Catillicephala cifellii Westrop & Dengler 2022, sp. nov.

• Main Authors: Westrop, Stephen R., Dengler, Alyce A.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2022
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Trilobita; Ptychopariida; Catillicephalidae; Catillicephala; Catillicephala cifellii; Canada; Shallow Bay; Broom Point; Downes Point; Newfoundland
• Online Access: https://doi.org/10.5281/zenodo.11093738; http://treatment.plazi.org/id/03D887C549697F58FC89FD7B5DD574AB

Catillicephala cifellii sp. nov. Figs. 1–3. Zoobank LCID : urn:lsid:zoobank.org:act: 4B4919F0-DFB7-4569-B8 B1-1A2DE79BACFD Etymology : In honour of Richard Cifelli upon his retirement and in recognition of his studies of Cretaceous mammals. Type material : Holotype: GSC 142512, well preserved cranidium (Fig. 1A). Paratypes: five cranidia (GSC 142513–142515, Fig. 1; GSC 142517, Fig. 2B; GSC 142519, Fig. 2D), five pygidia (GSC 142520– 142524, Fig. 3) from boulder BPS 467; one cranidium (GSC 142516, Fig. 2A) from boulder BPS 468; one cranidium (GSC 142518, Fig. 2C) from boulder BPS 458. All from the type locality. Type locality : Broom Point South, western Newfoundland, Canada. Type horizon : Boulder BPS 467, Downes Point Member, Shallow Bay Formation, Guzhangian, Miaolingian, Cambrian. Material .— The type material and two pygidia from boulder BPS 467; two cranidia and two pygidia from boulder BPS 458. All from the type locality. Diagnosis .— Catillicephala with ovoid glabella, occipital ring subtriangular, drawn out posteriorly into stout spine, and short, narrow anterior border tapered laterally. Description .—Strongly convex cranidium subtrapezoidal in outline (excluding LO), with curved anterior margin; preoccipital glabella length 54% (51–58%) maximum cranidial width across posterolateral projections. Frontal area represented only by very narrow, rim-like anterior border. Anterior border furrow finely etched, merges with preglabellar furrow; axial furrows shallow but clearly defined grooves, bowed gently outwards. Glabella barrel-shaped in outline, with outwardly curved flanks and gently rounded anteriorly; inflated, standing well above adjacent fixigenae in anterior view (e.g., Figs. 1A 3, 2B 1); width at anterior tip of S1 equal to 89% (81–94%; lower values in smaller specimens) preoccipital length. LO extended into stout, upwardly curved, triangular occipital spine in larger individuals (e.g., Figs. 1A 1, 2D). SO curved gently backwards, shallow, defined in part by break in slope between LO and ...