somasteroidadj.n.

/səʊˈmastərɔɪd/

Forms: Also Somasteroid.

Etymology: < modern Latin Somasteroidea (W. K. Spencer 1951, in Phil. Trans. Royal Soc. B. CCXXXV. 87), < Greek σῶμα body + modern Latin Asteroidea , name of a subclass or class of echinoderms, < Greek ἀστεροειδής (see asteroid adj. and n.) + Latin -ea , neuter plural of -eus -eous suffix.

Zoology.

A. adj.

Belonging or pertaining to the sub-class or class Somasteroidea, which belongs in the subphylum Asteroidea of star-shaped echinoderms and comprises extinct forms having broad, petal-like arms with a pinnate structure.

ΘΚΠ

the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Echinodermata > [adjective] > of, belonging to, or characteristic of Asteroidea > belonging or relating to subclass Somasteroidea

somasteroid1955

1955 L. H. Hyman Invertebrates IV. xv. 700 The arrangement recently adopted by palaeontologists.., according to which asteroids and ophiuroids derive from a common somasteroid..ancestor.., must be somehow wrong.

1964 Oceanogr. & Marine Biol. 2 394 Spencer..describes the transition from the early somasteroid stock to the phanerozone asteroids.

B. n.

A somasteroid echinoderm.

ΘΚΠ

the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Echinodermata > [noun] > subphylum Eleutherozoa > class Asteroidea > subclass Somasteroidea > member of

somasteroid1962

1962 D. Nichols Echinoderms iii. 40 The fossilized remains of these ossicles have even been found in the earliest asteroids, the Somasteroids.

1963 Philos. Trans. (Royal Soc.) B. 246 383 The Asterozoa, or star-shaped echinoderms, may be regarded as a natural taxon, comprising the somasteroids, asteroids and ophiuroids.

1979 W. D. Russell-Hunter Life Invertebr. xxxiv. 607 The smallest class, Somasteroidea, which arose in the Ordovician, was never an extensively diversified group, being relegated by many neontologists to the status of a subclass of the Asteroidea. (The living genus, Platasterias, is no longer regarded as a somasteroid.)

This entry has not yet been fully updated (first published 1986; most recently modified version published online December 2020).

单词	somasteroid
释义	somasteroidadj.n. /səʊˈmastərɔɪd/ Forms: Also Somasteroid. Etymology: < modern Latin Somasteroidea (W. K. Spencer 1951, in Phil. Trans. Royal Soc. B. CCXXXV. 87), < Greek σῶμα body + modern Latin Asteroidea , name of a subclass or class of echinoderms, < Greek ἀστεροειδής (see asteroid adj. and n.) + Latin -ea , neuter plural of -eus -eous suffix. Zoology. A. adj. Belonging or pertaining to the sub-class or class Somasteroidea, which belongs in the subphylum Asteroidea of star-shaped echinoderms and comprises extinct forms having broad, petal-like arms with a pinnate structure. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Echinodermata > [adjective] > of, belonging to, or characteristic of Asteroidea > belonging or relating to subclass Somasteroidea somasteroid1955 1955 L. H. Hyman Invertebrates IV. xv. 700 The arrangement recently adopted by palaeontologists.., according to which asteroids and ophiuroids derive from a common somasteroid..ancestor.., must be somehow wrong. 1964 Oceanogr. & Marine Biol. 2 394 Spencer..describes the transition from the early somasteroid stock to the phanerozone asteroids. B. n. A somasteroid echinoderm. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Echinodermata > [noun] > subphylum Eleutherozoa > class Asteroidea > subclass Somasteroidea > member of somasteroid1962 1962 D. Nichols Echinoderms iii. 40 The fossilized remains of these ossicles have even been found in the earliest asteroids, the Somasteroids. 1963 Philos. Trans. (Royal Soc.) B. 246 383 The Asterozoa, or star-shaped echinoderms, may be regarded as a natural taxon, comprising the somasteroids, asteroids and ophiuroids. 1979 W. D. Russell-Hunter Life Invertebr. xxxiv. 607 The smallest class, Somasteroidea, which arose in the Ordovician, was never an extensively diversified group, being relegated by many neontologists to the status of a subclass of the Asteroidea. (The living genus, Platasterias, is no longer regarded as a somasteroid.) This entry has not yet been fully updated (first published 1986; most recently modified version published online December 2020). < adj.n.1955
随便看	take no observe take no person take no persons take no prisoners take no stock in take note take notice take notice to take objection take occasion take occasion by the forehead take occasion by the forelock take occasion by the foretop take odds take odds of take of worth take off take off a person's hands take off an embargo take off guard take off his or her perch take off one's guard take off one's hat take off the books take off the table