Mayrocaris Polz, 1994

Laville, Thomas, Forel, Marie-Béatrice & Charbonnier, Sylvain, 2023, Re-appraisal of thylacocephalans (Euarthropoda, Thylacocephala) from the Jurassic La Voulte-sur-Rhône Lagerstätte, European Journal of Taxonomy 898 (1), pp. 1-61 : 22

Genus Mayrocaris Polz, 1994

Type species

Mayrocaris bucculata Polz, 1994 by monotypy.

Original diagnosis (literal translation from Polz 1994)

Carapace subtrapezoid, without a clearly delineated optic notch, however, with a pronounced subquadratic notch; ventral line from here slopping down at 45° angle, almost equally ascending from the middle of the carapace, forming, together with the lowest part of the anterior margin, a characteristic U-shaped bulge; hinge line on the whole slightly convex, terminating in a pointed spine; rostrum inconspicuous; carapace surface roughly sculptured only by a short horizontal, very delicate ridge, and by eight small bases of spines, micro-relief in the form of single, very small arched lines on an ultrafine faveolated surface; anterior lobes larger than in comparable genera, protruding from the carapace not only anteriorly, but even projecting over its antero-ventral section; abdomen segmented. Kind of large appendages not clausocarid, course of anterior carapace margin conchyliocarid.

Emended diagnosis

Thylacocephala with a slightly developed optic notch, a serrate dorsal margin consisting of a carina, a rounded postero-dorsal spine, a posterior notch, and an anterior part of the ventral margin oriented antero-dorsally and bearing a square notch.