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Glyphaspis
Taxonomy
Glyphaspis was named by Poulson (1927) [Sepkoski's age data: Cm mMid-u Sepkoski's reference number: 81,1089]. It is not extant.
It was assigned to Asaphiscidae by Sundberg (1994); to Anomocarellidae by Jell and Adrain (2002); and to Ptychopariida by Sepkoski (2002).
It was assigned to Asaphiscidae by Sundberg (1994); to Anomocarellidae by Jell and Adrain (2002); and to Ptychopariida by Sepkoski (2002).
Species
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1927 | Glyphaspis Poulson |
| 1960 | Americare Lochman and Hu |
| 1994 | Glyphaspis Sundberg pp. 99 - 100 |
| 2002 | Glyphaspis Jell and Adrain p. 379 |
| 2002 | Americare Sepkoski |
| 2002 | Glyphaspis Sepkoski |
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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.
G. †Glyphaspis Poulson 1927
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†Glyphaspis calenus Walcott 1916
†Glyphaspis camma Walcott 1916
†Glyphaspis capella Walcott 1916
†Glyphaspis concavus Sundberg 1994
Invalid names: Americare Lochman and Hu 1960 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. A. Sundberg 1994 | Asaphiscidae with cranidia with short, tapered glabella, lateral glabellar furrows shallow to absent, frontal glabellar lobe rounded to bluntly rounded, shallow to moderate depth preglabellar and axial furrows, straight to slightly concave axial furrows, moderately strong ocular ridges, long palpebral lobes, posterior area of fixigena exsagittally narrower than occipital ring, fixigena moderately narrow, slightly convex preglabellar field and anterior area of fixigena, wide, moderately to strongly concave anterior border, anterior border furrow typically very faint. Pygidia large, subcircular, rounded anterolateral corners; multisegmented, well-defined, narrow axis reaching to border furrow or extending into border; pleural field well defined, pleural furrows shallow, extend- ing onto border, interpleural furrows very shallow typically not extending onto border, low convexity; wide, slightly to moderately concave border; smooth, evenly rounded lateral and posterior margin. |