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Saurichthys Triassic China
svcgoat posted a topic in Is It Real? How to Recognize Fossil Fabrications
Thinking about purchasing this specimen Saurichthys, Triassic China, but want to make sure it checks out.- 11 replies
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From the album: Vertebrates
Saurichthys spinosa Su, Wu & Fang, 2017 Middle Triassic Anisian Guangling Formation Dawazi Yunnan PRC-
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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 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. Ecrinesomus dixoni Woodward, 1910 Medium sized fish with a rounded, laterally flattened body. Snout flattened. Dorsal and anal fins opposite and broad based. Attached behind the body's midpoint. Rhombic body. Caudal fin large, deeply divided. Often mixed up with the somehow similar looking Bobasatrania mahavavica. Unfortunately the head is not completely preserved. Bobasatrania mahavavica White, 1932 There's quite a confusion between Ecrinesomus and Bobasatrania. Even in publications the same reconstruction (the same drawing!) is sometimes labeled as Bobasatrania and sometimes as Ecrinesomus. In the first publication about Ecrinesomus, one Bobasatrania was mistakenly mixed in between. Bobasatrania has a crooked diamond-shaped body – while Ecrinesomus's anal and dorsal fins start directly opposite. Boreosomus gillioti Priem, 1924 Small to medium sized fish (10 to 20 cm / 4 to 8"). Slender body, dorsal fin small, located before the body's midpoint. Caudal fin divided. Strong, rectangular scales. Parasemionotus labordei Priem, 1924 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 fins small. Caudal fin moderately divided. Eyes remarkably large. Teffichthys madagascariensis Piveteau, 1934 (=Perleidus madagascariensis) Medium sized fish with a somewhat thickset appearance. Bulky head. Its dorsal fin is located in the posterior third of the body. Pteronisculus cicatrosus White, 1934 Small to medium fish with fusiform body (less than 15cm / 6" ?). Small dorsal fin, located slightly behind the midpoint of the body, diagonally opposite the anal fin. Big eyes. Relatively long and broad pectoral fins. Comparatively small scales. Pteronisculus macropterus White, 1933 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." Paracentrophorus madagascariensis Piveteau, 1940 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 well behind end of dorsal fin. Caudal fin moderately divided. Eyes remarkably large. Icarealcyon malagasium Beltan, 1984 Icarealcyon can be easily mixed up with Parasemionotus; characteristic are the huge pectoral fins. 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 British Columbia). Fig. C is Icarealcyon - the reconstruction is not quite correct. Saurichthys madagascariensis Piveteau, 1945 Medium sized fish with elongated, streamlined jaws. Head elongated. Dorsal fin almost at the end of the body, opposite the anal fin. Small scales. Whiteia woodwardi Moy-Thomas, 1935 Massive body. Pectoral fin attached slightly before the first dorsal fin. Piveteauia madagascariensis Lehman 1952 More slender body. Pectoral fin attached well before first dorsal fin lobe. Ventral fin opposite to first dorsal fin lobe. Have fun Thomas PS: If you are interested in Lehman's paper send me a PM with your email address (remember - 340MB!)
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Is there anything odd about this Saurichthys?
quam_fossilium posted a topic in Is It Real? How to Recognize Fossil Fabrications
Is this correctly identified as a Saurichthys? Does it at all seem augmented/modified? Anyone have an idea of the typical value of a fossil like this (without using the sold price as a reference)?- 3 replies
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Here is a skull of Saurichthys from Yunnan, China with its mouth wide open, you can see there is a small fish at its mouth, look like the Saurichthys was eating the small fish. The small fish, half embedded in matrix, looks like a coelacanth by its tail, any idea if it is a coelacanth or a Gymnoichthys inopinatus?
