Convergent evolution: A new subfamily for bipaliin-like Chilean land planarians (platyhelminthes)

Autor(es)

Almeida, Ana Laura ^[1] ; Francoy, Tiago Mauricio ^[2] ; Alvarez-Presas, Marta ^[3] ; Carbayo, Fernando ^[4]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Museu Zool, Sao Paulo - Brazil

^[2] Univ Sao Paulo, Escola Artes Ciencias & Humanidades, Sao Paulo - Brazil

^[3] Univ Bristol, Sch Biol Sci, 24 Tyndall Ave, Bristol BS8 1TQ, Avon - England

^[4] Univ Sao Paulo, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ZOOLOGICA SCRIPTA; v. 50, n. 4, p. 500-508, JUL 2021.
• Citações Web of Science: 0

Resumo

The monotypic genus of land planarians Timyma (Rhynchodeminae, Geoplanidae) has been suggested to be a relict that could reflect a pre-Tertiary Antarctic connection between South America and Australia and New Zealand. Two species belonging to this genus, Timyma juliae E. M. Froehlich, 1978 and Timyma olmuensis Almeida \& Carbayo sp. n., are (re)described herein. Both species present ventral testes and a semilunate headplate, the same as the members of the Oriental subfamily Bipaliinae. Timyma olmuensis Almeida \& Carbayo sp. n. is studied by means of an integrative approach. Two nuclear gene fragments (28S, EF) and a mitochondrial gene fragment (COI) were sequenced. Phylogenetic analyses pointed out that Timyma is the sister-group of the Neotropical Geoplaninae and is phylogenetically distant from Bipaliinae, contradicting the hypothesis of Timyma as a South American relict of a Gondwanan taxon. These results indicate that the headplate evolved independently in Timyma and Bipaliinae. Morphological data reinforce this view. Accordingly, Timyminae subfam. n. is proposed for Timyma and a new diagnosis for the genus is proposed. (AU)

• Processo FAPESP: 19/12357-7 - Estudos taxonômicos integrados de planárias terrestres (Platyhelminthes, Tricladida) neotropicais, com ênfase na diversidade brasileira e chilena, e suas áreas de endemismos na Mata Atlântica
• Beneficiário: Fernando Jesús Carbayo Baz
• Modalidade de apoio: Auxílio à Pesquisa - Regular