STABILITY IN THE NUMBER OF CERVICAL VERTEBRAE IS A PROXY FOR HIGH METABOLIC RATE AND EARLY ORGANOGENESIS IN THERAPSIDS AND PTEROSAURSROWLAND, Stephen M
The number of vertebrae including cervical, thoracic, lumbar, sacral and caudal vertebrae shows developmental constraint in most vertebrates1. For instance, the numbers of cervical and sacral vertebrae are respectively fixed at 7 and 4 in mammals. However, the number of thoracic and lumbar vertebrae...
In mammals, the vertebral formula shows developmental constraint [1]. The number of cervical vertebrae is fixed at 7, and the total number of thoracic and lumbar vertebrae tends to be 19, although the specific counts vary among species. For example, in the Monotremata, Marsupialia, Lagomorpha...
Mayer-Rokitansky-Küster-Hauser (MRKH) syndrome is a rare disease, characterised by the aplasia of vagina and uterus in women with a 46,XX karyotype. Most cases are sporadic, but familial recurrence has also been described. Herein, we investigated an Italian cohort of 36 unrelated MRKH patients...
However, increased rib number can affect mutton production because of their larger size, and ribs are favored by consumers in the mutton sales market; therefore, it is of great significance to study how to increase the number of ribs in lambs. Sheep vertebrae can be divided into cervical, ...
Cervical ribs were found in 2 (0.2%) patients while LSTV were found in 250 (25.1%) of patients. The odds of 13 thoracic vertebrae were higher in males (OR 5.17; 95% CI: 1.25, 21.39) and the odds of 6 lumbar vertebrae were higher in LSTV (OR 3.93; 95% CI: 2.58, 6.00). In ...
Bennett, S.C. (2014) A new specimen of the pterosaur Scaphognathus crassirostris, with comments on constraints of cervical vertebrae number in pterosaurs. Neues Jahrbuch fur Geologie und Palaontologie,Abhandlun...