Are Anatomical Measurements Useful for Interspecific and Sexual Differentiation of Temnomastax (Orthoptera: Eumastacidae) Species?

Olivier, Renan da Silva; Aranda, Rodrigo

doi:10.2108/zs170088

Cited by 3 publications

(2 citation statements)

References 37 publications

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“…In the last decades, different applications in biology have used geometric morphometrics (Adams et al, 2004). The studies quantify ontogeny (Carvalho et al, 2011, Komatsu et al, 2018, taxonomy, systematics or evolution of morphological characters (Cardini et al, 2007, Salas-Lopez et al, 2017, sexual dimorphism (Pretorius, 2005;Olivier & Aranda, 2018), ecomorphology, functional and biomechanical issues of biological forms (Jungers et al, 1995) and intraspecific geographic variation (Roggero & Passerin d'Entrèves, 2005;Cardini et al, 2007). Insect wings are very suitable structures for conducting morphometric studies, with many studies indicating geographic variation in wing structure (Hoffmann & Shirriffs, 2002;Hoffmann et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

Potential Niche Modeling Distribution and Wing Geometric Morphometrics of Apis mellifera In The Brazilian Pantanal

Peil

Aranda

2021

Sociobiology

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The ecological niche models can be important for biogeographic patterns and processes and geometric morphometrics involves identifying changes that have occurred and comparing them to other specimens from different places and/or environmental conditions, assessing whether the environment is influencing such change. The present work aimed to verify the potential model of distribution for Apis mellifera and analyze if there is variation in the geometric morphometrics in wing venation in the Pantanal. We followed the hypothesis that there is variation in the geometric morphometrics of wings and that the geographically closest groups are more similar. For niche modeling, 44 geographical points and 19 bioclimatic variables were used. For morphometrics, twenty-two anatomical landmarks were plotted at the intersection of the veins. The X and Y coordinates were standardized through Procrustes superimposition, and PCA and MANOVA tests were performed. The predictive model indicated that the center of the Pantanal plain shows the greater probability of occurrence for the species. The most important bioclimatic variables were: average temperature in the rainiest quarter (84%) and average annual temperature (72%). Morphometric analyzes indicate that there was variation between the most distant geographic points. The slight variation between some closely located points in the Pantanal can be related to individual reflections of colonies from other points, since the species has great dispersion capacity. Thus, the distribution of A. mellifera in the Pantanal is possibly related to temperature also accompanied by human occupation and the geometric morphometrics of its wings reflecting aspects of dispersion and population dynamics in the Brazilian Pantanal.

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Section: Introductionmentioning

confidence: 99%

Potential Niche Modeling Distribution and Wing Geometric Morphometrics of Apis mellifera In The Brazilian Pantanal

Peil

Aranda

2021

Sociobiology

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“…In the past few decades, mainly after the morphometric revolution, many geometric morphometric works have been published in different areas of biology. Such studies, that quantify organisms, may be related to ontogeny (Carvalho et al 2011, Komatsu et al 2018, intraspecific geographic variation (Roggero & Passerin d'Entrèves 2005, Cardini et al 2007), taxonomy, systematics or evolution of morphological characters (Cardini et al 2007, Salas-Lopez et al 2017, Katzke et al 2018, sexual dimorphism (Pretorius 2005, Olivier & Aranda 2018, ecomorphology or functional and biomechanical issues of biological forms (Jungers et al 1995). Several sets of acquisition, processing, and analyzing methods used to preserve geometric information from the original data are based on Cartesian coordinates of anatomical landmarks on the X,Y = 2D or X,Y,Z = 3D plane (Fornel & Cordeiro-Estrela 2012).…”

Section: Introductionmentioning

confidence: 99%

EFFECT OF THE PANTANAL’S FLOODING HISTORY IN MORPHOMETRIC ASPECTS OF THE SOLITARY PARASITOID Campsomeris dorsata (HYMENOPTERA: SCOLIIDAE)

Aranda

2019

Oecol. Aust.

