HETERODONTIFORMES (Bullhead Sharks) · 1 The ETYFish Project © Christopher Scharpf and Kenneth J. Lazara COMMENTS: v. 2.0 - 14 June 2019 Subclass ELASMOBRANCHII elasmos, plate; branchos, gill, referring to platelike interbranchial septa (i.e., tissue layer separating two halves of gill) Infraclass EUSELACHII eu-, true, good or original; selachos, a cartilaginous fish, including all elasmobranchs that have an anal fin (secondarily lost in many living forms) and two dorsal fins each with an anterior, cylindroconical spine of enameloid and dentine supported by the fin skeleton (spines lost in most living neoselachians; the first dorsal fin is absent in a few living sharks, and one or both dorsals are absent in many rays) Division NEOSELACHII neo-, new or modern; selachos, a cartilaginous fish, including all living sharks and rays and certain Mesozoic sharks, including palaeo- spinacids (Palaeospinax and Synechodus) and possibly orthacodonts and anacoracids Subivision SELACHII selachos, a cartilaginous fish, comprising the sharks Order HETERODONTIFORMES Family HETERODONTIDAE Bullhead Sharks 1 genus · 9 species Heterodontus Blainville 1816 heteros, different; odonto-, tooth, referring to pointy teeth (for clutching prey) at front of jaws and rounded molar-like teeth (for grinding hard-shelled invertebrates) at the back Heterodontus francisci (Girard 1855) of Francisco, probably referring to San Francisco (city and/or bay), California, USA (although type was collected from Monterey Bay and species may not occur so far north) Heterodontus galeatus (Günther 1870) helmeted, probably referring to high, enlarged supraorbital ridges or crest Heterodontus japonicus Maclay & Macleay 1884 Japanese, described from a collection of fishes from the seas of Japan Heterodontus mexicanus Taylor & Castro-Aguirre 1972 Mexican, referring to distribution in Gulf of California along the Mexican coast to at least Oaxaca and perhaps to Peru Heterodontus omanensis Baldwin 2005 -ensis, suffix denoting place: Gulf of Masira, Central Oman, Arabian Sea, type locality Heterodontus portusjacksoni (Meyer 1793) of Port Jackson, Sydney, New South Wales, near Botany Bay, were type was collected Heterodontus quoyi (Fréminville 1840) in honor of surgeon-naturalist Jean René Constant Quoy (1790-1869), for his friendship, untiring zeal and wide knowledge of zoology Heterodontus omanensis. From: Baldwin, Z. H. 2005. A new species of bullhead shark, genus Heterodontus (Heterodontiformes: Heterodontidae), from Oman. Copeia 2005 (2): 262-264. 2 · HETERODONTIFORMES (Bullhead Sharks) · The ETYFish Project Heterodontus ramalheira (Smith 1949) in honor of João Ramalheira, captain of the trawler that collected type, and “who has brought in much valuable scien- tific material” [presumably a noun in apposition, without the patronymic i“ ”] Heterodontus zebra (Gray 1831) referring to 12 narrow brown or black zebra-like stripes on body.