CORONARY-ARTERY ANATOMY AND ELASMOBRANCH PHYLOGENY

Citation
R. Munozchapuli et al., CORONARY-ARTERY ANATOMY AND ELASMOBRANCH PHYLOGENY, Acta Zoologica, 75(3), 1994, pp. 249-254
Citations number
17
Categorie Soggetti
Zoology
Journal title
ISSN journal
00017272
Volume
75
Issue
3
Year of publication
1994
Pages
249 - 254
Database
ISI
SICI code
0001-7272(1994)75:3<249:CAAEP>2.0.ZU;2-H
Abstract
The anatomical arrangements of the coronary arteries were compared in 36 species from eight orders of elasmobranchs and one species of holoc ephalians, Two main patterns of the coronary trunks are defined in the conus arteriosus. A dorsal and a ventral coronary trunk are present i n lamnoid and carcharhinoid representatives (except in scyliorhinids), while two lateral coronary trunks are always observed in the holoceph alian, hexanchoid, squaloid, squatinoid, scyliorhinid and batoid repre sentatives. Posterior coronary arteries arising from subclavian branch es are recorded only in rajoid and myliobatoid specimens. We propose t hat both the dorsoventral coronary trunk pattern and the presence of p osterior coronary arteries are apomorphic. Thus, the phylogenetic anal ysis of these character-states supports the view that lamnoids are the sister-group of advanced carcharhinoids (carcharhinids and sphyrnids) , sharing the dorsoventral coronary trunk pattern as a synapomorphy.