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Development of Embryonic Gill Vasculature in the Yellow Stingray, Urobatis Jamaicensis
Author(s) -
Basten Bethany L.,
Sherman Robin L.,
Lametschwandtner Alois,
Spieler Richard E.
Publication year - 2011
Publication title -
the anatomical record: advances in integrative anatomy and evolutionary biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.678
H-Index - 62
eISSN - 1932-8494
pISSN - 1932-8486
DOI - 10.1002/ar.21430
Subject(s) - dorsal aorta , anatomy , yolk sac , biology , dorsum , stingray , embryogenesis , gill , aorta , embryo , medicine , embryonic stem cell , fish <actinopterygii> , microbiology and biotechnology , zoology , fishery , biochemistry , gene
Corrosion casting was utilized to examine the development of gill vasculature in embryonic yellow stingrays, Urobatis jamaicensis (formerly Urolophus jamaicensis ). The most marked changes in vascular configuration of the gills occur in the earliest castable stages of gestation. These changes included development of afferent external gill filament vessels and progression from paired dorsal aortae to a single fused dorsal aorta. Internal gill vasculature was found to nearly match that of an adult by the time the external gill filaments had fully regressed and yolk sac had been exhausted (>47 mm disc width). Examination of embryo casts also revealed characteristics of the branchial vasculature not previously reported in adult specimens. These include the presence of pre‐lamellar sphincters, intertrematic branches, afferent distributing arteries, which supply blood to many afferent filament arteries resulting in greater interconnection of the filaments, and observation that the afferent branchial artery in the first hemibranch supplies blood directly to afferent filament arteries on the dorsal half of this arch. Anat Rec, 2011. © 2011 Wiley‐Liss, Inc.