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It closely resembles E. electricus but differs in skull morphology, including having a depressed skull and a wide head. It has a maximum voltage of 860 volts, making it not only the strongest bioelectricity generator of the three electric eel species, but also of any animal. [3] Males get larger than females by about 35 cm (14 in).
CranID is a free software program that utilizes multivariate linear discriminant analysis and nearest neighbor discriminant analysis in conjunction with 29 cranial measurements to assess the geographic origin, which can be used to infer the ancestry of an unknown cranium. CranID compares an unknown cranium with 74 geographic samples, from 3,163 ...
Laboury et al. (2024) compare the evolution of morphology and body size of ichthyopterygians and eosauropterygians from the Middle Triassic to the Early Jurassic, finding evidence of diversification into three clades with clearly distinct skull and teeth morphologies in the latter group but not in the former one, and finding no evidence for an ...
It consists of a partial skeleton with skull. It contains a partial skull with lower jaws, three neck vertebrae, three back vertebrae, a piece of a sacral vertebra, four partial tail vertebrae, ribs, the lower end of a thighbone, the upper ends of a shinbone and calf bone, a second metatarsal and three toe phalanges.
The squamosal is a skull bone found in most reptiles, amphibians, and birds. In fishes, it is also called the pterotic bone. [1] In most tetrapods, the squamosal and quadratojugal bones form the cheek series of the skull. [2] The bone forms an ancestral component of the dermal roof and is typically thin compared to other skull bones. [3]
An anapsid is an amniote whose skull lacks one or more skull openings (fenestra, or fossae) near the temples. [1] Traditionally, the Anapsida are considered the most primitive subclass of amniotes, the ancestral stock from which Synapsida and Diapsida evolved, making anapsids paraphyletic. It is, however, doubtful that all anapsids lack ...
A study on the skull morphology of Koskinonodon perfectum, Dutuitosaurus ouazzoui, Metoposaurus diagnosticus and Eocyclotosaurus appetolatus, providing evidence which might be indicative of the presence of sexual dimorphism in the studied taxa, is published by Rinehart & Lucas (2023). [164]
This type of skull morphology primarily acts to protect the animal against predators, and in doing so, leads to an indirect enhancement of water balance within the body. [ 3 ] In the study conducted by Jared et al. (1999) and Navas, Jared & Antoniazzi (2002), C. greeningi demonstrated the ability to enter test tubes backwards and close the ...