Comparative spermatozoal ultrastructure and molecular analysis in dromiid crabs and their phylogenetic implications for Dromiidae and Podotremata (Decapoda: Brachyura)

Author(s)

Garcia Bento, Maria Alice ^{[1, 2]} ; Miranda, Ivana ^{[1, 2]} ; Mantelatto, Fernando Luis ^[3] ; Zara, Fernando Jose ^{[1, 2, 4]}

Affiliation

^[1] Univ Estadual Paulista, Dept Biol Aplicada Agr, Lab Morfol Invertebrados IML, UNESP, FCAV, Via Acesso Prof Paulo Donato Castellane S-N, BR-14884900 Jaboticabal, SP - Brazil

^[2] Ctr Aquicultura Unesp CAUNESP, Via Acesso Prof Paulo Donato Castellane S-N, BR-14884900 Jaboticabal, SP - Brazil

^[3] Univ Sao Paulo, FFCLRP, Dept Biol, LBSC, Av Bandeirantes 3900, BR-14040901 Ribeirao Preto, SP - Brazil

^[4] Univ Estadual Paulista, UNESP, 1B, Ave 24 A, 1515, BR-13506900 Rio Claro, SP - Brazil

• Document type: Journal article
• Source: ARTHROPOD STRUCTURE & DEVELOPMENT; v. 47, n. 6, p. 627-642, NOV 2018.
• Web of Science Citations: 0

Abstract

We described the spermatozoal ultrastructure and conducted a molecular analysis of Dromiidae Hypoconcha parasitica, Hypoconcha arcuata, Moreiradromia antillensis and Dromia erythropus. To elucidate the relationship between the different species of this brachyuran group, we also compared the spermatozoal morphologies and phylogenetic positioning among species of Dromiidae, Dromioidea and Podotremata. Specimens were collected from the northern coast of Sao Paulo, Brazil and were fixed and processed followed by transmission electron microscopy and molecular analysis routines. The Dromiidae spermatozoa studied are characterized by a discoidal acrosome, with three or four concentric zones, which are centrally separated by a bilaterally capitate perforatorial chamber, with a ``mushroom{''}-shaped apex in the Hypoconchinae and a ``T-shape{''} in Dromiinae. Above the perforatorial chamber, there is an apical protuberance, continuous with the subopercular region and the operculum, which forms a low, centrally perforated dome. Under differential interference contrast microscopy, the spermatozoa show 3 to 4 radial arms. The spermatozoal characters in Hypoconchinae and Dromiinae do not separate these subfamilies from the Dromiidae and Dromioidea. Ultrastructural differentiation was only found between representative Dromioidea and other Podotremata. Thus, the spermiotaxonomy of these Hypoconcha, Moreiradromia and Dromia species corroborated previous morphological and molecular studies, supporting the monophyly of Dromiidae and Dynomenidae in relation to Homolidae and Latreilliidae. (C) 2018 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 14/21294-5 - Reproductive system in Dromiidae: histochemical and ultrastructural characterization of spermatozoa and seminal fluid in Hypoconcha parasitica (Linnaeus, 1763)
• Grantee: Maria Alice Garcia Bento
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• 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