Ossification Pattern in Forelimbs of the Siamese Crocodile (Crocodylus siamensis): Similarity in Ontogeny of Carpus Among Crocodylian Species

0493019 - FGÚ 2019 RIV US eng J - Článek v odborném periodiku
Gregorovičová, Martina - Kvasilová, A. - Sedmera, David
Ossification Pattern in Forelimbs of the Siamese Crocodile (Crocodylus siamensis): Similarity in Ontogeny of Carpus Among Crocodylian Species.
Anatomical Record-Advances in Integrative Anatomy and Evolutionary Biology. Roč. 301, č. 7 (2018), s. 1159-1168. ISSN 1932-8486. E-ISSN 1932-8494
Grant CEP: GA ČR(CZ) GA16-02972S
Institucionální podpora: RVO:67985823
Klíčová slova: embryo * hand * limb development * morphology * skeleton
Obor OECD: Anatomy and morphology (plant science to be 1.6)
Impakt faktor: 1.329, rok: 2018

Crocodylians have highly derived elongated carpus, which is related to their use of forelimbs in many types of gaits as well as in burrowing. The objective of present study was to describe the ossification of the forelimb in five stages of Siamese crocodile (Crocodylus siamensis). The ossification begins approximately at stage 20 in arm and forearm bones moving sequentially to the metacarpal elements. The first carpal elements with ossification centers are radiale + intermedium and ulnare (stage 22–23), and their ossification mode is typical of long bones. Between stages 22 and 24 distal carpals 3, 4, and 5 fuse together to a single formation. In the stage 25, the ossification proceeds to the pisiform, which starts ossifying late during the embryogenesis. The phalangeal formula of the digits is 2,3,4,5,3. Although there are some interspecific differences, it appears that all crocodylians have similarly uniform skeletal pattern, the process of ossification, number of carpal elements and phalangeal formulas probably due to their similar lifestyles.
Trvalý link: http://hdl.handle.net/11104/0286489