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The shape of an organism and the variation between related groups lie at the core of understanding evolution and interactions between phenotypes, genotypes, and environmental spaces. Due to the relief conditions and hydrological profile of the region, the areas inside the Pantanal have different flood histories in respect to the flood duration and the amount of water retained in the plain. The objective of this work was to evaluate the effect of the environmental flooding gradient on the geometric morphometry variation of Campsomeris dorsata (Hymenoptera: Scoliidae) wings in Pantanal, to understand if the variations in spatial distribution related to the flooding history interferes in the morphology of the wings by identifying where, how, and to what magnitude such changes occur. The wings were mounted between blade and coverslip, labeled, and prepared for morphometric measurements. The points of intersection of wing veins (landmarks) were determined using a stereoscopic microscope coupled with a camera. The linear measurements of the landmarks were transformed using Procrustes to remove the size effect, leaving only the shape of the wings. The transformed data was evaluated using PCA and MANOVA to identify if there were differences in relation to the geographical location of occurrence. Thirty-three male C. dorsata wings were measured, and there was a clear separation between 3 distinct wing form groups along the Pantanal distribution. The variation in wing shape could be associated with selection from local environmental conditions in areas with distinct flooding histories, influencing migratory aspects among populations within the Brazilian Pantanal. The data for this small species, that has low dispersal capacity, is solitary, and presents an intimate relationship with soil characteristics, which directly reflects flooding aspects in the Pantanal, only reinforces the need to conserve more areas in the Brazilian Pantanal, since genetic diversity is an important factor for conservation.

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Sexual dimorphism in the badlands cricket (Orthoptera, Gryllinae, Gryllus personatus)

Madera,

Judge

2023

JOR

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Sexual dimorphism (SD) is a common phenomenon in sexual species and can manifest in a variety of ways. Sexual size dimorphism (SSD) is commonly investigated, but it can be confounded with sexual shape dimorphism (SShD) if multivariate measures of size are not used. Univariate studies may also overestimate the prevalence or direction of SSD when the sexes are strikingly different in shape, which may be an issue in taxa such as Orthoptera and other terrestrial arthropods where maximum body size is strongly constrained. Here we tested for the occurrence of both SSD and SShD in the badlands cricket Gryllus personatus (Orthoptera, Gryllinae). We measured four body size dimensions—maxillae span, head width, pronotum length, and mean hind femur length—and used multivariate methods to test whether male and female adult badlands crickets were sexually dimorphic in size and/or shape. All the univariate dimensions were sexually dimorphic, with males having wider heads and maxillae than females and females having longer pronota and hind femora than males, which indicates SShD. However, multivariate methods failed to detect SSD, instead confirming that the sexes primarily differ in body shape. We show how a simple ratio of head width to pronotum length captures SShD in badlands crickets and apply it to iNaturalist, a citizen science platform, to broaden our findings. We propose that orthopterists studying SD minimally measure head width, pronotum length, and hind femur length as a standard that will allow a more repeatable and generalizable assessment of the prevalence and direction of both SSD and SShD.

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Are Anatomical Measurements Useful for Interspecific and Sexual Differentiation of Temnomastax (Orthoptera: Eumastacidae) Species?

Cited by 3 publications

References 37 publications

Potential Niche Modeling Distribution and Wing Geometric Morphometrics of Apis mellifera In The Brazilian Pantanal

Potential Niche Modeling Distribution and Wing Geometric Morphometrics of Apis mellifera In The Brazilian Pantanal

EFFECT OF THE PANTANAL’S FLOODING HISTORY IN MORPHOMETRIC ASPECTS OF THE SOLITARY PARASITOID Campsomeris dorsata (HYMENOPTERA: SCOLIIDAE)

Sexual dimorphism in the badlands cricket (Orthoptera, Gryllinae, Gryllus personatus)

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