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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 ...
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.
A human skull and measurement device from 1902. Craniometry is measurement of the cranium (the main part of the skull), usually the human cranium.It is a subset of cephalometry, measurement of the head, which in humans is a subset of anthropometry, measurement of the human body.
Within the Osteichthyan diversification, there were no changes related to respiration in the transition as can be seen by the nasal region and palatal morphology in elpistostegalid fishes. The primary change from basic ostelepiform ancestors to the first elpistostegalid in the middle Devonian was to the pre-existing roof skulls. [6]
Cranial kinesis is the term for significant movement of skull bones relative to each other in addition to movement at the joint between the upper and lower jaws. It is usually taken to mean relative movement between the upper jaw and the braincase. [1] Most vertebrates have some form of a kinetic skull. [1]
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 ...
Holotype skull of Bulbasaurus viewed from above. The nasal bones, which form the roof the snout, bear a pair of enlarged bosses of bone as in other cryptodontians. [8] In contrast to the small, oval-shaped, relatively narrow, and smooth-textured bosses of Tropidostoma, the roughened bosses of Bulbasaurus are very large and nearly form a single continuous boss (although a narrow strip of the ...