136 Works

CT and 3D Data from: A large Middle Devonian eubrachythoracid ‘placoderm’ (Arthrodira) jaw from northern Gondwana

Melina Jobbins, Martin Rücklin, Thodoris Argyriou & Christian Klug
Leptodontichthys ziregensis is a newly described eubrachythoracid arthrodire from the Middle Devonian of Morocco. Only the posterior superognathal is preserved, it possesses features which were, so far, seen in Late Devonian forms. The jaw bone presents two sets of teeth, one lateral and one posterior, with dentinous tissue, pulp cavities and vascular canals preserved. The CT scans provided here are the ones used for the study. The complete jaw data was used for the overall...

Data from: Reinvestigation of the type specimen of Ginkgophyllum grasseti Saporta 1875 using Reflectance Transforming Imaging

Anne-Laure Decombeix, Ignacio H. Escapa, Dario De Franceschi & Olivier Béthoux
Reflectance Transforming Imaging (RTI) produces photographs in which the angle of the light can be changed at will, allowing to investigate remotely minute details of the 3D structure of sub-planar objects. Here we apply this technique to the type specimen of Gingkophyllum grasseti, a vegetative shoot with putative ginkgophyte affinities from the early Permian of Lodève (France). Gingkophyllum grasseti, the type species of the corresponding genus, was originally described by Saporta in 1875 and has...

Data for Concordance-based approaches in phylogenomics

Joseph Walker, Stephen Smith, Edwige Moyroud & Richard Hodel
Gene tree conflict is common and finding methods to analyze and alleviate the negative effects that conflict has on species tree analysis is a crucial part of phylogenomics. This study aims to expand the discussion of inferring species trees and molecular branch lengths when conflict is present. Conflict is typically examined in two ways: inferring its prevalence, and inferring the influence of the individual genes (how strongly one gene supports any given topology compared to...

Evolutionary drivers of sexual signal variation in Amazon slender anoles

Ivan Prates, Annelise D'Angiolella, Miguel Rodrigues, Paulo Melo-Sampaio, Kevin De Queiroz & Rayna Bell
Phenotypic variation among populations, as seen in the signaling traits of many species, provides an opportunity to test whether similar factors generate repeated phenotypic patterns in different parts of a species’ range. We investigated whether genetic divergence, abiotic gradients, and sympatry with closely related species explain variation in the dewlap colors of Amazon Slender Anoles, Anolis fuscoauratus. To this aim, we characterized dewlap diversity in the field with respect to population genetic structure and evolutionary...

Data on paternal age and sperm production of the progeny

Gabriele Sorci, Pauline Vuarin, Loïc Lesobre, Gwènaëlle Levêque, Michel Saint Jalme, Frédéric Lacroix & Yves Hingrat
Parental age has profound consequences for offspring’s phenotype. However, whether patrilineal age affects offspring sperm production is unknown, despite the importance of sperm production for male reproductive success in species facing post-copulatory sexual selection. Using a longitudinal dataset on ejaculate attributes of the houbara bustard, we showed that offspring sired by old fathers had different age-dependent trajectories of sperm production compared to offspring sired by young fathers. Specifically, they produced less sperm (-48%) in their...

Data from: Post-copulatory sexual selection allows females to alleviate the fitness costs incurred when mating with senescing males

Pauline Vuarin, Alice Bouchard, Loïc Lesobre, Gwénaëlle Leveque, Toni Chalah, Michel Saint-Jalme, Frédéric Lacroix, Yves Hingrat & Gabriele Sorci
Male senescence has detrimental effects on reproductive success and offspring fitness. When females mate with multiple males during the same reproductive bout, post-copulatory sexual selection that operates either through sperm competition or cryptic female choice might allow females to skew fertilization success towards young males and as such limit the fitness costs incurred when eggs are fertilized by senescing males. Here, we experimentally tested this hypothesis. We artificially inseminated female North African houbara bustards with...

Drosophila suzukii wing spot size is robust to developmental temperature

Ceferino Varón González, Antoine Fraimout & Vincent Debat
Phenotypic plasticity is an important mechanism allowing adaptation to new environments and as such it has been suggested to facilitate biological invasions. Under this assumption, invasive populations are predicted to exhibit stronger plastic responses than native populations. Drosophila suzukii is an invasive species whose males harbor a spot on the wing tip. In this study, by manipulating developmental temperature, we compare the phenotypic plasticity of wing spot size of two invasive populations with that of...

Mind the outgroup and bare branches in total-evidence dating: a case study of Pimpliform Darwin Wasps (Hymenoptera, Ichneumonidae)

Tamara Spasojevic, Ilari E. Sääksjärvi, Masato Ito, Stanislav Korenko, Seraina Klopfstein, Gavin R. Broad & Martin Schwarz
Taxon sampling is a central aspect of phylogenetic study design, but it has received limited attention in the context of total-evidence dating, a widely used dating approach that directly integrates molecular and morphological information from extant and fossil taxa. We here assess the impact of commonly employed outgroup sampling schemes and missing morphological data in extant taxa on age estimates in a total-evidence dating analysis under the uniform tree prior. Our study group is Pimpliformes,...

Data from: Phylogenomic data reveal reticulation and incongruence among mitochondrial candidate species in Dusky Salamanders (Desmognathus)

Robert Alexander Pyron, Kyle A. O'Connell, Emily Moriarty Lemmon, Alan R. Lemmon & David A. Beamer
Gene flow between evolutionarily distinct lineages is increasingly recognized as a common occurrence. Such processes distort our ability to diagnose and delimit species, as well as confound attempts to estimate phylogenetic relationships. A conspicuous example is Dusky Salamanders (Desmognathus), a common model-system for ecology, evolution, and behavior. Only 22 species are described; 7 in the last 40 years. However, mitochondrial datasets indicate the presence of up to 45 “candidate species” presenting a complex history of...

Repositories for taxonomic data: Where we are and what is missing

Aurélien Miralles, Teddy Bruy, Katherine Wolcott, Mark Scherz, Dominik Begerow, Bank Beszteri, Michael Bonkowski, Janine Felden, Birgit Gemeinholzer, Frank Glaw, Frank Oliver Glöckner, Oliver Hawlitschek, Ivaylo Kostadinov, Tim Nattkemper, Christian Printzen, Jasmin Renz, Nataliya Rybalka, Marc Stadler, Tanja Weibulat, Thomas Wilke, Susanne Renner & Miguel Vences
Natural history collections are leading successful large-scale projects of specimen digitization (images, metadata, DNA barcodes), transforming taxonomy into a big data science. Yet, little effort has been directed towards safeguarding and subsequently mobilizing the considerable amount of original data generated during the process of naming 15–20,000 species every year. From the perspective of alpha-taxonomists, we provide a review of the properties and diversity of taxonomic data, assess their volume and use, and establish criteria for...

Evolution and phylogeny of the deep-sea isopod families Desmosomatidae Sars, 1897 and Nannoniscidae Hansen, 1916 (Isopoda: Asellota)

Robert Jennings, Saskia Brix, Christoph Held, Stefanie Kaiser, Amy Driskell & Angelika Brandt
In the deep sea, the phylogeny and biogeography of only a few taxa have been well studied. Although more than 200 species in 32 genera have been described for the asellote isopod families Desmosomatidae Sars, 1897 and Nannoniscidae Hansen, 1916 from all ocean basins, their phylogenetic relationships are not completely understood. There is little doubt about the close relationship of these families, but the taxonomic position of a number of genera is so far unknown....

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