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Authors: Blodgett, Robert B.
Editors:
Date: /1993
Title: Dutrochus, a new microdomatitid (Gastropoda) genus from the Middle Devonian (Eifelian) of west-central Alaska
67 , 1 , 194-197 , 2 figs.
Host: Journal of Paleontology :
Document Type: Article\Abst.\Chapter\report
Annotation: Abstract--A new gastropod genus, Dutrochus, is established for members of the family Microdomatidae that are characterized by a reticulate ornament of spiral cords and intersecting, finer collabral threads, with all but one spiral cord being of nearly equal strength, and the single remaining cord being of stronger (nearly twice the order) magnitude and being situated at the periphery. It is represented by the type and only known species, Dutrochus alaskensis n. gen. and sp., from the upper part (lower Middle Devonian; lower Eifelian) of the Lower? and Middle Devonian Cheeneetnuk Limestone, McGrath A-5 quadrangle, west-central Alaska. The genus is very close and nearly homeomorphic to the Permican microdomatid genus Glyptospira, but differs from the latter in possssing an extremely strong, peripheral spiral cord and an extremely thik, multi-layered apertural margin.
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79RB8 (10061-SD) , Mc Grath , Long. 155 deg. 09'23"W, Lat. 62 deg. 04'33"N. NE1/4, NW 1/4, NE1/4, NW1/4 sec. 21, T23N, R32W. Approximately 3.0 m (10 ft) thick silicified fossil horizon, the top of which is 101.5 m (333 ft) below the top of the Cheeneetnuk Limestone. (description from Rigby and Blodgett, 1983, p. 774)
Dutrochus alaskensis n. gen. and sp.
79RB9 (10062-SD) , Mc Grath , Long. 155 deg. 09'23"W, Lat. 62 deg. 04'33"N. NE1/4, NW1/4, NE1/4, NW1/4 sec. 21, T23N, R32W. Silicified fossil horizon, approximately 3.0 m (10 ft) thick, the top of which is 81.7 m (268 m) below the top of the Cheeneetnuk Limestone. (description from Rigby and Blodgett, 1983, p. 774)
Dutrochus alaskensis n. gen. and sp.