Topic
Zoroasteridae
About: Zoroasteridae is a research topic. Over the lifetime, 4 publications have been published within this topic receiving 106 citations.
Papers
1 Jan 1970
TL;DR: A new order, the Zorocallida, is erected for the Zoroasteridae and Calliasterellidae, and a new genus, Doraster, is described, with the type-species D. constellatus.
Abstract: Downey, Maureen E. Zorocallida, New Order, and Doraster constellatus, New Genus and Species, with Notes on the Zoroasteridae (Echinodermata: Asteroidea). Smithsonian Contributions to Zoology, 64: 1-18. 1970.—During a study of the Asteroidea of the Caribbean and Gulf of Mexico, a new genus of the family Zoroasteridae was discovered. A general survey of the family revealed apparent relationships with the fossil Calliasterellidae and prompted the conclusion that both of these families were incorrectly placed in the order Forcipulatida. A new order, the Zorocallida, is therefore erected for the Zoroasteridae and Calliasterellidae. The new genus, Doraster, is described, with the type-species D. constellatus. Several other observations on the classification of the Zoroasteridae are made, including the synonymizing of three species of Zoroaster found in the Atlantic. Official publication date is handstamped in a limited number of initial copies and is recorded in the Institution's annual report, Smithsonian Year. UNITED STATES GOVERNMENT PRINTING OFFICE
27 citations
TL;DR: Phylogenetic results suggest that the morphololgical resemblance between zoroasterids and Palaeozoic taxa, such as Calliasterella, is convergent but a paraphyletic Zoroasteride cannot be rejected and remains consistent with basal crown-group affinities.
27 citations
TL;DR: Morphological data suggest widespread homoplasy and therefore comprehensive generic or even species-level analyses are required to further evaluate questions of derivation and relationships among these taxa.
Abstract: SYNOPSIS. The superorder Forcipulatacea (Asteroidea, Echinodermata) includes two orders, the Brisingida and the Forcipulatida. The Forcipulatida is diverse, including the Asteriidae, Coscinasteriinae, Pedicellasteridae, Labidiasteridae, Neomorphasteridae, Pycnopodiinae (Asteriidae), Heliasteridae, and the Zoroasteridae, whereas the Brisingida is limited to the Brisingasteridae, Brisingidae, Freyellidae, Hymenodiscidae, and Odinellidae. A phylogenetic analysis of forcipulataceans using morphological characters resulted in 12 most parsimonious trees at a tree length of 68 steps. The Brisingida, recognized as basal in one early analysis and derived in another, is here considered to be derived. Two genera of pedicellasterids emerged as the sister group to the remaining Forcipulatida. Bremer and bootstrap measures show strong support for the brisingidan and zoroasterid plus neomorphasterid clades. Certain other traditional taxonomic groupings, including the Pedicellasteridae, Labidiasteridae, Asteriidae, and Pycnopodiinae, are not supported as monophyletic. Support for the pedicellasterids as a sister group to the remainder of the Forcipulatida is not robust. Morphological data suggest widespread homoplasy and therefore comprehensive generic or even species-level analyses are required to further evaluate questions of derivation and relationships among these taxa.
15 citations
TL;DR: A hypothesis of an older fauna present in the Antarctic during the Eocene, which was succeeded by a modern Antarctic fauna that is represented by the recently derived Antarctic Asteriidae and other forcipulatacean lineages is suggested.
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2011 | 1 |
| 2007 | 1 |
| 2000 | 1 |
| 1970 | 1 |