Ovicell development in the early calloporid Wilbertopora Cheetham, 1954 (Bryozoa: Cheilostomata) from the mid-Cretaceous of the USA

Andrew N. Ostrovsky, Paul D. Taylor

Research outputpeer-review

10 Citations (Scopus)

Abstract

The calloporid Wilbertopora Cheetham, 1954 is the oldest known cheilostome with brood chambers (ovicells). The pattern of initial ovicell formation, involving a single ooecial rudiment, is more reminiscent of ovicell development in some Recent cribrimorphs and other more advanced cheilostomes than it is of Recent calloporids that have a double rudiment. The distrubution of early ovicell developmental types among cheilostomes is discussed. During later ovicell growth in Wilbertopora two lateral lobes fuse to form the hemispherical hyperstomial ovicell. This fusion process demonstrates how such ovicells could have originated from a more primitive bispinose precursor.

Original languageEnglish
Title of host publicationBryozoan Studies 2004 - Proceedings of the 13th International Bryozoology Association Conference
Pages223-230
Number of pages8
Publication statusPublished - 1 Dec 2005
Event13th International Conference of the International Bryozoology Association, IBA - Concepcion
Duration: 11 Jan 200416 Jan 2004

Publication series

NameBryozoan Studies 2004 - Proceedings of the 13th International Bryozoology Association Conference

Conference

Conference13th International Conference of the International Bryozoology Association, IBA
CountryChile
CityConcepcion
Period11/01/0416/01/04

Scopus subject areas

  • Environmental Chemistry
  • Environmental Engineering

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