Atlanticalymene bardensis Adrain & Karim 2020, n. sp.

• Main Authors: Adrain, Jonathan M., Karim, Talia S., McAdams, Neo E. B.
• Format: Other/Unknown Material
• Language: unknown
• Published: 2020
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Trilobita; Phacopida; Bathycheilidae; Atlanticalymene; Atlanticalymene bardensis; Bolton; Canada; Main Brook; Marechal Island; Table Cove; Tickle; Newfoundland
• Online Access: https://zenodo.org/record/4537332; https://doi.org/10.5281/zenodo.4537332

Atlanticalymene bardensis n. sp. Plates 1–7 1965 Ischyrophyma? sp. ind.; Whittington, p. 340, pl. 19, figs 16, 19, 20. 1965 Komaspidid? pygidium; Whittington, p. 374, pl. 39, figs 8, 9. 1965 aff. Calymenidius sp. ind.; Whittington, p. 419, pl. 59, figs 10, 12–15. 1967 Protocalymene sp.; Ross, p. D27. 1970 Protocalymene sp.; Ross, p. 92. 1977 Protocalymene sp.; Siveter, p. 388. 1990 Protocalymene sp.; Fortey, p. 568. 1997 Sthenarocalymene sp.; Adrain and Fortey, p. 105. 1999 “aff. Calymenidius sp. ind.” of Whittington; Fortey and Droser, p. 199. 2002 Protocalymene sp.; Turvey, p. 56. 2011 Calymenia sp.; Shaw and Bolton, p. 417. 2014 Sthenarocalymene sp.; Zhou et al., p. 115. 2016 Sthenarocalymene sp.; Zhou et al., p. 322. Material. Holotype, cranidium, GSC 135298 (Pl. 2, figs 10, 13–15), and assigned specimens GSC 135289–135297, 135299–135358, from horizons TCM 13, TCM 14, and TCM 18, Table Cove Formation (Darriwilian), coast opposite Marechal Island, near Main Brook, Hare Bay, Great Northern Peninsula, western Newfoundland. Assigned specimens GSC 18345, 18346, 18369, 18569, Table Cove Formation (Darriwilian), Table Cove, west coast of Great Northern Peninsula, western Newfoundland, Canada. Etymology. From Bard Island Tickle, a local name for the type locality. Diagnosis. Interocular fixigena very broad; librigena subtriangular in outline, posterior facial suture hardly bowed compared with other calymenine taxa; eye small; rostal plate with gently ventrally curved ventral sector, longer exsagittally than sagittally in plan view, smooth and posteriorly concave doublural sector; hypostome with large anterior wings, lacking rhynchos, and with posteromedian spine in addition to the conventional paired posterolateral spines, posterior border long (sag.; exsag.); thoracic segments with anterior and posterior pleural bands subequal in length (exsag.), tuberculate sculpture on both but more prominent on posterior band; pygidium with four distinct axial rings, fourth not fully defined by ring furrow posteriorly in some ...