rhombiferanadj.n.
/rɒmˈbɪf(ə)rən/, /rɒmˈbɪf(ə)rn̩/, U.S. /rɑmˈbɪf(ə)rən/ Palaeontology.
A. adj.
Of or relating to the class Rhombifera, which comprises cystoid echinoderms having diamond-shaped arrangements of pores on the thecal plates.
ΘΚΠ
the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Echinodermata > [adjective] > belonging to or characteristic of Pelmatozoa > belonging to order Cystoidea > rhombiferan
rhombiferan1920
1920 H. L. Hawkins Invertebr. Palæont. ii. iii. 160 Late forms of Rhombiferan Cystids, and perhaps of Amphoridea, have been reported from the Devonian, but they are inconspicuous.
1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) IV. 366/1 (caption) Rhombiferan cystoid (Echinoencrinus, Ordovician), showing pore rhomb and anus on side of calyx.
2003 C. E. Brett et al. in P. J. Harries High-resolution Approaches Stratigr. Paleontol. ix. 338 Thin packstone containing abundant plates and columnals of the rhombiferan cystoid.
B. n.
A rhombiferan echinoderm.
ΘΚΠ
the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Echinodermata > [noun] > division Pelmatozoa > member of class Cystoidea > rhombiferan
rhombiferan1954
rhombifer1960
1954 Bull. Mus. Compar. Zoöl. Harvard 112 131 Rhombiferans of the family Echinosphaeritidae are judged to be the most archaic representatives of the order.
1962 D. Nichols Echinoderms xi. 136 A section of a pore-rhomb..shows that in some rhombiferans the depressions between the pores of each pair were deep grooves.
1994 Jrnl. Paleontol. 68 324 Cuniculocystis floweri..appears to be a typical rhombiferan in most of its morphologic features except that it lacks pectinirhombs.
This entry has been updated (OED Third Edition, June 2010; most recently modified version published online March 2022).
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adj.n.1920