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Hadrocephalites rhytidodes
Taxonomy
Hadrocephalites rhytidodes was named by Sundberg and McCollum (2002). Its type specimen is USNM 509485, a cephalon/head, and it is a 3D body fossil.
Synonymy list
Year | Name and author |
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2002 | Hadrocephalites rhytidodes Sundberg and McCollum pp. 89 - 92 figs. 12.1-12.4 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Hadrocephalites rhytidodes Sundberg and McCollum 2002
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Diagnosis
Reference | Diagnosis | |
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F. A. Sundberg and L. B. McCollum 2002 | Cranidia with rectangular outline (approximately 60 percent width), preglabellar field present (25 to 30 percent cranidial length), straight anterior border in larger specimens, plectrum present, wide fixigena (45 to 60 percent glabellar width), strongly posterolaterally directed ocular ridges, coarse and fine granules. Pygidium subrectangular with 3 to 4 axial rings, large terminal piece not overhanging pygidial border, and longer (exsag.) pleural furrows that extends only a short distance on to relatively narrow-based spines |
Measurements
No measurements are available
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Source: subo = suborder, c = class | |||||
References: Aberhan et al. 2004, Fortey and Owens 1999 |