Eogaleus bolcensis

CAPPETTA, 1975


Classification: Elasmobranchii Carcharhiniformes Carcharhinidae

Reference of the original description
CAPPETTA, H. (1975)
Les Sélaciens éocènes du Monte-Bolca. I - Les Carcharhinidae. Miscellanea Paleontologica. Studi e ricerche sui giacimenti Terziari di Bolca, 2: 279–305, 12 fig., pl. 1–8.

Synonyms / new combinations and misspellings
Alopiopsis plejodon

Types
Eogaleus bolcensis
Holotype: MCSNV: T.331;
Alopiopsis plejodon
Holotype: MCSNV: destroyed during the Second World War;

Images of types

Description:


Citation: Eogaleus bolcensis CAPPETTA, 1975: In: Database of fossil elasmobranch teeth www.shark-references.com, World Wide Web electronic publication, Version 06/2021

Please send your images of "Eogaleus bolcensis" to info@shark-references.com

Eogaleus bolcensis Cappetta, 1975, Eocene Bolca Konservat-Lagerstätte, MCSNV T.331, holotype; © Giuseppe Marramà, Università degli Studi di Torino, Italy

Description
Emended diagnose after Marramà et al. (2018) p. 446 [26259]: A carcharhinid shark with bulky head andshort, broad and rounded snout, not pointed or trian-gular; preoral length much smaller than mouth width;first dorsal fin located in front of the mid-length of thebody; its base equidistant from pectoral- and pelvic-finbases; height of first dorsal fin roughly equals the lengthof its base; posterior margin of first dorsal fin located wellanterior to pelvic-fin insertion; second dorsal fin well-developed and inserting close to anal-fin origin and about2/3 as high as the first dorsal fin; pectoral fin almostequals the size of first dorsal fin and containing about18–19 radials; postero-ventral margin of caudal fin deeplyincised; 135–153 vertebrae of which 50–55 monospondy-lous precaudal, 25–35 diplospondylous precaudals, and60–65 caudals; gradient monognathic and marked dig-nathic heterodonty; about 15 tooth files per half jaw in bothjaws (total row count 30/30); teeth small, not exceeding12 mm in total height; distal cusplets on lower and upperjaw teeth; lower anterior teeth with weakly mesio-distallyexpanded crown and a high central cusp, slightly bentlingually; labial face strongly convex, overhanging labialface of root by a distinct bulge; distal heels of lower lat-eral teeth bearing up to four cusplets; teeth with markedsigmoid profile and strongly convex lingual face of cusp;upper teeth with comparatively higher and wider crownand root; distal heel high and oblique, bearing one to fourstrong cusplets; basal edge of root broad, not rectilinear,with a distinct and deep nutritive furrow; dermal denticleson pectoral fins rounded or subrhombic, relatively smalland not ornamented; rhombic placoid scales of trunk andcaudal fin bearing 5–6 prominent longitudinal ridges withectodermal pits along their posterior edge.

Remarks
valid after Marramà et al. (2018) p. 287 [25955]; Marramà et al. (2018) p. 446 [26259]


References
CONTE, G.L. & TREVISANI, E. & GUASCHI, P. & FANTI, F. (2020)
New specimen of the rare requiem shark Eogaleus bolcensis from the Bolca Lagerstätte, Italy. Acta Palaeontologica Polonica, 65 (3): 547-560
DOI: 10.4202/app.00725.2020
MARRAMÀ, G. & CARNEVALE, G. & KRIWET, J. (2018)
New observations on the anatomy and paleobiology of the Eocene requiem shark †Eogaleus bolcensis (Carcharhiniformes, Carcharhinidae) from Bolca Lagerstätte, Italy. Comptes Rendus Palevol, 17 (7): 443-459
DOI: 10.1016/j.crpv.2018.04.005
MARRAMÀ, G. & CARNEVALE, G. & ENGELBRECHT, A. & CLAESON, K.M. & ZORZIN, R. (2018)
A synoptic review of the Eocene (Ypresian) cartilaginous fishes (Chondrichthyes: Holocephali, Elasmobranchii) of the Bolca Konservat-Lagerstätte, Italy. Paläontologische Zeitschrift, 92 (2): 283-313
DOI: 10.1007/s12542-017-0387-z
CARNEVALE, G. & BANNIKOV, A.F. & MARRAMÀ, G. & TYLER, J.C. & ZORZIN, R. (2014)
The Pesciara-Monte Postale Fossil-Lagerstätte: 2. Fishes and other vertebrates. Rendiconti della Società Paleontologica Italiana, 4: 37–63
CARNEVALE, G. & BANNIKOV, A.F. & MARRAMÀ, G. & TYLER, J.C. & ZORZIN, R. (2014)
The Pesciara-Monte Postale Fossil-Lagerstätte: 2. Fishes and other vertebrates. Rendiconti della Società Paleontologica Italiana, 4: 37–63
LI, G.-Q. (1997)
Elasmobranchs from the Lower Tertiary of the western Tarim Basin, China, and their biostratigraphic significance. Palaeoworld, 7: 107–136, 13 fig., 2 tabl.
EASTMAN, C.R. (1904)
Descriptions of Bolca fishes. Bulletin of the Museum of Comparative Zoology at Harvard College, 46 (1): 1–40
JAEKEL, O. (1894)
Die eocänen Selachier vom Monte Bolca. Ein Beitrag zur Morphogenie der Wirbeltiere. 176 p., 39 fig., 8 pl., Verlag Julius Springer, Berlin
LIOY, P. (1865)
Sopra alcuni avanzi di plagiostomi fossili del Vincentino e specialmente sull' Alopiopsis plejodon Lioy (Galeus cuvieri Ag.). Atti della Società Italiana di Scienze Naturali e del Museo Civico di Storia Naturale di Milano, 8: 398–405, pl. 4.