Sex Ratio, Sexual Dimorphism, and Wing Geometric Morphometrics in Species of Trypoxylon Latreille, 1796 (Hymenoptera: Crabronidae)

Autor(es)

Santoni, Mariana Marchi ; Magri, Lucas Araujo ; Silva, Vinicius de Oliveira ; da Silva, Bruno Hofstatter ; Del Lama, Marco Antonio

• Tipo de documento: Artigo Científico
• Fonte: Neotropical Entomology; v. N/A, p. 13-pg., 2023-09-28.

Resumo

Studying the nesting biology of wasp and bee species provides valuable insights into the ecology and evolution of these insects, shedding light on their ecological significance and aiding in their conservation efforts. Trypoxylon Latreille, 1796 is a genus of spider-hunting wasps that provisions their brood with paralyzed preys. This study focuses on aspects of nesting biology of Trypoxylon (Trypargilum) species such as sex ratio, sexual dimorphism, and morphometric variation at both inter- and intraspecific levels. The secondary sex ratio (SR) exhibited variation among species and populations. Males predominantly emerged from the first brood cells and from trap nests with smaller diameters. In comparison, females showed significantly larger body mass and linear wing measurements than males. Procrustes ANOVA values for centroid size (CS) and wing shape (SH) indicated significant differences in both wing size and shape among the five analyzed Trypoxylon species. Sexual dimorphism indices (SDI) derived from centroid size were found to be similar to those obtained from linear measurements, while SDI values based on body mass were significantly higher. Nests containing a greater number of cells tended to produce a larger number of higher-quality males and females. This observation, along with the lower coefficient of variation for female body size and high heritability, suggests that this trait may be subject to natural selection. Further studies that estimate the size of parents and their respective offspring are necessary to confirm the fitness advantage associated with larger female sizes in Trypoxylon species. (AU)

• Processo FAPESP: 05/58923-0 - Aspectos da biologia de nidificacao e estrutura sociogenetica intranidal em especies de trypoxylon (hymenoptera: sphecidae).
• Beneficiário: Mariana Marchi Santoni
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 04/02389-3 - Biologia, estrutura sociogenetica intranidal e estrutura genetica populacional de trypoxylon (trypargilum) aurifrons shuckard, 1837 (hymenoptera sphecidae).
• Beneficiário: Mariana Marchi Santoni
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 19/14363-4 - A morfometria geométrica sustenta a distinção entre os dois grupos de populações caracterizados em Partamona rustica (Hymenoptera: Apidae: Meliponini)?
• Beneficiário: Vinícius de Oliveira Silva
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 20/14187-9 - As similaridades de forma da asa entre espécies de Partamona (Hymenoptera: Apidae: Meliponini) são concordantes com as relações propostas por Camargo & Pedro (2003)?
• Beneficiário: Lucas Araújo Magri
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica