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Nevadella
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 Nevadioidea by Lieberman (2001); to Olenellida by Sepkoski (2002); and to Nevadiidae by Palmer and Repina (1993), Whittington et al. (1997) and Bushuev et al. (2014).
It was assigned to Nevadioidea by Lieberman (2001); to Olenellida by Sepkoski (2002); and to Nevadiidae by Palmer and Repina (1993), Whittington et al. (1997) and Bushuev et al. (2014).
Synonymy list
| Year | Name and author |
|---|---|
| 1936 | Nevadella Raw |
| 1993 | Nevadella Palmer and Repina p. 31 |
| 1997 | Nevadella Whittington et al. p. 428 |
| 2001 | Nevadella Lieberman p. 106 |
| 2002 | Nevadella Sepkoski |
| 2014 | Nevadella Bushuev et al. p. 356 |
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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. †Nevadella Raw 1936
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†Nevadella bacculenta Fritz 1972
†Nevadella cartlandi Raw 1909
†Nevadella effusa Repina 1974
†Nevadella eucharis Walcott 1913
†Nevadella faceta Fritz 1972
†Nevadella keelensis Abe et al. 2010
†Nevadella mountjoyi Fritz 1992
†Nevadella perfecta Walcott 1913
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. R. Palmer and L. N. Repina 1993 | Nevadiidae 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. |