The genus Antholoba Hertwig, 1882 (Actiniaria, Enthemonae) is characterized by the presence of short and numerous tentacles, a folded oral disc in lobes or cup-shaped with an expanded distal part, a smooth or reticulated column wall on its surface, a very long mesogloeal sphincter, and the absence of acontia. At the present, the genus belongs to the family Actinostolidae (superfamily Actinostoloidea) and has two valid species recorded in Antarctica, the northeast and southeast Atlantic, and the southeast-western Pacific: A. achates (Drayton in Dana, 1846) e A. perdix (Verrill, 1882). In this study we describe a new species of the genus Antholoba, based on specimens collected in a locality of the southwestern of Brazil. All specimens were described based on their external morphological characteristics and cnidom, one specimen was examined internally, and one specimen sequenced using three mitochondrial (12S rDNA, 16S rDNA, and COIII) and two nuclear (18S rDNA and 28S rDNA) genetic markers, and comparison with two sequences of its congener from South America, A. achates (Argentina and Chile). The new species of sea anemone, Antholoba fabiani sp. nov. is characterized from its congeners by the presence of >750 short tentacles (eight cycles), >192 pairs of mesenteries (seven cycles), gametogenic tissue in the 4th and 6th pair of mesenteries, and the presence of b-mastigophores in the mesenteric filaments. Our phylogenetic analyses support the distinction between the two species. Furthermore, the resulting phylogenetic trees recover the species of the genus Antholoba as a sister group of the family Aliciidae, within the superfamily Metridioidea, rather than Actinostoloidea, establishing the new family Antholobidae fam. nov.
Sistemática e Evolução - Pôsteres - 29/11/2023 - 15:30 h às 16:30 h
Description of a new species and family of the genus Antholoba Hertwig, 1882 (Actiniaria: Metridioidea) of the southwestern Atlantic, Brazil
Forma de apresentação: Pôster
Durán-Fuentes, Jeferson A (1); González-Muñoz, Ricardo (2); Daly, Marymegan (3); Stampar, Sérgio N (4) ; Biffi, Ayla (5)
(1,4,5) Laboratório de evolução e diversidade aquática (LEDALab), Faculdade de Ciências, Departamento de Ciências Biológicas, Universidade Estadual Paulista (UNESP), Bauru, estado de São Paulo, Brasil; (2) Instituto de Investigaciones Marinas y Costeras (IIMyC), Facultad de Ciencias Exactas y Naturales, Universidad Nacional de Mar del Plata, Mar de Plata, Argentina; (3) Department of Evolution, Ecology, and Organismal Biology, The Ohio State University, Columbus, OH, 43212, USA.
Autor que fará a apresentação: Durán-Fuentes, Jeferson
Email do autor que fará a apresentação: jeferson.duran-fuentes@unesp.br
Financiamento: Fundação de Amparo à pesquisa do Estado de São Paulo (FAPESP)
O trabalho foi desenvolvido com o uso da infraestrutura do CEBIMar? Não