Legnonotus krambergeri Bartram, 1977

By oilshale

• November 15, 2020

Taxonomy

Kingdom: Animalia
Phylum: Chordata
Class: Actinopteri Cope 1871
Order: Semionotiformes Arambourg & Bertin 1958
Family: Macrosemiidae Thiollière 1858
Genus: Legnonotus
Species: Legnonotus krambergeri
Author Citation Bartram, 1977

Geological Time Scale

Eon: Phanerozoic
Era: Mesozoic
Period: Triassic
Sub Period: None
Epoch: Late
International Age: Norian

Stratigraphy

Argilliti di Riva di Solto Formation

Provenance

Acquired by: Purchase/Trade

Location

Ponte Giurino
Province of Bergamo
Lombardy region
Italy

• bergamo
• italy
• legnonotus
• norian
• ponte giurino
• riva di solto formation
• tff-oilshale-ch2440
• triassic

Comments

Taxonomy from Fossilworks.org.
Genus Diagnosis by Bartram 1977, p.163: " Small macrosemiid fishes, the trunk tapering gradually to form a broad caudal peduncle; skull roof bearing genuine; gape small, the quadrate articulation lying beneath the anterior part of the orbit; dentigerous expansion of maxilla with upper and lower borders straight and diverging posteriorly, hind border also straight and perpendicular to oral border, bearing about 13 small, closely—set teeth; mandible with dentary bearing about 12 closely-set teeth, coronoid teeth rounded; leading edge of preopercular forming sharp angle; abdomina] vertebrae forming thin cylinders, notochord unconstricted; pectoral fin with about 15 rays, leading ray reduced to unpaired splint, no fringing fulcra; pelvic fin formed by five rays preceded by basa] and fringing fulcra; anal fin with seven rays, base compact; caudal fin weakly forked, axial lobe bearing five rays; dorsal fin single and long, preceded by basal and fringing fulcra, outline high anteriorly, convex posteriorly;  region immediately on either side of dorsal fin devoid of scales; scales rhomboid."

Species Diagnosis by Bartram 1977, p.164:  "Legnonotus with about 25 dorsal fin-rays; dentary teeth tall and sharp."

Line drawing from Bartram 1977, p. 164:

Identified by oilshale using  Bartram 1977.

References:

Bartram, A.W.H. (1977) The Macrosemiidae, a Mesozoic family of Holostean fishes. Bulletin of the British Museum of Natural History (Geology), 29, 137-234.

Tintori, A. and Renesto, S. (1983) The Macrosemiidae (Pisces, Actinopterygii) from the Upper Triassic of Lombardy (N. Italy). Rivista Italiana di Paleontologia e Stratigrafia 89(2):209-222.