Unexpected diversity of Isidoides (Anthozoa: Octocorallia: Isidoidae) revealed by morphology and phylogenomic analysis with descriptions of three new species

By integrating morphological and phylogenomic analyses of 23 specimens from the Pacific, this study reveals that the rare octocoral genus *Isidoides* actually comprises four distinct species—including three newly described ones—rather than a single species, while demonstrating that ultraconserved elements (UCEs) provide superior resolution for species discrimination compared to traditional genetic markers.

Xu, Y., Bilewitch, J., Pante, E. + 4 more2026-04-09🐾 zoology

Pigments and microstructure of the colour polymorphic shells of Polymita picta and P. muscarum (Gastropoda: Cepolidae), with observations on a new light-transmitting shell spot system

This study elucidates the pigmentary and microstructural mechanisms underlying the colour polymorphism in Cuban painted snails (*Polymita picta* and *P. muscarum*), revealing a novel light-transmitting shell spot system driven by mixed melanin-carotenoid pigments and disordered porous mineral arrangements that likely serve roles in photoprotection and thermoregulation.

Gordillo-Perez, M. J., Beenaerts, N., Sigwart, J. + 7 more2026-04-09🐾 zoology

COMPARATIVE EFFECTS OF FLAXSEED SUPPLEMENTATION ON HEMATOLOGICAL PARAMETERS, LIPID PROFILE AND IMMUNITY OF MALE RABBIT

This study demonstrates that supplementing the diets of male rabbits with flaxseeds, particularly at an 8% concentration, significantly improves hematological parameters, enhances immunity against Rabbit Hemorrhagic Disease Virus, and optimizes lipid profiles by lowering harmful cholesterol and triglycerides while increasing HDL-C.

Kanwal, A., Iqbal, R., Farhan, F. + 1 more2026-04-08🐾 zoology

Radiographic assessment of bone maturation as a tool for age estimation in common dolphins (Delphinus delphis)

This study establishes a highly accurate, non-invasive radiographic framework for estimating the chronological age of common dolphins (*Delphinus delphis*) by analyzing pectoral flipper ossification patterns, which outperforms existing epigenetic methods and provides a vital tool for conservation management.

Hanninger, E.-M. F. F., Barratclough, A., Betty, E. L. + 6 more2026-04-07🐾 zoology

Forensic Identification of Confiscated Helmeted Hornbill (Rhinoplax vigil) Casques and Implications for Individual Quantification in Wildlife Crimes

This study proposes a more accurate forensic method for quantifying helmeted hornbill individuals in wildlife trafficking cases by prioritizing anatomical uniqueness and DNA barcoding over traditional weight-based estimates, while establishing an 85g threshold for heavily processed specimens to improve legal outcomes.

Shen, Y., He, K., Wang, W. + 2 more2026-04-06🐾 zoology

Investigating cognitive enrichment for dairy calves through behavioral measures of participation and engagement: a pilot study

This pilot study demonstrates that weaned dairy calves voluntarily and consistently engage with puzzle box cognitive enrichment, exhibiting sustained participation and increased natural exploratory behaviors compared to controls, thereby supporting the potential of early cognitive enrichment to enhance learning and development in cattle.

Amarioarei, G., Cellier, M., Aigueperse, N. + 4 more2026-04-04🐾 zoology

Intertidal Gastropods (Gastropoda: Mollusca): Insights on diversity and distribution in the Mumbai Metropolitan Region, India

This study utilizes a decade-long citizen science project to document the diversity and distribution of 163 gastropod species across 28 intertidal sites in the Mumbai Metropolitan Region, revealing numerous new records and rediscoveries while demonstrating the effectiveness of low-cost citizen science for addressing taxonomic data gaps.

Ansari, R. M., Patade, P., Modi, S.2026-03-30🐾 zoology

Extreme disparity in the appendicular skeleton of domestic dogs (Canis familiaris)

This study utilizes 3D landmark-free morphometrics to reveal that while most domestic dog breeds share strikingly similar limb bone shapes, Dachshunds exhibit extreme and unique morphological disparity and variation that has intensified over the last 150 years, highlighting the need for breed-specific approaches to understanding postcranial diversity and improving canine welfare.

Roberts, L. E., Binfield, O. F., Charles, J. P. + 3 more2026-03-25🐾 zoology

Reassessing display behavior from Bels et al. (2025) given the complexity of anthropogenic hybridization and intraspecific diversity in Iguana iguana

This paper reanalyzes and critiques Bels et al. (2025) by demonstrating that their oversimplified classification of non-native *Iguana iguana* populations obscured significant behavioral variation driven by anthropogenic hybridization and intraspecific diversity, ultimately revealing that display patterns in Guadeloupe retain characteristics from their specific South American origins.

van den Burg, M. P., Thibaudier, J.2026-03-23🐾 zoology

Behavioral characteristics of an extremely old rhesus macaque in a zoo: Dementia-like symptoms and implications for quality of life of geriatric animals

This study documents the behavioral changes, gait alterations, and quality of life of an extremely old rhesus macaque with post-mortem evidence of Alzheimer's-like pathology, highlighting potential signs of physical and cognitive decline while emphasizing the need for further controlled testing to confirm dementia in geriatric primates.

Yamanashi, Y., Bando, H., Niimi, K. + 3 more2026-03-19🐾 zoology

A holistic survey of small mammal diversity across an iconic Madrean Sky Island (Santa Catalina Mountains, Arizona, USA)

This paper presents a holistic survey of small mammal diversity across the Santa Catalina Mountains conducted from 2021 to 2023, which documented 15 species, extended the known elevational ranges for eight of them, and established a comprehensive model of voucher and non-lethal tissue sampling to address historical data gaps and support future eco-evolutionary research in the Madrean Sky Islands.

Rowsey, D. M., Smith, S. M., Zamora Chavez, L. J. + 9 more2026-03-18🐾 zoology

Assessing the impact of gamma irradiation on key biological traits of peach fruit fly, Bactrocera zonata (Diptera: Tephritidae) under laboratory conditions

This study demonstrates that gamma irradiation induces dose-dependent sterility and developmental abnormalities in *Bactrocera zonata*, identifying 70 Gy as a potentially optimal dose for inducing male sterility while causing complete female sterility at lower doses, thereby supporting its potential application in sterile insect technique programs.

Shah, S. J. A., Hajra, B., Khan, M. H. + 6 more2026-03-17🐾 zoology

Investigating the use of human COVID-19 rapid assays to detect antibody and antigen in domesticated dogs (Canis lupus familiaris) and cats (Felis catus)

This study evaluated the efficacy of human COVID-19 rapid antigen and antibody tests on domesticated dogs and cats, finding that while these kits exhibit variable sensitivity and specificity compared to gold-standard methods, they may still offer utility for field surveillance in the absence of species-specific assays.

Cybulska, L. C., Hamer, S. A., Teasdale, C. + 3 more2026-03-13🐾 zoology