Results 141 to 150 of about 18,679,151 (297)

Dental crown morphological variation and heterodonty in carcharhiniform sharks

The Anatomical Record, EarlyView.
Abstract Elasmobranch teeth are highly mineralized structures that constitute the majority of the fossil record for this group. Despite their taxonomic and evolutionary significance, detailed descriptions of dental morphology remain scarce. The order Carcharhiniformes, the most diverse among sharks, comprises 304 valid species that display remarkable ...
Flávia Zanini, Karla D. A. Soares
wiley   +1 more source

THE GUATTERIA GROUP DISENTANGLED: SINKING GUATTERIOPSIS, GUATTERIELLA, AND HETEROPETALUM INTO GUATTERIA

Rodriguésia
The Guatteria group (Annonaceae) consists of four genera: Guatteria, Guatteriopsis, Guatteriella, and Heteropetalum. Morphological data have for long suggested a close affinity between these genera.
Roy H. J. Erkens, Paul J. M. Maas
doaj   +1 more source

Bombus (Pyrobombus) johanseni Sladen, 1919, a valid North American bumble bee species, with a new synonymy and comparisons to other "red-banded" bumble bee species in North America (Hymenoptera, Apidae, Bombini). [PDF]

Zookeys, 2020
Sheffield CS, Oram R, Heron JM.
europepmc   +1 more source

Hypogean pseudoscorpions (Arachnida) from Jaén province (Andalusia, Spain), with descriptions of four new species and a new synonymy

, 2013
Zaragoza, Juan A., Pérez, Toni (2013): Hypogean pseudoscorpions (Arachnida) from Jaén province (Andalusia, Spain), with descriptions of four new species and a new synonymy. Zootaxa 3700 (2): 201-225, DOI: 10.11646/zootaxa.3700.2.
Pérez, Toni, Zaragoza, Juan A.
core   +1 more source

Rethinking brachycephaly: Anatomical implications and health considerations in lagomorphs

The Anatomical Record, EarlyView.
Abstract Brachycephaly in domestic rabbits is increasingly perceived by welfare organizations as associated with significant health complications, particularly oral pathologies. Despite this perception, comparative anatomical research into rabbit brachycephaly is limited compared to that of dogs and cats, compelling an in‐depth examination of its ...
Helaina Cressy, Alice Nishigaki, Matthew C. Gage, Renato L. Previdelli   +3 more
wiley   +1 more source

Notes on Early Land Plants Today. 22. New combinations and new synonymy in Omphalanthus and Aureolejeunea (Lejeuneaceae, Marchantiophyta)

, 2013
Gradstein, S. Robbert (2013): Notes on Early Land Plants Today. 22. New combinations and new synonymy in Omphalanthus and Aureolejeunea (Lejeuneaceae, Marchantiophyta).
Gradstein, S. Robbert
core   +1 more source

The internal crest anatomy of Lambeosaurini (Hadrosauridae: Lambeosaurinae)

The Anatomical Record, EarlyView.
Abstract The supracranial crests of lambeosaurine hadrosaurids have long been a focus of study due primarily to their extreme morphology. The external anatomy of lambeosaurine crests is understood to be highly variable between species, but variation in their internal anatomy is less well understood.
Thomas W. Dudgeon, Courtney Brown, David C. Evans   +2 more
wiley   +1 more source

Taxonomic study of Chinese species of the genus Macropsis (Hemiptera: Cicadellidae: Macropsinae): new species, new records, synonymy and replacement name

, 2012
Li, Hu, Dai, Ren-Huai, Li, Zi-Zhong, Yu, Dmitri (2012): Taxonomic study of Chinese species of the genus Macropsis (Hemiptera: Cicadellidae: Macropsinae): new species, new records, synonymy and replacement name.
Li, Hu, Li, Zi-Zhong, Dai, Ren-Huai, Yu, Dmitri   +3 more
core   +1 more source

A critical reappraisal of the carotid sinus and carotid bulb: Distinguishing neurohistological function from vascular geometry

The Anatomical Record, EarlyView.
This review redefines the carotid bulb (CB) as a variable geometric dilation shaped by hemodynamics and the carotid sinus (CS) as a conserved neurohistological baroreceptor field. Distinguishing these entities clarifies a century of anatomical confusion and links geometry, neurohistology, and clinical interpretation within a unified framework ...
Răzvan Costin Tudose, Nicolae Radu, Mugurel Constantin Rusu   +2 more
wiley   +1 more source

Four new species and additional records of Geostiba from Turkey and Crete, and a new synonymy (Coleoptera: Staphylinidae: Aleocharinae)

, 2007
Assing, V. (2007): Four new species and additional records of Geostiba from Turkey and Crete, and a new synonymy (Coleoptera: Staphylinidae: Aleocharinae).
Assing, V.
core   +1 more source