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- Title
Reconsideration of the systematics and distribution of the rhynchonellid brachiopod Atrypa mesacostale Hall, 1843 from the Late Givetian and Early Frasnian of New York.
- Authors
SARTENAER, Paul
- Abstract
The internal structures of the rhynchonellid brachiopod Atrypa mesacostale Hall, 1843 revealed for the first time, require a complete re-evaluation of its taxonomic status, stratigraphic significance and geographic distribution. Hall's species often mistakenly assigned to the genus Leiorhynchus Hall, 1860, is common and stratigraphically restricted to the late Givetian Geneseo or Unadilla Formation and the early Frasnian part of the Ithaca Formation (Genesee Group) in central New York. It is designated as the type species of Katabuporhynchus n. gen. in the family Platyterorhynchidae Savage, 1996 (revised and elevated to family rank). An earlier rhynchonellid, restricted to the late Givetian Tully Formation in east-central New York, and previously misidentified as Leiorhynchus mesacostalis, is described as E. alaura n. sp. in the genus Eumetabolotoechia Sartenaer, 1975, the type genus of Eumetabolotoechiidae n. fam. Three biostratigraphic zones are proposed: a Katabuporhynchus mesacostalis Zone, an Eumetabolotoechia alaura Zone, and a late Givetian North American Eumetabolotoechia Zone.
- Subjects
BRACHIOPODA; FOSSIL rhynchonellida; GEOLOGICAL formations; BIOSTRATIGRAPHY; TAXONOMY
- Publication
Geologica Belgica, 2014, Vol 17, Issue 3/4, p276
- ISSN
1374-8505
- Publication type
Article