embyonic development of the loggerhead seaturtle

Gnathoschisis (cleft palate) is the prevalent craniofacial malformation in green, loggerhead and olive ridley sea turtles caused by an incorrect fusion of the medial nasal and maxillary prominences and frontonsal mass deriving from mesenchymal and neural crest cells Neural tube somites (up to 17) amnion covers half of the embryo germ layers amniotic cap otic vesicle first pharyngeal cleft development of the head, brain, heart, and blood vessels The neural plate folds and transforms into the neural tube somites form from the paraxial mesoderm of the neurulating embryo The egg is rich in lipid proteins and is ovoposited in middle gastrula stage depending on the exposure to a teratogenic factors (such as extreme temperatures), embryonic development may be halted Primitive streak trilaminar embryonic disc composed of endoderm, ectoderm, and mesoderm notochordal plate neural groove neural folds head fold

Prevalent Affectations in Sea Turtles Due to Teratogenic Agentsįertilisation-Gastrulation-Early NeurulationĪfter fertilisation, the zygote undergoes cleavage to form a blastocyst the blastula is reorganised into a trilaminar structure. with the permission of the author and the publisher (CCB, Allen Press Publishing Services) scale bar = 1 mm for stages 7–20 5 mm for stage 25 10 mm for stages 26–31 arrows indicate key characteristics.

Summary of embryonic development of sea turtles (stages, processes, and main morphological traits) according to and prevalent affectations in sea turtles due to teratogenic agents.

Embyonic development of the loggerhead seaturtle