New insights into maternal care and juvenile dispersal in Pterinopelma roseum (Araneae: Theraphosidae)

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  New insights into maternal care and juvenile dispersal in Pterinopelma roseum (Araneae: Theraphosidae) Abstract Tarantulas (Theraphosidae) exhibit a wide diversity of reproductive behaviors, yet many aspects of their natural history, particularly those related to maternal care and juvenile dispersal, remain poorly known. Pterinopelma roseum is a species distributed in southern Brazil and northeastern Argentina for which information on reproductive biology is limited. The aim of this study was to document maternal care, egg sac composition, and juvenile dispersal through the monitoring of a female collected together with its egg sac in Misiones Province, Argentina. The female was maintained under controlled laboratory conditions and observed daily until juvenile dispersal. During the incubation period, the female actively protected the egg sac, remaining in contact with it most of the time and displaying defensive behaviors when disturbed, while continuing to feed regularly. The e...

Taxonomic redescription of Tityus (Tityus) proseni Abalos 1954 (Scorpiones: Buthidae) and first record for the departments of Beni and Santa Cruz - Bolivia

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Taxonomic redescription of Tityus (Tityus) proseni Abalos 1954 (Scorpiones: Buthidae) and first record for the departments of Beni and Santa Cruz - Bolivia

Abstract

In 1954 Abalos described the species Tityus proseni with specimens found in Cochabamba-Bolivia, however, since then the data of the species have not been updated. New specimens were recently captured from the departments of Beni and Santa Cruz - Bolivia. In order to carry out a detailed redescription and expansion of the distribution data of the species in Bolivia, these were reviewed according to: its external morphology, pigmentation patterns and morphometric data. The data resulting from the analysis provide new characters for the species, not contemplated in the original description, new ranges in morphometric variables previously analyzed, new data on pigmentation patterns. On the other hand, the differential morphological and morphometric data of T. proseni with those of T. argentinus and T. sorataensis are presented, since they are apparently similar species within the country.

Humboldt-Paputsachis, Ciro, Villarreal-Carvajal, Jeysa Camila, & Fortún Fernández, Evelin Esther. (2025). Taxonomic redescription of Tityus (Tityus) proseni Abalos 1954 (Scorpiones: Buthidae) and first record for the departments of Beni and Santa Cruz - Bolivia. Journal of the Selva Andina Research Society , 16 (2), 81-91. Epub 2025 Aug 31. https://doi.org/10.36610/j.jsars.20252326