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  • Pteronisculus macropterus White, 1933

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    oilshale

    By oilshale

      • In his 1933 paper, White described two new Pteroniscoids from Madagascar: Pteronisculus cicatrosus , which is rather common and the somewhat rarer Pteronisculus macropterus. According to White, P. macropterus is characterized by an "elongate-fusiform body; maximum depth rather less than length of head with opercular apparatus, and equal to one-quarter total length to base of caudal fin. length of pectoral fin exceeding distance between tip of snout and hinder margin of maxilla. Origin of dorsal fin above fortieth scale-row from pectoral girdle approximately. Scales in more than seventy vertical rows to base of caudal fin, and ornamented with oblique rugae only."

      Lit.:

      White, E. I. (1933): New Triassic palaeoniscids from Madagascar. Ann. a. Mag. Nat. Hist.(10) 11: 118-128; London

    Taxonomy

    Kingdom: Animalia
    Phylum: Chordata
    Class: Actinopterygii
    Order: Palaeonisciformes
    Family: Palaeoniscidae
    Genus: Pteronisculus
    Species: P. macropterus
    Author Citation White, 1933

    Geological Time Scale

    Eon: Phanerozoic
    Era: Mesozoic
    Period: Triassic
    Epoch: Early
    International Age: Dienerian

    Stratigraphy

    Beaufort Group
    Sakamena Formation

    Biostratigraphy

    Lystrosaurus and Cynognathus Zone
    Fish and Ammonite Horizon

    Provenance

    Acquired by: Purchase/Trade

    Dimensions

    Blank: 8cm

    Location

    Ambodipo
    Antsiranana Province
    Diana Region
    Madagascar

    Comments

    In his 1933 paper, White described two new Pteroniscoids from Madagascar: Pteronisculus cicatrosus , which is rather common and the somewhat rarer Pteronisculus macropterus. According to White, P. macropterus is characterized by an "elongate-fusiform body; maximum depth rather less than length of head with opercular apparatus, and equal to one-quarter total length to base of caudal fin. length of pectoral fin exceeding distance between tip of snout and hinder margin of maxilla. Origin of dorsal fin above fortieth scale-row from pectoral girdle approximately. Scales in more than seventy vertical rows to base of caudal fin, and ornamented with oblique rugae only."

    Lit.:

    White, E. I. (1933): New Triassic palaeoniscids from Madagascar. Ann. a. Mag. Nat. Hist.(10) 11: 118-128; London

    Go to fossils Fishes

    User Feedback


    oilshale

    oilshale 947

    Posted · Report

    Hi Ron,

    the tail is missing and the fish is seen in partial ventral view - so belly up. These huge fins are the pectoral fins - they can almost touch the anal fin.

    In P. cicatrosus, the pectoral fins are much smaller.

    Thomas

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