Topic
Atractopyge
About: Atractopyge is a research topic. Over the lifetime, 3 publications have been published within this topic receiving 23 citations.
Papers
1 Jan 2000
TL;DR: 14 species, belonging to 9 genera and 7 families, from the Upper Ordovician Miaopo Formation in Yichang and Zigui, western Hubei, are restudied on the basis of new materials to suggest to synonymize greatly the previously described species.
Abstract: 14 species, belonging to 9 genera and 7 families, from the Upper Ordovician Miaopo Formation in Yichang and Zigui, western Hubei, are restudied on the basis of new materials. The preservation, deformation, depression and the morphological changes during ontogeny of species suggest to synonymize greatly the previously described species. Telephina longicephala seems to be a sexually dimorphic species. The first record of Atractopyge in the Miaopo Formation extended its range from the overlying Linxiang Formation down to the formation. Lonchodomas Zhangi sp. nov. is named for the open nomenclature species Lonchodomas cf. yohi described by Zhang Tairong (1988) from the Taleji River Formation (Lower Ordovician) Guozigou, Xinjiang.
21 citations
TL;DR: A smooth triangular area on the anteromesial part of the glabella bears a deep pit and is probably a muscle insertion structure equivalent to the median pits or furrows in other cybelines, notably Cybeloides, Bevanopsis and Cybelurus.
Abstract: Cybele bellatula (Dalman), the type species of Cybele, is redescribed from the lower Kunda Stage (uppermost Arenig-lowest Llanvim) of Ostergotland and a lectotype is chosen. Comparative material from Norway is also illustrated. A smooth triangular area on the anteromesial part of the glabella bears a deep pit and is probably a muscle insertion structure equivalent to the median pits or furrows in other cybelines, notably Cybeloides, Bevanopsis and Cybelurus. A new species, Atractopyge dalmani, is described on the basis of specimens from the Upper Jonstorp Formation (middle Harjuan-middle Ashgill) of Vastergotland. These specimens were once thought to include the holotype of A. verrucosa, the type species of Atractopyge, to which A. dalmani was probably closely related.
6 citations
TL;DR: Five taxa of the small trilobite genus Atractocybeloides are presented from Middle to Late Ordovician erratic boulders, including the new species Atractcybeloide nebeni n.
Abstract: . Aus mittel- bis oberordovizischen Geschieben werden funf Taxa der kleinwuchsigen Trilobitengattung Atractocybeloides vorgestellt, davon die beiden neuen Arten Atractocybeloides nebeni n. sp. und Atractocybeloides oepiki n. sp. Die Gattung wurde 1991 an Fragmenten aufgestellt. Sie hat sich in der Aseri-Stufe aus Cybele entwickelt. Neue Funde und das reichhaltige Material aus der Sammlung Rhebergen, in der auch fast vollstandige Panzerhemden von A. berneri enthalten sind, ermoglichten eine Rekonstruktion. Weiterhin wird die aus Norwegen beschriebene Art Atractopyge gracilis der Gattung Atractocybeloides zugeordnet. Grose Ahnlichkeiten bestehen zur ungefahr gleichaltrigen nordamerikanischen kleinwuchsigen Gattung Cybeloides. Five taxa of the small trilobite genus Atractocybeloides are presented from Middle to Late Ordovician erratic boulders, including the new species Atractocybeloides nebeni n. sp. and Atractocybeloides oepiki n. sp. The genus was errected in 1991 on the basis of fragmentary material. It evolved from Cybele during Aseri-zone times. A reconstruction is made possible due to new finds and the rich material from the Rhebergen collection, including nearly complete cuticles of A. berneri. Furthermore, Atractopyge gracilis from Norway is assigned to Atractocybeloides. Strong similarities exist to the roughly coeval, small trilobite genus Cybeloides, which is known from North America. doi: 10.1002/mmng.20020050108
1 citations
Performance Metrics
| Year | Papers |
|---|---|
| 2002 | 1 |
| 2000 | 1 |
| 1988 | 1 |