Cornulites corragatus

C corrugatus 250px

Classification
Phylum: Mollusca
Class: Tentaculita
Family: Cornulitidae
Genus: Cornulites
Species: Cornulites corrugatus (Hall, 1888)

Stratigraphic Occurrences

C.corrugatus_strat

Geographic Occurrences

Map point data provided by iDigBio.

Stratigraphic Description

Sequences (Formations)

  • C3 Sequence (Mount Auburn, Corryville)
  • C2 Sequence (Bellevue, Fairview: Fairmount, Mount Hope)

Identification in Hand Sample

  • Clustered tubes grow on mollusk shells
  • Conical and gently curved
  • Many conical tubes radiating from common point
  • full length tube is around 12mm
  • Composed of conical, imbricating rings, giving tube a strongly annulated appearance

Cornulites corrugatus from Waynesville formation of Warren County, Ohio (OUIP 1531)

Published Description

Davis (1998):

  • Annelid worm tube. Illustration shows many conical tubes radiating from a common point. Note crooked tubes and coarse transverse corrugations. Entire Maysvillian.

Hall (1888):

  • Tubes growing socially in clustered masses upon the shells of mollusks; calcareous; destitute of vesicular structure; conical, and gently curved. Attached by their smaller extremities, sometimes for the space of a line or more; and either partially free, or contiguous to one another throughout the remainder of their course. A length of the fully grown tube one-half inch or a little more; diameter of tube at mouth one tenth of an inch. Tybe composed of conical imbricating rings, about forty in the space of one inch (about four in the space of one-tenth of an inch), giving the tube a strongly annulated appearance.
  • The specimen figured exhibits the tubes of more than thirty individuals of Conchicolites corrugatus, attached to the spire of Cyclonema bilix, Conrad.
  • From Conchicolites gregarious, the present species is distinguished by its greater average length and much greater diameter, by its much less closely crowded habit, and by its much more strongly marked annulations
  • Locality and formation. Attached to the shell of Cyclonema bilix, from the Hudson River Group of Cincinnati, Ohio.