petalodontn.adj.

Brit.

/ˈpɛtl̩ə(ʊ)dɒnt/, U.S.

/ˈpɛdl̩əˌdɑnt/

Origin: A borrowing from Latin. Etymon: Latin Petalodont-.

Etymology: < scientific Latin Petalodont- (in Petalodontidae , family name; < ancient Greek πέταλον leaf (see petal n.) + scientific Latin -odont -odont comb. form + -idae (see -id suffix³), after Petalodus, genus name (R. Owen Odontography (1840) 61)).

Palaeontology.

A. n.

A pavement-toothed shark of the extinct family Petalodontidae or order Petalodontiformes, having petal-shaped teeth and known from Carboniferous and Permian fossils.

ΘΚΠ

the world > animals > fish > subclass Elasmobranchii > order Pleurotremata > [noun] > belonging to specific extinct families

hybodont1847

petalodont1872

pleuracanth1890

pleuracanthoid1890

1872 F. V. Hayden U.S. Geol. Surv. Nebraska 241 Teeth small or of medium size, possessing the general characteristics of the petalodonts.

1966 A. S. Romer Vertebr. Paleontol. (ed. 3) 319/1 Most abundant were the so-called pavement-toothed sharks, including the cochliodont family, perhaps ancestral to chimaeras, petalodonts, psammodonts, and others.

2002 Anchorage (Alaska) Daily News (Nexis) 12 Apr. h7 His preoccupation with extinct species, especially the toothy, monstrous variety, seems tailor-made for kids. They'll love his xenacanth, helicoprion and petalodonts.

B. adj.

Of or relating to the extinct shark family Petalodontidae or order Petalodontiformes.

ΚΠ

1890 Cent. Dict. 4424/2 Petalodont, of or relating to the Petalodontidæ.

1990 Mem. Queensland Mus. 28 71/2 This presumed petalodont tooth..might be placed in the genus Antliodus or Tanaodus.

2000 Boll. Soc. Paleontol. Ital. 39 225 An isolated tooth of a petalodont chondrichthyan..is here described.

Derivatives

petaloˈdontid n. and adj. (a) n.= A.; (b) adj. = B.

ΚΠ

1895 I. K. Funk et al. Standard Dict. Eng. Lang. II. at Petalodontidæ Petalodontid, n.

1909 Webster's New Internat. Dict. Eng. Lang. at Petalodontidæ Petalodontid a. & n.

1974 Rep. Geol. Surv. Iran 31 55 (title) Tooth fragment of a petalodontid fish..from the Permian of central Iran.

1997 G. S. Helfman et al. Diversity of Fishes xi. 172/2 Other groups, such as the squatinactids and petalodontids, were skatelike.

† petalodontoid adj. and n. Obsolete rare (a) adj.= B.; (b) n. = A.Apparently only attested in dictionaries or glossaries.

ΚΠ

1890 Cent. Dict. Petalodontoid, a. and n.

This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).

单词	petalodont
释义	petalodontn.adj. Brit. /ˈpɛtl̩ə(ʊ)dɒnt/, U.S. /ˈpɛdl̩əˌdɑnt/ Origin: A borrowing from Latin. Etymon: Latin Petalodont-. Etymology: < scientific Latin Petalodont- (in Petalodontidae , family name; < ancient Greek πέταλον leaf (see petal n.) + scientific Latin -odont -odont comb. form + -idae (see -id suffix³), after Petalodus, genus name (R. Owen Odontography (1840) 61)). Palaeontology. A. n. A pavement-toothed shark of the extinct family Petalodontidae or order Petalodontiformes, having petal-shaped teeth and known from Carboniferous and Permian fossils. ΘΚΠ the world > animals > fish > subclass Elasmobranchii > order Pleurotremata > [noun] > belonging to specific extinct families hybodont1847 petalodont1872 pleuracanth1890 pleuracanthoid1890 1872 F. V. Hayden U.S. Geol. Surv. Nebraska 241 Teeth small or of medium size, possessing the general characteristics of the petalodonts. 1966 A. S. Romer Vertebr. Paleontol. (ed. 3) 319/1 Most abundant were the so-called pavement-toothed sharks, including the cochliodont family, perhaps ancestral to chimaeras, petalodonts, psammodonts, and others. 2002 Anchorage (Alaska) Daily News (Nexis) 12 Apr. h7 His preoccupation with extinct species, especially the toothy, monstrous variety, seems tailor-made for kids. They'll love his xenacanth, helicoprion and petalodonts. B. adj. Of or relating to the extinct shark family Petalodontidae or order Petalodontiformes. ΚΠ 1890 Cent. Dict. 4424/2 Petalodont, of or relating to the Petalodontidæ. 1990 Mem. Queensland Mus. 28 71/2 This presumed petalodont tooth..might be placed in the genus Antliodus or Tanaodus. 2000 Boll. Soc. Paleontol. Ital. 39 225 An isolated tooth of a petalodont chondrichthyan..is here described. Derivatives petaloˈdontid n. and adj. (a) n.= A.; (b) adj. = B. ΚΠ 1895 I. K. Funk et al. Standard Dict. Eng. Lang. II. at Petalodontidæ Petalodontid, n. 1909 Webster's New Internat. Dict. Eng. Lang. at Petalodontidæ Petalodontid a. & n. 1974 Rep. Geol. Surv. Iran 31 55 (title) Tooth fragment of a petalodontid fish..from the Permian of central Iran. 1997 G. S. Helfman et al. Diversity of Fishes xi. 172/2 Other groups, such as the squatinactids and petalodontids, were skatelike. † petalodontoid adj. and n. Obsolete rare (a) adj.= B.; (b) n. = A.Apparently only attested in dictionaries or glossaries. ΚΠ 1890 Cent. Dict. Petalodontoid, a. and n. This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022). < n.adj.1872
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