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Australosutura llanoensis
Taxonomy
Australosutura llanoensis was named by Brezinski (1998). Its type specimen is CM 35773, a cephalon/head, and it is a 3D body fossil.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1998 | Australosutura llanoensis Brezinski p. 720 figs. 3.1-3.8 |
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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.
†Australosutura llanoensis Brezinski 1998
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. K. Brezinski 1998 | Glabella cylindrical, preglabellar field straight, anterior border furrow narrow, sharply upturned, almost vertical to margin. Pygidium profile low, with very small, poorly defined tubercles.
Cranidium of moderate vaulting, glabella cylindrical in outline, exhibiting small tubercles, lp glabellar furrows broad, deep; 2p furrows indistinct. In longitudinal profile, glabella of even convexity, transverse profile crescentic with vertical sides. Dorsal furrow narrow, deepest between eyes, preglabellar furrow shallow, distinct. Lateral preoccipital lobes small, subtriangular in outline. Occipital furrow straight, narrow (longitudinal), moderately deep, occipital lobe narrow and of even width. Palpebral lobes small, crescentic, inclined into dorsal furrow. Preglabellar field straight, steeply inclined into border furrow, covered with coarse tubercles along upper slope and fine pits along lower. Border furrow narrow, sharply upturned, nearly vertical on furrow side. Border bluntly rounded at top, covered with fine terrace sculpture, then recurved beneath border. Anterior facial sutures with long, straight, diverging 7 to P section, sharply rounded at p. Posterior sutures with diverging, steeply descending £ to w section. Pygidium parabolic in outline, vaulting low. Axis tapers strongly toward posterior, sharply rounded posteriorly, composed of 13 rings, transverse profile suboctagonal, longitudinal profile straight. Rings narrow, sinuous, acutely rounded in longitudinal profile. Ring furrows broad, deep, rounded, slightly overhung by rings. Dorsal furrow sharp. Pleural fields evenly convex in transverse profile, composed of 8 ribs, which become increasingly recurved posteriorly so that posterior most rib is directed longitudinally. Posterior band of each rib slightly broader and higher in elevation than anterior band. Posterior band ornamented with small, poorly defined tubercles. Pleural furrows deep, broad, rounded, extending to margin, interpleural furrows narrow, distinct, only two anterior most reach lateral margin. Pygidial flange, posterior to axial terminus, broad, concave. |
Measurements
No measurements are available
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| Source: f = family, o = order, c = class | |||||
| References: Whittington et al. 1997, Aberhan et al. 2004, Fortey and Owens 1999 | |||||