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Psarolepis romeri
Taxonomy
Psarolepis romeri was named by Yu (1998) [Dermal bone surface with large, closely-spaced pores; fronto-ethmoidal shield longer than parietal shield; prominent snout with subterminal gape; pineal opening present; fenestra exonaria anterior dorsally positioned; fenestra exonaria posterior ventrally enclosed by dorso-lateral flange of premaxilla; median rostral toothed and taking part in jaw margin; pars palatina of premaxillae meeting each other in midline as thin strip behind tooth pad of median rostral; upper jaw margin Mshaped in anterior and ventral views; parasphenoid small and lozenge-shaped; internal carotid artery canal not piercing parasphenoid; internasal cavity large and deep, with posterior extensions flanking dorso-lateral margin of parasphenoid; nasal capsule with no ventral or ventrolateral opening leading to mouth cavity; sphenoid region very short; suborbital ledge very wide, with lateral margin bearing articular area for palatoquadrate; basipterygoid process not well-developed; suprapterygoid process absent; postorbital pillar flanking lateral cranial wall; notochordal pit ventrally surrounded by curved groove possibly for attachment of connective tissue sheath; lower jaw with five coronoids; external surface of lower jaw with three large fossae]. Its type specimen is IVPP V6795, a partial skull (Anterior cranial portion), and it is a 3D body fossil.
Synonymy list
Year | Name and author |
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1998 | Psarolepis romeri Yu figs. 1-7 |
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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.
†Psarolepis romeri Yu 1998
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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Source: c = class, subp = subphylum | |||||
References: Carroll 1988, Hendy et al. 2009 |
Age range: Lochkovian or 419.20000 to 410.80000 Ma
Collections: one only
Time interval | Ma | Country or state | Original ID and collection number |
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Lochkovian | China (Yunnan) | Psarolepis romeri (162781) |