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Taxonomy from Romano et al., 2019. In his 1933 paper, White described two new Pteroniscoids from Madagascar: Pteronisculus cicatrosus , which is rather common, and the somewhat rarer Pteronisculus macropterus. Diagnosis from White 1933, p. 126: "Pteronisculus with 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 rugæ only." Sketch from White 1933, p. 126: References: White, E. I. (1933): New Triassic palaeoniscids from Madagascar. Ann. a. Mag. Nat. Hist.(10) 11: 118-128; London C. Romano, A. López-Arbarello, D. Ware, J. F. Jenks, and W. Brinkmann (2019). Marine Early Triassic Actinopterygii from the Candelaria Hills (Esmeralda County, Nevada, USA). Journal of Paleontology 93:971-1000

In his 1933 paper, White described two new Pteroniscoids from Madagascar: Pteronisculus cicatrosus , which is rather common and the somewhat rarer Pteronisculus macropterus. Diagnosis from White 1933, p. 126: "Pteronisculus with 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 rugæ only." Sketch from White 1933, p. 126: References: White, E. I. (1933): New Triassic palaeoniscids from Madagascar. Ann. a. Mag. Nat. Hist.(10) 11: 118-128; London

Taxonomy from Fossilworks.org. Due to its enormous pectoral fins, Icarealcyon malagasium was described by Beltan as a "poisson volant" - a "flying fish" - in the family Semionotidae (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). Icarealcyon was described by Beltan on the basis of poor material - in all three specimens only the body without head was preserved. Icarealcyon is probably closely related to Albertonia, or possibly even a synonym. Line drawing from Beltan 1984, p. 78: References: L. Beltan. 1984. A propos d'un poisson volant biplan d l'Eotrias du NW de Madagascar: Icarealcyon malagasium Beltan. Annales de la Société Géologique du Nord 103:75-82

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

Taxonomy from Fossilworks.org. Perleidus madagascariensis was recently redescribed by Tintori et al as Teffichthys madagascariensis. Origin of the name: Named after ‘TEFF’ (Triassic Early Fish Fauna; see Tintori et al. 2014), being one of the most common representatives of this assemblage, and from Greek ‘ichthys’, meaning ‘fish‘. Diagnosis from Marramà et al. 2017, p. 223: "Small- to medium-sized basal (non neopterygian) actinopterygian fish having the following unique combination of characters: body elongate and tapered; dermal cranial bones ornamented with tubercles and ridges; parietals subquadrangular in shape with three pit-lines (anterior, median and posterior); posttemporals widely separated; suborbital and spiracular ossicles present; two to five supraorbitals; nasals separated by the rostral; maxilla fixed to an almost vertical preopercle; straight oral margin of maxilla, which is dorso-posteriorly expanded; jaws with styliform teeth; broad vertical or slightly forward inclined preopercle; opercle smaller than subopercle; five to eight branchiostegal rays; dorsal and anal fins inserted in the posterior half of the body; median-fin rays only distally segmented and supported by an equal number of pterygiophores at least in the middle part; fringing fulcra present on all fins; abbreviated heterocercal caudal fin; anteriormost lateral trunk scales higher than wide, with serrated posterior margin." Reconstruction from Marramá et al., 2017, p. 228: References: Piveteau, J. (1934): Paléontologie de Madagascar, XXI. Les poissons du Trias inferieur. Contribution à l’étude des Actinoptérygiens. Ann Paléont., 23: 81-180; Paris Marramà G., Lombardo C., Tintori A. & Carnevale G. (2017) - Redescription of  ‘Perleidus’ (Osteichthyes, Actinopterygii) from the Early Triassic of northwestern Madagascar . Riv. It. Paleontol. Strat., 123(2): 219-242.

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. References: Priem, F. (1924) Paléontologie de Madagascar, XII. Les poissons fossiles. Ann. Paléont., 13: 107-132; Paris