Edited by oilshale
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By oilshale (edited)
Kingdom: Animalia
Phylum: Chordata
Class: Actinopteri Cope 1871
Order: Kyphosichthyiformes Sun and Ni 201
Family: Kyphosichthyidae Sun and Ni 2017
Genus: Luoxiongichthys
Species: Luoxiongichthys hyperdorsalis
Author Citation Wen et al., 2011
Eon: Phanerozoic
Era: Mesozoic
Period: Triassic
Sub Period: None
Epoch: Middle
International Age: Anisian, Pelsonian
Guanling Formation
Member II
Acquired by: Purchase/Trade
Length: 15 cm
Daaozi, Luoxiong
Luoping County
Yunnan
China
Taxonomy from Fossilworks.org.
Diagnosis from Wen et al. 2012. p. 152: "Middle−sized fishes, laterally compressed. The outline is triangular, with the apex of the triangle formed by a pointed “hump” in the dorsal region. Opercular series com− prising opercle, subopercle, interopercle, and preopercle; subopercular has long ramus anterior to opercular; suboper− cular a little less than half the size of the opercular; preopercular almost vertically oriented, with slender dorsal limb; three square−like suborbitals; at least eight branchiostegal rays with tubercles on the surface and comb−like ornament on their anterior margin; strong lower jaw has coronoid pro− cess; pointed grasping teeth in upper jaw, lower jaw, para− sphenoid and entopterygoid; articulation of jaw immediately below posterior margin of orbit; cleithrum is strong, with ridge ornament on surface of upper part; supracleithrum is large, nearly half the depth of the cleithrum, the lower end is somewhat pointed; two postcleithra lie behind the cleithrum; clavicle present; hemiheterocercal tail slightly forked; each radial supports one lepidotrichium in unpaired fins; all rays segmented from middle part and bifurcated distally; fringing fulcra on anterior margin of all fins; enlarged fulcra before anal fin and caudal fin; the whole body is covered with ganoid scales with tuberculate ornament; scales contact each other by peg−and−socket structure."
Line drawing by Wen et al., p. 152:
Identified by oilshale using Wen et al. 2002.
References:
Sun, Z. Y. and Ni, P. G. (2017) Revision of Kyphosichthys grandei Xu & Wu, 2012 from the Middle Triassic of Yunnan Province, South China: implications for phylogenetic interrelationships of ginglymodian fishes. Journal of Systematic Palaeontology 16:67-85.
Edited by oilshale
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