zygentoma (1), Diplopoda (6) Chilopoda (5) Araneae (2), Opiliones (1) Palpi- gradi (2), Pseudoscorpiones (4), and Osteicthyes (2). Although both caves, together, have 50 troglobitic species, only 38% of these species are formally described. Both caves have perennial water bodies, but terrestrial obligate cave invertebrates are dominant in number of species in both systems (around 77%). While the Areias system is partially contained in a conservation unit, Toca do Gonçalo cave is currently unprotected, although it certainly deserves protection”.

schermafbeelding-2017-01-05-om-13-37-26

One terrestrial species was found, Rotadiscus sp. Other recent reports on snails from caves may be found here and here.

Reference:
Silva, M.S. & Ferreira, R.L., 2016. The first two hotspots of subterranean biodiversity in South America. – Subterranean Biology, 19:1-21.