Archaeomaene tenuis (Woodward 1895)

By oilshale

• July 21, 2022

Taxonomy

Kingdom: Animalia
Phylum: Chordata Haeckel 1874
Class: Actinopteri Cope 1871
Order: Pholidophoriformes
Family: Archaeomaenidae Boulenger 1904a
Genus: Archaeomaene
Species: Archaeomaene tenuis
Author Citation (Woodward 1895)

Geological Time Scale

Eon: Phanerozoic
Era: Mesozoic
Period: Jurassic
Sub Period: None
Epoch: Late
International Age: Oxfordian / Tithonian

Stratigraphy

Purlawaugh Formation
Talbragar Bed

Provenance

Acquired by: Purchase/Trade

Dimensions

Length: 7 cm

Location

Talbragar
Gulgong Town
New South Wales
Australia

• archaeomaene
• australia
• jurassic
• oxfordian
• talbragar
• tff-oilshale-ch2681
• tithonian

Comments

Taxonomy from Lynne Bean 2021.
Archaeomaene tenuis can be easily distinguished from the much more common Cavenderichthys talbragarensis by the more posterior dorsal fin.
Diagnosis for Archaeomaene tenuis from Bean 2021 (modified from Woodward 1895): “ Same as family with the following additional characteristics. The supraorbital sensory canal has branched (ramified) tubules [*]. The dorsal fin is placed opposite to the anal fin. Pelvic, dorsal and anal fins are without fringing fulcra [*]. There are six uroneurals; the epaxial margin of the caudal fin has a few long basal fulcra and long fringing fulcra extending along the whole margin; both leading margins of the caudal fin have a single principal ray. Scales are elasmoid cycloidal [*]. (An asterisk [*] notes a uniquely derived character or autapomorphy of the genus).”

Line drawing from Bean 2021, p. 116:

References:
Woodward, A.S., 1895. The fossil fishes of the Talbragar Beds (Jurassic?). Geological Survey of New South Wales, Palaeontology. Memoir 9: 1‒27.
Bean, Lynne (2021) Revision of the Mesozoic freshwater fish clade Archaeomaenidae, Alcheringa: An Australasian Journal of Palaeontology, 45:2, 217-259, DOI: 10.1080/03115518.2021.1937700
Bean, Lynne (2021) The morphological revisions of freshwater fish from Late Jurassic - Early Cretaceous sites in Australia and other Gondwanan continents leads to new phylogenetic hypotheses of relationships among stem teleosts. Thesis (PhD) DOI: 10.25911/5JM5-WY12