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Showing results for tags 'sakamena'.
Found 11 results
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First of all, the list of fish found in Madagascar - there are more than 30 species! So many that I can't treat all of them (and I've never seen some of them). There is relatively old, but good literature on it - Lehman has written one of the most comprehensive publications on this subject: J.-P.Lehman (1952) Etude Complementaire des Poisson de L'Eotrias de Madagascar. Kungl. Svenska Vetenskapsakademiens Handlingar. Fjärde Serien Bd 2 No 6 (in French, 244 pages, 340MB!) Australosomus merlei Piveteau, 1934 is easy to recognize: Small
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- icarealcyon
- bobasatrania
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Taxonomy from Garassino & Teruzzi 1995. Diagnosis from Garassino & Teruzzi 1995, p. 92: "Subrectangular carapace; long rostrum, lacking both suprarostral and subrostral teeth; marked dorsal hump at the base of the rostrum; spine in the posterior third of the dorsal midline of the carapace; deep hepatic groove and weak branchiocardiac groove; gastro-orbital, hepatic and branchiocardiac spines present; pereiopods I-III chelate; strongly elongate pereiopod III; tergite VI rectangular; triangular telson with a pointed distal extremity." Line drawing from Garassino & Teruzzi 1
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From the album: Vertebrates
Pteronisculus macropterus White, 1933 Early Triassic Sakamena formation Ambilobe Madagascar Length 28cm -
From the album: Vertebrates
Icarealcyon malagasium Beltan, 1984 Early Triassic Dienerian Sakamena Formation Ambilobe Madagascar -
From the album: Vertebrates
Icarealcyon malagasium Beltan, 1984 Early Triassic Dienerian Sakamena Formation Ambilobe Madagascar Due to its enormous pectoral fins, Icarealcyon malagasium was described by Beltan as a "poisson volant" - a "flying fish" - in the family Semonotidae (not related to what is now known as "flying fish" - these are Exocoetidae in the order Beloniformes). You would expect flying fish to be fast swimmers - the rather thickset appearance of Icarealcyon more likely hints to slow swimmers with relatively high maneuverability (comparable to Albertonia from -
Icarealcyon malagasium Beltan, 1984, a "flying fish"
oilshale posted a gallery image in Members Gallery
From the album: Vertebrates
Icarealcyon malagasium Beltan, 1984 Early Triassic Dienerian Sakamena Formation Ambilobe Madagascar -
From the album: Vertebrates
Australosomus merlei Piveteau, 1934 Lower Triassic Dienerian Sakamena Formation Ambilobe Madagascar Small to medium size fish (~ 10 to 15cm / 4 to 6"), fusiform body, relatively small head with a slightly rounded snout. Its dorsal fin is located in the posterior fourth of the body. Caudal fin divided with wide lobes. Scales on the flanks are noticeably stalk-shaped. -
From the album: Vertebrates
Saurichthys madagascariensis Piveteau, 1945 Early Triassic Dienerian Sakamena Formation Anktokazo Madagascar Length 60cm Lit.: Pivetau, J. (1944-45): Paléontologie de Madagascar, XXV. Les poissons du Trias inférieur. La famille des Saurichthyidés. Ann. Paléont., 31: 79-87; Paris Rieppel, O. (1980): Additional specimens of Saurichthys madagascariensis from the Eotrias of Madagascar. N.Jb. Geol. Paläont. Mh., 1980 (1): 43-51; Stuttgart Kogan, I. und Romano, C. (2016): Redescription of Saurichthys madagascariensis Piveteau, 1945 (Actinopterygii, Ear -
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
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Taxonomy from Fossilworks.org. Description from Frickhinger 1995, p. 417: "Small fish (up to 15cm / 6") with a rounded body, somewhat thickset appearance. Broad but short head. Dorsal fin attached to the posterior half of the body. Pectoral and anal fin small. Anal fin almost opposite to dorsal fin. Caudal fin moderately divided. Eyes remarkably large." Reconstruction of the head region: References: Priem, F. (1924): Paléontologie de Madagascar, XII. Les poissons fossiles. Ann. Paléont., 13: 107-132; Paris. Piveteau, J. (1934): Paléontologie de Madagascar, XXI
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Taxonomy from Fossilworks.org. Description by oilshale: Small fish (up to 15cm / 6") with a rounded body, somewhat thickset appearance. Dorsal fin attached to the posterior half of the body. Pectoral and anal fin relatively large. Anal fin starts behind end of dorsal fin. Caudal fin moderately divided. Eyes remarkably large. Reconstruction of the head region: References: Piveteau, J. (1940): Paléontologie de Madagascar XXIV Nouvelles recherches sur les poisson du Trias inférieur. Ann. Paleont., 28: 69-88