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Taxonomy
Arctinurus clairensis was named by Thomas (1929). Its type specimen is YPM 26132 and is a 3D body fossil.
Synonymy list
| Year | Name and author |
|---|---|
| 1929 | Arctinurus clairensis Thomas p. 17 figs. pl. 1, figs17–20 |
| 2021 | Arctinurus clairensis Holloway pp. 66 - 68 figs. Plate 1; Plate 2, Figs 9, 12 |
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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.
†Arctinurus clairensis Thomas 1929
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| D. J. Holloway 2021 | Anterior cephalic border less than twice as long sagittally as exsagittally, with broadly rounded margin; L1a small for genus; front of palpebral lobe lying well behind widest part of bullar lobe; anterior branch of facial suture converging gently in front of β–β, width α–α being much greater than width of fron- tal lobe. Hypostome 1.3 times as wide across shoulder as long (sag.); lateral margin strongly flexed outwards behind anterior wing and lateral border expanding gently; anterior lobe of middle body only slightly wid- er anteriorly than at outer end of middle furrow. Py- gidium with lateral margins subparallel, weakly con- vex in outline; maximum width approximately level with posterior end of axis; axis 0.3 times maximum pygidial width and approximately 0.4 times sagittal length; postaxial rib gently tapering backwards for less than half its length and subsequently expanding so as to exceed its anterior width distally. |
Measurements
No measurements are available
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| Source: g = genus, f = family, o = order, c = class | |||||
| References: Harrington et al. 1959, Aberhan et al. 2004, Whittington et al. 1997 | |||||