A further new species for the genus Ananteris Thorell, 1891 (Scorpiones: Ananteridae) from a poorly prospected region of Brazilian Amazonia

  A further new species for the genus Ananteris Thorell, 1891 (Scorpiones: Ananteridae) from a poorly prospected region of Brazilian Amazonia Abstract  A new species of the genus Ananteris Thorell, 1891 is described from the region which today defines the ‘Reserva Biológica do Río Trombetas’ in the state of Pará, Brazil. The collection of the unique specimen, presently study, took place previously to the definition of this reserve, in a joint field trip with a team of the Instituto Brasileiro de Desenvolvimento Florestal (IBDF). Ananteris antoni sp. n. is described based on one female specimen collected in a zone of dense humid forest, under death log. With this new description, the number of Ananteris species known for the scorpion fauna of Brazil is now raised to 33. Lourenço W. R., 2026. – A further new species for the genus Ananteris Thorell, 1891 (Scorpiones: Ananteridae) from a poorly prospected region of Brazilian Amazonia. Faunitaxys, 14(63): 1 – 5.  https://doi.o...

SPATIOTEMPORAL SEGREGATION OF THE SYMPATRIC SPECIES CUPIENNIUS GETAZI AND C. COCCINEUS (ARANEAE: TRECHALEIDAE) IN PACUARE NATURE RESERVE, COSTA RICA

 


SPATIOTEMPORAL SEGREGATION OF THE SYMPATRIC SPECIES CUPIENNIUS GETAZI AND C. COCCINEUS (ARANEAE:  TRECHALEIDAE) IN PACUARE NATURE RESERVE, COSTA RICA

ABSTRACT

The coexistence of species with similar ecological requirements is explained by resource partitioning. Spiders are a good model to test hypotheses about niche segregation between co-occurring species. Here, we analysed the spatiotemporal segregation of the sympatric species Cupiennius getazi and C. coccineus in a tropical forest of Costa Rica. Significant differences were found in the habitat of each species, with C. getazi mainly appearing in the reserve track and C. coccineus in the swamp zones. No differences between species were found in the daily activity patterns. Juveniles appeared at lower height in the vegetation than adults/subadults, but no differences between species were found in the height at which they appeared in the vegetation. The orange morphotype of C. getazi was more frequent than the grey morphotype. Cannibalism is reported in C. coccineus. Differential habitat use indicates a spatial segregation between these species. The intraspecific differences regarding the vertical distribution could contribute to reducing cannibalism in these spiders. Segregación espaciotemporal de las especies simpátricas Cupiennius getazi y C. coccineus (Araneae: Trechaleidae) en la Reserva Natural de Pacuare, Costa Rica Resumen: La coexistencia de especies con necesidades ecológicas similares se explica por reparto de recursos. Las arañas son un buen modelo para contrastar hipótesis sobre segregación de nichos entre especies coocurrentes. Aquí analizamos la segrega-ción espaciotemporal de las especies simpátricas Cupiennius getazi y C. coccineus en un bosque tropical de Costa Rica. Se en-contraron diferencias significativas en el hábitat de cada especie, apareciendo C. getazi principalmente en el sendero de la reserva y C. coccineus en las zonas pantanosas. No se encontraron diferencias entre especies respecto a los patrones de actividad diari-os. Los juveniles aparecieron a alturas más bajas de vegetacion que los adultos/subadultos, pero no se encontraron diferencias entre especies respecto a la altura a la que aparecían en la vegetación. El morfotipo naranja de C. getazi fue mas frecuente que el morfotipo gris. Se reporta canibalismo en C. coccineus. Las diferencias en el uso del hábitat indican segregación espacial entre estas especies. Las diferencias intraespecíficas obtenidas respecto a la distribución vertical podrían contribuir a reducir el canibal-ismo en estas arañas. Palabras clave: Araneae, Trechaleidae, arañas errantes, canibalismo, patrones de actividad, uso de hábitat, Costa Rica.