&amp;lt;i&amp;gt;Cyathochitina cycnea&amp;lt;/i&amp;gt; (Chitinozoa), a new name for &amp;lt;i&amp;gt;Cyathochitina giraffa&amp;lt;/i&amp;gt; Hennissen &amp;lt;i&amp;gt;et al&amp;lt;/i&amp;gt;., 2010

Thijs R A Vandenbroucke,Jan Hennissen,Thomas Servais

doi:10.1144/jmpaleo2012-014

Abstract

Hennissen et al . (2010) described a chitinozoan fauna from the Dawangou section in the Xinjiang region of China, an auxiliary Global Stratoype Section and Point (GSSP) for the base of the Upper Ordovician Series. The fauna contained one new species, which they named Cyathochitina giraffa . Their paper was published in December 2010 (formally accepted 10 July 2010). However, Grahn & Nolvak (2010) had already published a paper in June of the same year, including a different new species that was also named Cyathochitina giraffa . According to the rules of the International Code of Zoological Nomenclature (ICZN, 1999, Art. 52.3.), the species Cyathochitina giraffa Grahn & Nolvak, 2010 is the senior homonym and, therefore, has nomenclatural priority. The species described by Hennissen et al . (2010) needs to be renamed. Here, we introduce a new name for this species: Cyathochitina cycnea nom. nov. Incertae Sedis Group Chitinozoa Eisenack, 1931 Order Prosomatifera Eisenack, 1972 Family Lagenochitinidae Eisenack, 1931 Subfamily Cyathochitininae Paris, 1981 Genus Cyathochitina Eisenack, 1955 emend. Paris et al ., 1999 Cyathochitina cycnea …

Highlights

Its maximal diameter is situated at about one-fifth of the total chamber length above the base of the vesicle
This produces a two-dimensional chamber morphology that has the shape of an oval, i.e. tapering towards both aboral and oral ends of the chamber, but truncated at the base
The most important difference, between C. cycnea and C. giraffa is the morphology of the vesicle’s chamber: C. giraffa has a conical chamber, much like that of C. campanulaeformis, and its maximal width is at the basal margin

Summary

Introduction

Cyathochitina cycnea (chitinozoa), a new name for Cyathochitina giraffa Hennissen et al, 2010 The fauna contained one new species, which they named Cyathochitina giraffa. Grahn & Nõlvak (2010) had already published a paper in June of the same year, including a different new species that was named Cyathochitina giraffa.

Results

Conclusion