Phacopida

Gravicalymene bakeri

Order Phacopida / Suborder Calymenina / Superfamily Calymenoidea / Family Calymenidae

Katian (Late Ordovician)Australia

Gravicalymene bakeri — photo 1 — Photo 1 · Baker, Thomas Stewart Baker, the fourth lead actor in the famous British science-fiction TV series Doctor Who, who Holotype AM F146518 (Australia; Smith et al., 2020) Paratypes (Australia; Smith et al., 2020) Restoration (modified) and a Photoshopped "complete dorsal exoskeleton" (Australian Museum)

Gravicalymene bakeri — photo 2 — Photo 2 · Baker, Thomas Stewart Baker, the fourth lead actor in the famous British science-fiction TV series Doctor Who, who Holotype AM F146518 (Australia; Smith et al., 2020) Paratypes (Australia; Smith et al., 2020) Restoration (modified) and a Photoshopped "complete dorsal exoskeleton" (Australian Museum)

Gravicalymene bakeri — photo 3 — Photo 3 · Baker, Thomas Stewart Baker, the fourth lead actor in the famous British science-fiction TV series Doctor Who, who Holotype AM F146518 (Australia; Smith et al., 2020) Paratypes (Australia; Smith et al., 2020) Restoration (modified) and a Photoshopped "complete dorsal exoskeleton" (Australian Museum)

Classification

Order Phacopida / Suborder Calymenina / Superfamily Calymenoidea / Family Calymenidae

Genus

Gravicalymene Shirley, 1936

Genus author

Shirley J.

Genus etymology

gravi, gravis, heavy; Calymene, a trilobite genus name

Species

G. bakeri Smith & Ebach, 2020

Species author

Smith P. M. & Ebach M. C.

Species etymology

inspired the two authors to pursue scientific careers.

Age

Katian (Late Ordovician)

Distribution

Australia

Diagnosis

Glabella semi-cylindrical, tapering forward, with three pairs of glabellar furrows; preglabellar field long; anterior border upturned; eyes small, kidney-shaped; eye ridges absent; librigenae medium-wide with spineless genal angles. Thorax of 12 segments; axis narrower than pleurae; pleural furrows wide and deep, pleural tips rounded. Pygidium lens-shaped; axis rounded-triangular, of 5-6 rings; pleural and interpleural furrows faint.