Skip to content Skip to navigation

Product: 053 Mid-Dinantian ammonoids from the Craven Basin northwest England.


Please note: Shop orders will be subject to delays due key staff being on leave at this time.
This will not affect transactions associated with either joining, or renewing membership of, the Association.

Members' Discounts

You need to be a Member of The Palaeontological Association and Logged In to receive the Members' Discount.

Product - 053 Mid-Dinantian ammonoids from the Craven Basin northwest England. Image
Price: £40.00
Members' Discount: - £25.00
Stock Level: In Stock
Print Status: In Print
Weight: 0.30 KG

Description:

Special papers in Palaeontology: 53
<br />1996
<br />
<br />Mid-Dinantian ammonoids from the Craven Basin northwest England.
<br />N J Riley
<br />
<br />87 pp., 8 pls., 51 text-figs.
<br />
<br />ABSTRACT. A major new ammonoid-bearing sequence is described from the Worston Shale Group, which spans the late Tournaisian (early Chadian) to mid- Visean (early Asbian) interval in the Craven Basin of north-west England. The faunas are referable to the Fascipericyclus-Ammonellipsites (FA), Bollandites-Bollandoceras (BB) and lower part of the Beyrichoceras Zone (B 1) ammonoid zones. Particularly significant are the early Visean assemblages from the FA Zone, which are the most diverse known, apart from faunas described previously from the northern Urals of the former Soviet Union. The described assemblages comprise: Ammonellipsites clitheroensis sp. nov., Beyrichoceras afr. obtusum, Beyrichoceratoides injiatus sp. nov., B. sp. afr. komiorum, B. sp. 1, B. sp. 2, Bollandites varians sp. nov., Bo.? sp., Bollandoceras hodderense Bol. micronotum, Bol. sp. 1, Bol. sp. 2, Dimorphoceras leagramense sp. nov., Dzhaprakoceras bellmanense sp. nov., D. catena sp. nov., D. dej/exum, D. cf. djaprakense, D. j/exum sp. nov., D. hispanicum, D. levis sp. nov., D. paracatena sp. nov., D. subglobosum, D. undulatum sp. nov., D. westheadi sp. nov., Economismoceras planum sp. nov., Helicocyclus divergens sp. nov., Merocanites cf. applanatus, M. quadrilobus sp. nov., Michiganites sp., Nomismoceras rotiforme, Parahammatocyclus chaigleyensis gen. et sp. novo and Rotopericyclus postremus sp. novo Existing suprageneric classification is modified; the new superfamily Girtyocerataceae is erected together with two new subfamilies: the Ammonellipsitinae and Pericyclinae. Several genera are reclassified, including Beyrichoceras, transferred from the Anthracoceratidae to the Girtyoceratidae, and Bollandites, transferred from the Muensteroceratidae to the Pericyclinae.