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From the album: Vertebrates
Saurichthys dawaziensis Wu et al., 2009 Middle Triassic Dawazi Yunnan PRC together with other unidentified fish -
From the album: Vertebrates
Sinosaurichthys minuta WU et al, 2011 Middle Triassic Jialingjiang Formation Luoping Yunnan China- 6 comments
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From the album: Vertebrates
Saurichthys madagascariensis Piveteau, 1945 Early Trassic Dienerian Ambilobe Madagascar Length 40cm / 16" -
A 10 year old boy discovered a new species of fossil fish in some flagstones of a 17th century monastery. Candelarhynchus padillai. Enjoy. LINK1 LINK2
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Originally named Sinosaurichthys by Wu et al., 2011, the genus was reranked as Saurichthys by A. Tintori (2013) Diagnosis from Wu et al. 2011, p. 595: "Medium−sized Sinosaurichthys (standard body length ranging from 270–470 mm) with unusually elongated median fins with relatively few segments of fin rays; less number of neural arches between opercle and caudal fin (approximately 157–172), less number of anterior ones with neural spines (130–146); and less number of mid−dorsal scales in front of dorsal fin (69–86) than in type species; 14–15 distinct haemal spines in caudal region; pectoral fin triangular shaped with length about 1/3 of mandible length (shared with S. minuta described below); posttemporal−supracleithrum from either side separated from each other by anterior mid−dorsal scales (shared with S. minuta described below); cleithrum plate (depth/length ratio ca. 1.2–1.25) much lower than in type species (approximately 1.8), but close to that in S. minuta (ap− proximately 1). Fin formula: P 18–19, V 18–20, D/A 44–49/ >40–48, C 37–39/37–39." Identified by oilshale using Wu et al. 2011. References: Wu, F.X., Sun, Y.L., Xu, G.H., Hao, W.C., Jiang, D.Y., and Sun, Z.Y. (2011) New saurichthyid actinopterygian fishes from the Anisian (Middle Triassic) of southwestern China. Acta Palaeontologica Polonica 56 (3): 581–614. Tintori, A. (2013) A new species of Saurichthys (Actinopterygii) from the Middle Triassic (Early Ladinian) 0f the Northern Grigna Mountain (Lombardy, Italy). Rivista Italiana di Paleontologia e Stratigrafia 119 (3):287. DOI: 10.13130/2039-4942/6041.
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Monte San Giorgio is now an UNESCO WHL site. References: de Alessandri G. (1910) Studii sui pesci Triasici della Lombardia, Memorie della Societa Italiana di Scienze Naturali e del Museo Civico di Storia Naturale di Milano 7 1, 1-145. Rieppel O. (1985) Die Gattung Saurichthys (Pisces, Actinopterygii) aus der mittleren Trias des Monte San Giorgio, Kanton Tessin, Schweizerische Paläontologische Abhandlungen 108, 1-103. Bürgin T., Eichenberger U., et al (1991) Die Prosanto Formation - eine fischreiche Fossil-Lagerstätte in der Mitteltrias der Silvretta-Decke (Kanton Graubünden, Schweiz), Eclogae Geologicae Helvetiae 84, 921-990. Renesto S., Stockar R. (2009) Exceptional preservation of embryos in the actinopterygian Saurichthys from the Middle Triassic of Monte San Giorgio, Switzerland, Swiss Journal of Geosciences 102, 323-330 Beardmore, S.R., Furrer, H. (2015) Taphonomic analysis of Saurichthys from two stratigraphic horizons in the Middle Triassic of Monte San Giorgio, Switzerland. Swiss J Geosci 109, 1–16 (2016). https://doi.org/10.1007/s00015-015-0194-z.
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Taxonomy from Kogan & Romano 2016. Diagnosis from Kogan & Romano 2016, p. (e1151886-5): "Medium-sized saurichththyid (sensu Tintori, 2013) of at least 60 cm total length (MNHN.F MAE 2524, FG 1/2013, PIMUZ A/I 4144); extensive scale cover with high mid-lateral scales, broad mid-dorsal and mid-ventral scales, and numerous smaller rhombic scales present in dorsolateral and ventrolateral positions; one ventrolateral row of specialized, enlarged scales that are shaped like a tilted ‘L’; all fins with fringing fulcra of Pattern C (sensu Arratia, 2009), and with segmented, distally branched lepidotrichia; operculum long and subtriangular; antoperculum present; one pair of branchiostegal rays; suborbital bone developed; circumorbital series including a well-developed supraorbital, a dermosphenotic, and at least one posterior infraorbital bone; surangular very narrow and anteriorly reaching the level of the center of the orbit; elongate postorbital portion of the cranium, skull (including operculum) measuring about 27% of the total body length." References: Pivetau, J. (1944-45): Paléontologie de Madagascar, XXV. Les poissons du Trias inférieur. La famille des Saurichthyidés. Ann. Paléont., 31: 79-87. Rieppel, O. (1980): Additional specimens of Saurichthys madagascariensis from the Eotrias of Madagascar. N.Jb. Geol. Paläont. Mh., 1980 (1): 43-51. Beltan, L. (1996): Overview of systematics, paleobiology and paleoecology of Triassic fishes of northwestern Madagascar. In: Mesozoic Fishes - Systematics and Paleoecology, 1996, pp. 479-500. ISBN3-923871-90-2. Kogan, I. und Romano, C. (2016): Redescription of Saurichthys madagascariensis Piveteau, 1945 (Actinopterygii, Early Triassic), with implications for the early saurichthyid morphotype. Journal of Vertebrate Paleontology. Vol. 36, Iss. 4, 2016 DOI: 10.1080/02724634.2016.1151886
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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, Early Triassic), with implications for the early saurichthyid morphotype. Journal of Vertebrate Paleontology. Vol. 36, Iss. 4, 2016 DOI: 10.1080/02724634.2016.1151886