Morphological changes during ontogeny of the male first and second gonopods of Mithraculus forceps A. Milne-Edwards, 1875 (Brachyura: Majoidea: Mithracidae)
| Autor: | William Santana, Fernando José Zara, Laira Lianos, Rafael Swenson, Michelle Mollemberg, Valter José Cobo |
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| Přispěvatelé: | Universidade Estadual Paulista (UNESP), Unisagrado, Instituto Básico de Biociências de Taubaté UNITAU, Universidade Regional do Cariri (URCA) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Systematics animal structures biology Ontogeny Mithracidae 010607 zoology morphological maturity food and beverages Anatomy Biodiversity Development biology.organism_classification 010603 evolutionary biology 01 natural sciences body regions reproduction Mithraculus forceps Majoidea Microscopy Gonopod Ecology Evolution Behavior and Systematics scanning electron microscopy Taxonomy |
| Zdroj: | Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| Popis: | Made available in DSpace on 2022-05-01T05:29:26Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-01-01 In brachyuran crabs, the complexity of the copulatory system provides important information about the systematics of the group. Here we used scanning electron microscopy and light microscopy to provide information about the morphological changes during the gonopods ontogeny in the spider crab Mithraculus forceps. For this, a series of specimens were analysed and grouped in size classes of cephalothorax width (CW). The smaller males (first and second size classes) presented the first gonopod without a formed ejaculatory aperture and with an indistinct apical plate. The ejaculatory canal aperture is fully formed in size class 5 with 8.8 to 9.9 mm (CW). In adult males, the apical plate is divided in two lobes: a rounded mesial lobe and a distinct tapering lateral lobe with a large ejaculatory canal aperture. Throughout growth, there was an increment in number and/or size of the secondary cuticle structures, such as setae, spines, and sensilla. Morphological changes in the second gonopod are not abrupt during the ontogenetic development, with the girdle in the apical region and the median process becoming more prominent and tapered. Although to clearly determine the sexual maturity, information on the gonadal development (physiological sexual maturation) is needed, we observed that the gonopods morphology could provide important information to determine the sexual maturation. In our analyses, the morphological maturity occurred in line with the physiological maturity, both diagnosed in the size class 5. Laboratório de Sistemática Zoológica Universidade Estadual Paulista “Júlio de Mesquita Filho” Invertebrate Morphology Laboratory (IML) Department of Applied Biology School of Agricultural and Veterinary Sciences São Paulo State University (UNESP) Centro de Ciências da Saúde Unisagrado Laboratório de Biologia Marinha LabBMar Instituto Básico de Biociências de Taubaté UNITAU Department of Biological Sciences Universidade Regional do Cariri (URCA) Laboratório de Sistemática Zoológica Universidade Estadual Paulista “Júlio de Mesquita Filho” Invertebrate Morphology Laboratory (IML) Department of Applied Biology School of Agricultural and Veterinary Sciences São Paulo State University (UNESP) |
| Databáze: | OpenAIRE |
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