Habroichthys is an extinct genus of peltopleuriform ray-finned fish from the Middle Triassic, and is the only genus of the monotypic family Habroichthyidae. Fossils of the fish have been found in a number of countries being Slovenia, Italy, and China. Species within the genus were small with the largest species having a standard length of only . Due to their small size, the preservation of the skull bones of the fish are usually poorly preserved, resulting in species being identified by the number of flank scales along with the placement of certain fins on the body. Within their environment, H
Habroichthys is an extinct genus of peltopleuriform ray-finned fish from the Middle Triassic, and is the only genus of the monotypic family Habroichthyidae. Fossils of the fish have been found in a number of countries being Slovenia, Italy, and China. Species within the genus were small with the largest species having a standard length of only . Due to their small size, the preservation of the skull bones of the fish are usually poorly preserved, resulting in species being identified by the number of flank scales along with the placement of certain fins on the body. Within their environment, Habroichthys would have been a very common fish and would have contributed a large amount of biomass in their ecosystems. Overall, these fish would have most likely behaved like a number of modern schooling fish that swim near the water's surface. There are currently 12 valid species attributed to the genus.
== History == The type species of Habroichthys, H. minimus, was first descripted in 1939 by Brough based on an incomplete specimen (BMNH P. 19359) that lacked a number of skull elements along with the paired fins of the fish. The species would later be redescribed by Bürgin (1992) based on material that has been attributed to the Besano Formation and the Meride Limestone. Along with this, he would also describe a second species of the genus, H. griffithi, along with some specimens of indeterminate species. Between the description of the second species and 2010, a number of specimens had been found at various sites in Italy and Slovenia. The third species, H. broughti, would be described by Lin et al. (2011) based on material excavated from the Guanling Formation and mark the first specimen found in what would have been the Eastern Tethys Ocean. In 2016, Tintori et al. would reassigned a species of Peltopleurus , P. orientalis, to Habroichthys along with the description of another new species, H. dolomiticus, from the Dont Formartion. The most recent paper focusing on Habroichthys was published in 2025 by Conedera et al. in which seven new species were described along with a general overview of the paleoecology, paleoenvironment, and palaeobiogeography for the genus.
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