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Accession Number

PEH.301P.A.b

Geological Time Period

Middle Ordovician to Permian

Kingdom

Animalia

Phylum

Cnidaria

Subphylum

Anthozoa

Subclass

Zoantharia/ Hexacorallia

Order

Rugosa

Physical Characteristics

Short and curved triangular specimen with grey coloring. Growth lines can be seen.

Description

Likely from Iowa City, Iowa; The order Rugosa got its name from their “rugose” (wrinkled) outer wall. They are also referred to as “horn corals” because of their ‘horned’ shape. The order varies on their colonial or solitary lifestyle. Horn corals have an assortment of shapes, ranging from solitary forms (like Zaphrentis or Streptelasma) to irregular shapes (like Heliophyllum) to colonial arrangements (like Hexagonaria). This specimen is a solitary horn coral, but there is not much we can say about it because of its lack of septa detailing. Rugosids were members of the Siluro-Devonian reef complexes and suffered because of the Devonian extinctions. For solitary horn corals, it is thought that they reproduced mostly through sexual means and budding.

Number of Pieces

2

Resources

https://youtu.be/_A3UFOM7UIQ?si=PicvqmzRcv3pAQbB

Measurements (cm.)

6

Ursinus Acquisition Date

5-31-2007

Donor

Dr. E Lee Porter

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