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Found 3 results

  1. Squidpastry

    Platysomus sp. ?

    Hello! A fossil of what I believe to be Platysomus has come into my possession and I was wondering if any others here have the necessary knowledge to identify the exact species (or if it's even identifiable at all)! If my photos aren't sharp enough, I can take more and hopefully I'll be allowed to edit my post.... post-posting! I've attached images of both halves and shots of the head- If I remember correctly, those are important for ID! ...Unfortunately, location and age are unknown. If I find out where this one's from I'll leave a comment or update my post- whichever one's more possible than the other. The fish itself is exactly 7cm long- body depth is 5.2cm. Thank you in advance! I appreciate all the help that I recieve here. (.....Especially that "egg" that I posted before- turned out be very un-egglike in hindsight! Thank you again!)
  2. oilshale

    Pteronisculus cicatrosus WHITE, 1933

    Taxonomy from Lehman 1952. Genus Diagnosis from White 1933, p. 118: "Palæoniscidæ with fusiform bodies, long heads, and large orbits anteriorly placed. Gape wide and suspensorium very oblique. Frontals long with extreme irregular media] and digitate parietal sutures; parietals well developed with short triradiate sensory grooves and produced forwards into conspicuous median “ processes.” Preoperculum bent almost at fight-angles, with upper horizontal limb long and roughly triangular, but truncated by supratemporal margin: long wedge shaped bone “ Y ” in excavated antero—superior margin of operculum. Supratemporal large with anterior arm dividing strap-like intertemporal from frontal; four or five postorbital bones present. Teeth on outer margins of maxilla and dentary numerous, minute and sharply pointed. Fin—raye fine and very numerous, articulated dîstally in pectorals, but throughout in other fins; all distanty dichotomized; fulcra minute. Pectoral fins large, their length exceeding distance between their origin and that of ventralfins, which is somewhat nearer pectoral than anal fins; ventral and unpaired fins well developed, the triangular dorsal being posteriorly placed and somewhat anterior in position to similarly—shaped anal. Posterior half of caudal fin unknown. Scales small and numerous, deeplÿ overlapping, rhomboid in shape, their exposed surfaces covered with ganoine, obliquely ridged, and denticulated posteriorly." Species Diagnosis from White 1933, p. 120: "A Pteronisculus with fusiform body; maximum depth about equal to length of head with opercular apparatus, and rather less than one—third of total length to base of caudal fin. Length of pectoral fin somewhat less than distance between tip of snout and hinder margin of maxilla. Origin of dorsal fin above thirty—fourth scale—row from pectoral girdle approximately. Scales in about fifty—five vertical rows to base of caudal fin, and ornamented with oblique rugæ and a few finer rugæ running parallel to lower margin of scale on main flank—scales." Line drawing of the head from White 1933, p. 119: Line drawing from Lehman 1952, p. 69. References: White E. I. (1933) New Triassic Palaeoniscids from Madagascar. The Annals and Magazine of Natural History, Tenth Series 10:118-128. Lehman. J.-P. (1952) Etude complémentaire des poissons de l'Eotrias de Madagascar. Kungliga Svenska Vetenskapsakademiens Handlingar 2:1-201. References: White, E. I. (1933): New Triassic palaeoniscids from Madagascar. Ann. a. Mag. Nat. Hist.(10) 11: 118-128; London.
  3. ChinaBoy

    Ptcholepis

    From the album: FISH OF MINE

    Class:Actinopterygii Order:Paleonisciformes Family:Ptcholepis location: Jianchang, Liaoning province,China Yixian Formation Age: Late Jurassic Length: 210mm
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