| Introduction | | Search taxa | | Taxon tree | | Specimens | | Attributes | | Literature | | Photo gallery | | Stats | | Log in |
Echinoidea source details
Saucède, T., Bonnot, A., Marchand, D. & Courville, P. 2013. A revision of the rare genus Cyclolampas (Echinoidea) using morphometrics with description of a new species from the Upper Callovian of Burgundy (France). Journal of Paleontology 87, 105-121.
168854
10.1666/12-015r.1 [view]
Saucede, T.; Bonnot, A.; Marchand, D.; Courville, P.
2013
A Revision of the Rare Genus Cyclolampas (Echinoidea) Using Morphometrics with Description of a New Species from the Upper Callovian of Burgundy (France)
Journal of Paleontology
87(1), 105-122
Publication
Available for editors
The discovery of a new species, Cyclolampas altus new species in the upper Callovian of Burgundy (France) leads to the systematic revision of the rare echinoid genus Cyclolampas Pomel, 1883. Two morphometric approaches are used jointly to describe and quantify variations in test shape: the analysis of linear measurements and the Elliptic Fourier shape analysis. Both analyses yield congruent results that highlight the amplitude of within-species variations and quantify the part due to allometry. Along with the description of C. altus, the systematic position of species formerly assigned to the genera Pygorhytis Pomel, 1883 and Cyclolampas is amended. Previously attributed to the genus Pygorhytis, Cyclolampas castanea (Desor, 1858) is reassigned to the genus Cyclolampas on the base of new observations. Conversely, the examination of the Bajocian species Pygorhytis kiliani (Lambert, 1909) and Pygorhytis gillieroni Desor in Desor and de Loriol, 1872, which were previously assigned to Cyclolampas now supports their taxonomic reassignment to the genus Pygorhytis. Finally, the two species Cyclolampas verneuili (Cotteau, 1870) and Cyclolampas cotteaui Mintz, 1966 (nomen nudum) are considered junior synonyms of the genus type species Cyclolampas voltzii (Agassiz, 1839). The questioned origin date of the genus, estimated either to the Bajocian or to the Oxfordian, is now clearly established to be upper Callovian. These new results fit well with the overall scheme of atelostomate echinoid evolution and migration to deep-sea environments during the Middle and Upper Jurassic.
Date action by
Collyrites (Cyclolampas) verneuili (Cotteau, 1870) † accepted as Cyclolampas voltzii (L. Agassiz, 1839) † (status source)
Collyrites (Cyclolampas) voltzi † accepted as Collyrites (Cyclolampas) voltzii (L. Agassiz, 1839) † accepted as Cyclolampas voltzii (L. Agassiz, 1839) † (basis of record) Collyrites (Cyclolampas) voltzii (L. Agassiz, 1839) † accepted as Cyclolampas voltzii (L. Agassiz, 1839) † (basis of record) Collyrites castanea Desor, 1858 † accepted as Cyclolampas castanea (Desor, 1858) † (basis of record) Collyrites tumulus (Gregory, 1893) † accepted as Cyclolampas castanea (Desor, 1858) † (basis of record) Collyrites verneuili Cotteau, 1870 † accepted as Cyclolampas voltzii (L. Agassiz, 1839) † (status source) Collyrites voltzii (L. Agassiz, 1839) † accepted as Cyclolampas voltzii (L. Agassiz, 1839) † (basis of record) Cyclolampas Pomel, 1883 † (redescription) Cyclolampas altus Saucède, Bonnot, Marchand & Courville, 2013 † (original description) Cyclolampas castanea (Desor, 1858) † (new combination reference) Cyclolampas cotteaui Mintz, 1966 † (basis of record) Cyclolampas verneuili (Cotteau, 1870) † accepted as Cyclolampas voltzii (L. Agassiz, 1839) † (status source) Cyclolampas voltzi † accepted as Cyclolampas voltzii (L. Agassiz, 1839) † (basis of record) Cyclolampas voltzii (L. Agassiz, 1839) † (redescription) Disaster voltzii (L. Agassiz, 1839) † accepted as Cyclolampas voltzii (L. Agassiz, 1839) † (basis of record) Dysaster voltzii L. Agassiz, 1839 † accepted as Cyclolampas voltzii (L. Agassiz, 1839) † (basis of record) Pygomalus castanea (Desor, 1858) † accepted as Cyclolampas castanea (Desor, 1858) † (basis of record) Pygorhytis castanea (Desor, 1858) † accepted as Cyclolampas castanea (Desor, 1858) † (basis of record) Pygorhytis tumulus Gregory, 1893 † accepted as Cyclolampas castanea (Desor, 1858) † (basis of record)
Syntype GR PC.1710, geounit France, identified as Cyclolampas altus Saucède, Bonnot, Marchand & Courville, 2013
Syntype GR PC.1711, geounit France, identified as Cyclolampas altus Saucède, Bonnot, Marchand & Courville, 2013 Syntype UBGD 277474, geounit France, identified as Cyclolampas altus Saucède, Bonnot, Marchand & Courville, 2013 Diagnosis Apical system exocyclic (posterior ocular plates and periproct not in direct contact) and disjuncted, the anterior ... [details] Diagnosis Test extremely inflated in height, conical in shape. Test height about 70% of test length on average. Maximum ... [details] Diagnosis Test moderately high, height about 60% of test length on average. Apex a little anterior in position, with maximum ... [details] Diagnosis Test moderately high, though variable, test height about 60% of test length on average. Apex excentric posteriorly, ... [details] Etymology From the Latin altus, meaning high, referring to the relative high test of the species. [details] Fossil range Middle Jurassic, upper Callovian (Quenstedtoceras lamberti Zone) [details] Status Considered to represent Cyclolampas voltzii (L. Agassiz, 1839). [details] Stratigraphy Oolite ferrugineuse Formation [details] Type locality Hauteville-lès-Dijon (N 47°22‘00‘‘, E 4°59‘44‘‘) in Burgundy, Côte d’Or, France [details] Type material ST: GR-PC.1710, GR-PC.1711, UBGD 277474 [details] |