Australokaskia corrugata Engel & Morris 1994

Vanderlaan, Tegan A. & Ebach, Malte C., 2015, A review of the Carboniferous and Permian trilobites of Australia, Zootaxa 3926 (1), pp. 1-56 : 26

Australokaskia corrugata Engel & Morris 1994

Figs. 5.1–5.3.

1994 Australokaskia (Australokaskia) corrugata Engel & Morris ; p. 82–84, pl. 1, figs. 1–9.

Holotype. AMF90247a/b (external mould of cranidium and librigena).

Paratype material. From NU L484: AMF90248 (internal cephalon and partial thorax), AMF90249 (external dorsal shield), AMF90250 (external librigena), AMF90251 (external librigena), AMF90252 (external pygidium), AMF90253 (external pygidium), AMF90254 (internal pygidium). From NU L890: AMF90255a/b (internal cranidium/pygidium), AMF90256 (external cranidium), AMF90257 (partial external cephalon), AMF90258 (internal cranidium), AMF90259 (external pygidium), AMF90260 (external pygidium), AMF90261 (internal librigena), AMF90262 (internal librigena), AMF90263 (external pygidium), AMF90264 (external pygidium), AMF90265 (external pygidium), AMF90266 (external pygidium), AMF90267 (external pygidium), AMF90268 (external pygidium), AMF90269 (internal pygidium), AMF90270 (internal pygidium), AMF90271 (internal pygidium), AMF90272 (internal pygidium), AMF90273 (internal pygidium). From NU L353: AMF90274 (internal pygidium).

Locality. Type—NU L484. Other—NU L890, NU L353.

Emended diagnosis. Glabella not reaching anterior margin, separated by very narrow furrow; widest at δ; L1 small, rounded; S2 & S3 distinct but short; anterior border with terrace ridges; β – β wider than δ – δ; eyes long, moderately wide; lateral borders steeply inclined; short genal spines. Pygidium with 11 axial rings, seven pleural ribs; wide border with distinct border furrow.

Remarks. Two characteristics of the original diagnosis (Engel & Morris 1994) are not clearly visible on the external moulds. These include an “antennal pore” (= fossula) and a detailed description of nodular ornament on the pygidial rings and ribs. They are not included in the emended diagnosis.