Echinoidea name details
original description (unavailable nomenclaturally)
Vaziri, M. R. & Arab, A. L. 2012. Two new species of Arbacioid echinoids (genus Goniopygus) from the Aptian sediments of Baghin area (Kerman, Iran). Iranian Journal of Science & Technology A3, 231-237. page(s): 232; fig. 3d-f, 7D-F [details] Available for editors
From editor or global species database
Diagnosis This species differs from G. triangularis in the following counts. In G. annularis peristome is relatively small, 54-56.5% of the test diameter, while in G. triangularis the peristome is very large, 63-72.5% of the test diameter. Secondly, the periperoct outline of G. triangularis is triangular, having three sunken tubercles located alternatively adjacent to three genital plates. In G. annularis the periperoct is circular and there are no sunken tubercles. Thirdly, in G. annularis the test is hemispherical in profile, whereas in G. triangularis the profile of the test is rather domed. [details]
Distribution Baghin area, west of Kerman City, Kerman Province, Iran [details]
Etymology annularis (Latin) referring to the circular shape of the periperoct.
[details]
Type material no type designated; 4 specimens mentioned, figured one is KUIC 12039 [details]
From editor or global species database
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