Revision of Eocene electric rays (Torpediniformes, Batomorphii) from the Bolca Konservat-Lagerst atte, Italy, reveals the first fossil embryo in situ in marine batoids and provides new insights into the origin of trophic novelties in coral reef fishes
Author
Marram ̀, Giuseppe
University of Vienna, Department of Palaeontology, Althanstrasse 14, 1090, Vienna;
Author
Claeso, Kerin M.
Author
Carneval, Giorgio
Author
Kriwe, Jurgen
text
Journal of Systematic Palaeontology
2018
2017-09-21
16
14
1189
1219
http://dx.doi.org/10.1080/14772019.2017.1371257
journal article
10.1080/14772019.2017.1371257
1478-0941
PMC6130837
30210265
10883262
EDD6E170-CA64-4FFB-8DD1-AED2D61D5504
Family
Narcinidae
Gill, 1862
Diagnosis (emended).
Medium to large-sized narcinoid electric rays sharing three synapomorphies: presence of rostral fontanelle, reduced number of ribs (up to 10 pairs), and rostral cartilage connected to the antorbital cartilages through lateral rostral appendices. Additionally, narcinids possess the following combination of characters: palatoquadrate labiolingually compressed and tapered towards the symphysis; small subtriangular labial cartilages close to symphysis; rostral cartilage expanded and trough-shaped; large and rounded basibranchial copula with small caudal tab; tooth cusps and roots narrow and high; long precaudal tail; two dorsal fins.
Included genera.
Benthobatis
Alcock, 1898
;
Diplobatis
Bigelow & Schroeder, 1948
;
Discopyge
Heckel, 1846
;
Narcine
Henle, 1834
; †
Titanonarke
Carvalho, 2010
.