AMAZON DEEP SOUTH: SCHUBARTHELPHUSA, A NEW GENUS TO ACCOMMODATE TWO FRESHWATER CRAB SPECIES FROM THE STATE OF RONDÔNIA, BRAZIL (BRACHYURA, PSEUDOTHELPHUSIDAE)

Author(s)

Magalhaes, Celio ; Pinheiro, Allysson P. ; Mantelatto, Fernando L.

• Document type: Journal article
• Source: CRUSTACEANA; v. 97, n. 5-9, p. 9-pg., 2024-08-01.

Abstract

A new genus of pseudothelphusid crab is proposed to accommodate two species from the state of Rond & ocirc;nia in the southern Amazon region of Brazil. The new taxon was retrieved as a separate lineage from the genus Fredius Pretzmann, 1967, based on an integrative approach using molecular phylogenetic analysis and morphological characters of the male first gonopod, as well as taking into account its geographic distribution. In terms of gonopod morphology, the new genus resembles Fredius but it is characterized by an enlarged and distinctly inflated proximal portion of the cephalic lobe, a well-developed patch of strong, corneous spines along the mesial and abdominal surfaces of the cephalic lobe, and a mesial lobe that is extremely developed on a long, narrow, sinuous or convoluted projection. The new genus has the southernmost distribution of the Pseudothelphusidae within the Amazon Basin. (AU)

• FAPESP's process: 09/54931-0 - Improvement and management of biological specimen collections at the Departamento de Biologia, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo
• Grantee: Carlos Alberto Garofalo
• Support Opportunities: Research Infrastructure Program - Biological specimen collections
• FAPESP's process: 10/50188-8 - Decapod crustaceans: multi-disciplinary characterization of the sea biodiversity of the State of São Paulo (taxonomy, spermiotaxonomy, molecular biology and population dynamics)
• Grantee: Fernando Luis Medina Mantelatto
• Support Opportunities: BIOTA-FAPESP Program - Thematic Grants
• FAPESP's process: 18/13685-5 - Integrative analysis of the Brazilian fauna of decapod crustaceans: taxonomy, phylogenetic systematics, spermiotaxonomy, morphology of post-embryonic development, ecology and conservation
• Grantee: Fernando Luis Medina Mantelatto
• Support Opportunities: BIOTA-FAPESP Program - Thematic Grants