Results 41 to 50 of about 18,299 (291)

Anatomy and variation in the paraphyletic Mosasaurus lemonnieri assemblage from the Craie phosphatée de ciply, Belgium

open access: yesThe Anatomical Record, EarlyView.
Abstract Nineteenth century excavations of the Ciply‐Malogne Phosphatic Chalk Formation in Hainaut, Belgium, yielded over 50 partial mosasaur skeletons, the majority of which were referred to the species Mosasaurus lemonnieri Dollo, 1889. In the years since, this taxon has experienced a complicated taxonomic history, and its exceptional hypodigm has ...
Henry S. Sharpe   +3 more
wiley   +1 more source

The Complement of Projection Neurons Activated Determines the Type of Feeding Motor Program in Aplysia

open access: yesFrontiers in Neural Circuits, 2021
Multiple projection neurons are often activated to initiate behavior. A question that then arises is, what is the unique functional role of each neuron activated? We address this issue in the feeding system of Aplysia.
Colin G. Evans   +6 more
doaj   +1 more source

Redescription of †Eobrasilia coutoi (Metatheria: Polydolopimorphia), a unique sclerocarpophagous metatherian from the Palaeogene of South America: Systematic affinities, and paleoecological and evolutionary implications

open access: yesThe Anatomical Record, EarlyView.
Abstract The ‘Palaeogene strata’ of the Itaboraí Basin (upper Paleocene‐lower Eocene), Southeastern Brazil, has preserved 29 genera and almost 50 species of metatherians (about 65% of its mammalian diversity). Among them, Eobrasilia coutoi Simpson, 1947 is the most enigmatic due to its quite fragmentary nature.
Leonardo M. Carneiro   +10 more
wiley   +1 more source

Physico-chemical parameters of the habitat of molluscs, intermediate hosts of schistosomes, in Kisangani and its surroundings

open access: yesOrapuh Journal
Introduction Schistosomiasis, a neglected tropical disease, is caused by Schistosoma trematodes and is prevalent in 78 countries, particularly in sub-Saharan Africa.
KANGANGA John Sapu   +5 more
doaj   +1 more source

Maintenance of Octopus vulgaris Type II paralarvae in an estuarine area

open access: yesRevista Brasileira de Zootecnia, 2018
We assessed the survival of paralarvae kept in a floating wooden box attached to an oyster extensive cultivation system with no extra food supply. A total of 7700 newly hatched paralarvae were maintained in a 10.5-L floating box (7 cm height × 30 cm ...
Penélope Bastos, Graziela Cleuza Vieira
doaj   +1 more source

The evolution of mollusc shells [PDF]

open access: yesWIREs Developmental Biology, 2018
Molluscan shells are externally fabricated by specialized epithelial cells on the dorsal mantle. Although a conserved set of regulatory genes appears to underlie specification of mantle progenitor cells, the genes that contribute to the formation of the mature shell are incredibly diverse.
McDougall, Carmel, Degnan, Bernard M.
openaire   +5 more sources

Bioerosion traces in bones reveal an increase in ethological diversity in the insect exploitation of carcasses in the late Triassic

open access: yesThe Anatomical Record, EarlyView.
Abstract This study presents the first detailed description of bioerosion traces produced by insects in bones from the Santa Cruz Sequence (early Carnian, Santa Maria Supersequence, Brazil). An array of traces is reported, consisting of notches, a tube, trails of grooves attributed to the ichnotaxon Osteocallis mandibulus and ornamented depressions ...
Lucca S. Cunha   +2 more
wiley   +1 more source

Comparative immunogenomics of molluscs [PDF]

open access: yesDevelopmental & Comparative Immunology, 2017
Comparative immunology, studying both vertebrates and invertebrates, provided the earliest descriptions of phagocytosis as a general immune mechanism. However, the large scale of animal diversity challenges all-inclusive investigations and the field of immunology has developed by mostly emphasizing study of a few vertebrate species.
Jonathan H, Schultz, Coen M, Adema
openaire   +2 more sources

Comparative Meta‐Analysis of Antimicrobial Peptides in Aquatic and Terrestrial Livestock Species

open access: yesAnimal Research and One Health, EarlyView.
A global meta‐analysis of 58 studies (926 effect sizes and 29 species across five taxa) revealed that dietary antimicrobial peptides generally improve growth performance, blood metabolites, and immune responses. The greatest benefits were observed in omnivorous livestock, such as pigs and chickens. Dose‐duration effects were evident. An optimal outcome
Lily Liu   +4 more
wiley   +1 more source

Data on the recent mollusc fauna of the Fekete Hill (Villány Hills, S Hungary) [PDF]

open access: yes, 1999
Mollusc assemblages of the Fekete Hill (5 sampling areas) were analysed on the basis of 20 soil samples taken in the years 1997–1999.
Sólymos, Péter
core   +1 more source

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