Dalecarlioceras Frye, 1987

Kröger, Björn, 2025, The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia, European Journal of Taxonomy 978, pp. 1-169 : 85-86

publication ID

https://doi.org/10.5852/ejt.2025.978.2801

publication LSID

lsid:zoobank.org:pub:422E6F06-B4C8-4840-854C-811145D88B32

persistent identifier

https://treatment.plazi.org/id/93268783-9622-7073-FDBE-F911FACBFE83

treatment provided by

Plazi (2025-03-07 10:46:31, last updated 2025-03-07 11:32:00)

scientific name

Dalecarlioceras Frye, 1987
status

 

Genus Dalecarlioceras Frye, 1987 View in CoL

Type species

Dalecarlioceras bodense Frye, 1987 View in CoL , Kallholn, Dalarna, Sweden, Boda Limestone, latest Katian; by original designation

Diagnosis

Moderately to rapidly enlarging, cyrtoconic, exogastric brevicones with compressed conch cross section; mature body chamber gibbous with maximum gibbosity at mid-length, becoming compressed orad;

dorsal conch profile straight to faintly concave, ventral conch profile moderately convex; aperture may be constricted with prominent hyponomic sinus; siphuncle situated close to venter, small in diameter, with tubular to fusiform segments, no endsiphuncular deposits known. (Adopted from Frye 1987.)

Frye M. W. 1987. Upper Ordovocian (Harjuan) oncoceratid nautiloids from Boda Limestone, Siljan District, Sweden. Geologiska Foreningens i Stockholm Forhandlingar 109: 83-99. https://doi.org/10.1080/11035898709454748