Platysiagum sinensis Wen et al., 2019

Taxonomy

Kingdom: Animalia
Phylum: Chordata Haeckel, 1874
Class: Actinopteri Cope, 1871
Order: Peltopleuriformes Lehmann, 1966
Family: Platysiagidae Brough, 1939
Genus: Platysiagum
Species: Platysiagum sinensis
Author Citation Wen et al., 2019

Geological Time Scale

Eon: Phanerozoic
Era: Mesozoic
Period: Triassic
Sub Period: None
Epoch: Middle
International Age: Anisian (Pelsonian)

Stratigraphy

Guanling Formation

Biostratigraphy

Nicoraella kockeli Zone

Provenance

Acquired by: Purchase/Trade

Dimensions

Length: 8.5 cm

Location

Dawazi Village
Luoping County
Yunnan Province
China

• china
• guanling formation
• luoping biota
• platysiagum
• tff-oilshale-ch2887
• triassic
• yunnan

Comments

Taxonomy from Fossilworks.org.

From Wen et. al. 2019, p. 4: "Emended diagnosis (Bürgin, 1992, 1996; Neuman & Mutter, 2005). – Small to large-sized (52–600 mm in total length) actinopterygians. Elongate fusiform body with a deeply forked, equilobate and hemi-heterocercal caudal fin. Dorsal and anal fins segmented entirely. Head characterized by a large and broad preoperculum and a maxilla with a long and narrow posterior plate. Dermohyal present. The terminal axial scale lobe reaches over half of the upper caudal fin lobe length. No epaxial rays. Fin rays branch distally. Fringing fulcra on the surfaces of marginal fin rays. Scales with smooth surfaces and serrated posterior border."

Line drawing from Wen et al. 2019, p. 9:

 

References:
Bürgin, T. (1992). Basal ray-finned fishes (Osteichthyes; Actinopterygii) from the Middle Triassic of Monte San Giorgio (Canton Tessin, Switzerland). Schweizerische Paläontologische Abhandlungen 114, 1–164.
Bürgin, T. (1996). Diversity in the feeding apparatus of perleidid fishes (Actinopterygii) from the Middle Triassic of Monte San Giorgio (Switzerland). In Mesozoic Fishes – Systematics and Paleoecology (eds G. Arratia & G. Viohl), pp. 555–65. Munich: Pfeil.
Mutter, R. J. (2005). Re-assessment of the genus Helmolepis Stensiö 1932 (Actinopterygii: Platysiagidae) and the evolution of platysiagids in the Early-Middle Triassic. Eclogae Geologicae Helvetiae 98, 271–80.
WEN W, HU SX, ZHANG QY, et al. (2019). A new species of Platysiagum from the Luoping Biota (Anisian, Middle Triassic, Yunnan, South China) reveals the relationship between Platysiagidae and Neopterygii. Geological Magazine. 156(4):669-682.