INVESTIGADORES
CORRONCA Jose Antonio
congresos y reuniones científicas
Título:
New records and species of Theridiosomatidae spiders (Araneae) from the Northwest of Argentina. 17Th
Autor/es:
CORRONCA, J. A.; GONZALO DANIEL, RUBIO; ARGAÑARÁS, M. F.
Lugar:
Sao Pedro
Reunión:
Congreso; 17Th International Arachnological Congress, Sao Pa; 2007
Institución organizadora:
international Arachnological Society
Resumen:
Theridiosomatidae is represented by very small spiders, living almost exclusively in wet or humid, shaded forest
habitats. It is chiefly cosmotropical family and consists of 12 genera, and the only record of this family from Argentina
was published in 2005 by Rubio and colleagues. This family is characterized by the presence of pits on the prolateral
margins of the sternum in both sexes, the conformation of the bulb and the route of the reservoir of the male palp the
connate spermathecae and the 4th tibial dorsal trichobothria usually 2 to 4 times longer than the tibial diameter. This
aim of this work is to give new records of this spider family to Tucuman and Salta provinces, Argentine and to
describe a new species of the Epilineutes genus. The material was collected in the last 5 years in different sites
corresponding to agricultural crops plots and Yungas rain forest of the North-West of Argentina using a G-Vac method
to collect spider over the vegetation. A total of 125 theridiosomatids spiders were collected corresponding to the
following genera: Chthonos sp. from soybean crop plot in Burruyacu, Tucum·n province; Ogulnius sp. from strawberry
crop plot in Vaqueros, and in Yungas pedemountain of Salta province; and Epilineutes sp. nov., represented by 56
specimens collected in the Yungas mountain forest from El Carmen and San Lorenzo of Salta province. Here, this new
species is described and illustrated. Other three immature specimens of a Theridiosomatinae subfamily, maybe another
Epilineutes species, were collected in El Carmen, too. All of these records are showing that more Theridiosomatidae
genera and species are distributed in Argentina and we need to do systematic collections. A complete taxonomical
revision of this family is a need to know the real diversity of them in Argentina