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Biceratops

Trilobita - Redlichiida - Olenellidae

Taxonomy
Biceratops was named by Pack and Gayle (1971) [Sepkoski's age data: Cm Tojo-u]. Its type is Biceratops nevadensis.

It was assigned to Biceratopsinae by Pack and Gayle (1971) and Palmer and Repina (1993); to Olenellidae by Whittington et al. (1997); and to Olenellida by Sepkoski (2002).

Synonymy list
YearName and author
1971Biceratops Pack and Gayle p. 895
1993Biceratops Palmer and Repina p. 23
1997Biceratops Whittington et al. p. 409
2002Biceratops Sepkoski, Jr.

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Ecdysozoa
Panarthropoda
phylumArthropodaLatreille 1829
RankNameAuthor
subphylumMandibulata
classTrilobitaWalch 1771
orderRedlichiidaRichter 1932
suborderOlenellina
superfamilyOlenelloidea
familyOlenellidae
genusBiceratops

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
P. D. Pack and H. B. Gayle 1971A relatively smooth cephalon with well defined border of medium width, rounded genal angles and no genal spines. Glabella characterized by indistinct lat eral and axial furrows. Palpebral lobes short,directed upward and posteriorly, close along the sides of the glabella extending from the postero-lateral parts of the anterior glabellar lobe. Small eyes located laterally below the palpebral lobes slightly behind center of the glabella. Thorax consists of 15 prothoracic segments and 10 or more opisthothoracic segments. Third prothoracic segment is strongly macropleural and the fifteenth segment bears a long axial spine.
A. R. Palmer and L. N. Repina 1993Biceratopsinae with posterior margin of cephalon nearly straight. Genal angles broadly rounded; genalandintergenalspinesabsent.Preglabellarfield present; sagittal length equal to or less than that of border. Ocular lobes prominent, close to glabella; posterior tips opposite SI, elevated above top of glabella. Opisthothorax of at least 11 segments.