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Nevadella

Trilobita - Redlichiida - Nevadiidae

Taxonomy
Nevadella was named by Raw (1936) [Sepkoski's age data: Cm Atda-u Sepkoski's reference number: 81]. It is not extant. Its type is Callavia eucharis.

It was assigned to Olenellida by Sepkoski (2002); and to Nevadiidae by Palmer and Repina (1993), Whittington et al. (1997) and Bushuev et al. (2014).

Synonymy list
YearName and author
1936Nevadella Raw
1993Nevadella Palmer and Repina p. 31
1997Nevadella Whittington et al. p. 428
2002Nevadella Sepkoski, Jr.
2014Nevadella Bushuev et al. p. 356

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Ecdysozoa
Panarthropoda
RankNameAuthor
phylumArthropodaLatreille 1829
subphylumMandibulata
classTrilobitaWalch 1771
orderRedlichiidaRichter 1932
familyNevadiidaeHupé 1953
genusNevadellaRaw 1936

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.

Diagnosis
ReferenceDiagnosis
A. R. Palmer and L. N. Repina 1993Nevadiidae with glabella distinctly tapered forward, sides slightly concave so that width is narrowest opposite L2 or S2. Preglabellar field short (sag.) or absent. Basal glabellar width about equal to width of extraocular area opposite midlength of ocular lobe. Posterior tips of ocular lobes opposite Ll. Width of interocular area more than one-fourth width of extraocular area opposite midlength of ocular lobe. Thorax of 17 to 23 segments. Pleural spines long, falcate. Opisthothorax not clearly differentiated. Pygidium small, subquad rate.