Results 11 to 20 of about 453 (68)

Gene and Genome Duplication in Spiders. [PDF]

J Exp Zool B Mol Dev Evol
In chelicerates whole genome duplications (WGDs) were identified in distinct groups. While there is evidence that Xiphosurans/horseshoe crabs had three rounds of WGD and arachnopulmonates (e.g. spiders and scorpions) had one WGD, in many other arachnid groups no WGD was identified.
Munegowda C, Pechmann M, Prpic-Schäper NM, Turetzek N.   +3 more
europepmc   +2 more sources

Crushing and Cutting: Shape Variation and Morphological Integration Between the Claws of Two Swimming Crab Species (Brachyura: Portunidae)

Acta Zoologica, EarlyView.
ABSTRACT This study investigated shape variations and morphological integration between the components of crusher and cutter claws in two species of swimming crabs, Callinectes danae and Callinectes ornatus. The propodi and dactyli of the claws were analysed in males and females of both species, using geometric morphometric techniques to identify ...
Julia Tadiotto, Alexandre Ribeiro da Silva, Julia Fernandes Perroca, Rogerio Caetano Costa, Caio Santos Nogueira   +4 more
wiley   +1 more source

Height and phytotelm size affect the invertebrate communities of epiphytic bromeliads in the Amazon rainforest

Ecological Entomology, EarlyView.
The height at which epiphytic bromeliads are found affects the invertebrate community composition within them. The size of epiphytic bromeliads is positively correlated with species richness of both aquatic and terrestrial invertebrates. Whether bromeliads were found in primary or secondary forest did not have a significant effect on the community of ...
Xaali O'Reilly‐Berkeley, Alex Pazmiño‐Palomino, Andrea Hidalgo‐Cárdenas, Sofía I. Trujillo‐Regalado, Hannah Mossman, Jennifer K. Rowntree, Richard F. Preziosi   +6 more
wiley   +1 more source

River Barriers and Spatial Constraints: Unveiling the Factors Shaping Species Distribution in the Amazonian Rainforest

Journal of Biogeography, EarlyView.
ABSTRACT Aim We aimed to quantify the relative contributions of geographic distance, environmental variation, and riverine barriers to shaping species distributions across the Amazon forest. Location Amazon forest, Brazil. Time Period Present. Major Taxa Studied Class Arachnida; Order: Opiliones (harvestmen).
Cristian de Sales Dambros, Elisa Leal Abbad, Pio Antonio Colmenares Garcia, Ana Lúcia Tourinho   +3 more
wiley   +1 more source

Beetle Pollination in the Holoparasitic Lophophytum pyramidale (Balanophoraceae): A New Case of Brood‐Pollination Mutualism?

Journal of Applied Entomology, EarlyView.
ABSTRACT Beetle pollination is considered an ancestral trait in angiosperms, retained in a few specialised families engaging in longstanding interactions with ancient groups of beetles. While beetles represent some of the earliest angiosperm pollinators, there is also increasing evidence that some beetle‐pollinated plants represent a derived condition.
Alexandre da Silva Medeiros, Priscila Andre Sanz‐Veiga, João Marcelo Alvarenga Braga, Izar Aximoff, André Silva Roza, Isabel DiStefano, Bruno A. S. de Medeiros, Felipe W. Amorim   +7 more
wiley   +1 more source

Alone no more—Integrative taxonomy of New Zealand odd‐clawed spiders challenges the monotypy of Pianoa and Gradungula (Araneae: Gradungulidae)

Systematic Entomology, EarlyView.
Taxonomic revision of New Zealand Gradungulidae reveals unexpected northern South Island diversity through integrated molecular phylogenetics and targeted field sampling. Two new species formally described — Gradungula kahurangi sp. nov. and Pianoa civis sp. nov. — with revised male genitalia diagnoses for all three New Zealand genera.
Peter Michalik, Cor J. Vink, Martin J. Ramírez, Tim M. Dederichs, Phil J. Sirvid, Stephen M. Pawson, Danilo Harms   +6 more
wiley   +1 more source

Sexual conflict as a constraint on asexual reproduction: an empirical review

Biological Reviews, Volume 100, Issue 6, Page 2681-2706, December 2025.
ABSTRACT Theory predicts that facultatively asexual animals, which can leverage the advantages of both sexual and asexual reproduction, should outcompete obligately sexual and obligately asexual animals. Yet, paradoxically, obligate sexual reproduction predominates in many animal lineages, while the most flexible form of facultative asexuality (i.e ...
Daniela Wilner, Russell Bonduriansky, Nathan W. Burke   +2 more
wiley   +1 more source

Riparian Vegetation and Arthropod Responses to Dam Removal and Habitat Restoration Along the Kalamazoo River, Michigan, USA

River Research and Applications, Volume 41, Issue 9, Page 2017-2031, November 2025.
ABSTRACT Riparian ecosystems harbor diverse biota and provide numerous services to rivers including mitigating sediment run‐off, regulating temperature, and contributing food‐web subsidies. Dams are a major threat to riparian communities, but dam removal and riparian restoration efforts have the potential to restore these communities and the services ...
Sara N. Diller, Tiffany A. Schriever
wiley   +1 more source

Amid the fallen leaves: Intense collecting in the Northern Atlantic Forest reveals new minute harvestmen species (Opiliones: Stygnidae) within the Area of Endemism of Pernambuco

Austral Entomology, Volume 64, Issue 4, November 2025.
Abstract Stygnids represent one of the most diverse harvestman families, with many endemic species in the Area of Endemism of Pernambuco, a pattern increasingly evident by intensified sampling in the region over the years. The area is also recognised for hosting a group of understudied minute leaf‐litter dwellers stygnids, represented by the following ...
Nícolas E. V. Saraiva, Ricardo Pinto‐da‐Rocha, Marcio B. DaSilva   +2 more
wiley   +1 more source

Vegetation Structure and Soil Composition Influence Opiliones Diversity Across Spatial Scales in Amazonia

Biotropica, Volume 57, Issue 6, November 2025.
We examined how vegetation structure and soil composition influence the diversity and distribution of Opiliones across spatial scales in Central Amazonia. At the local scale, trees provided the richest microhabitats, strongly shaping species richness and composition, while at the regional scale, soil sand content was the main driver of species turnover.
Aléxia B. Rodrigues, Elisa L. Abbad, Pio A. Colmenares, Ana L. Tourinho, Fabrício B. Baccaro, Cristian S. Dambros   +5 more
wiley   +1 more source