Australokaskia collina 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 : 26-27

Australokaskia collina Engel & Morris 1994

1994 Australokaskia (Australokaskia) collina Engel & Morris ; p. 86–88, pl. 2, figs. 1–19.

Holotype. AMF90295 (external mould of dorsal shield).

Paratype material. AMF90296a/b (external/internal dorsal shield), AMF90297 (internal dorsal shield), AMF90298 (external cranidium), AMF90299 (external librigena and cranidium), AMF90300 (external cranidium), AMF90301 (internal cranidium), AMF90302 (internal cranidium and thorax), AMF90303 (partial internal cranidium), AMF90304 (internal cranidium), AMF90305 (external cranidium), AMF90306a/b (external glabella, hypostome, librigena and pygidium), AMF90307a/b (external/internal dorsal shield), AMF90308 (external pygidium), AMF90309 (external pygidium), AMF90310 (external hypostome), AMF90311 (external pygidium), AMF90312 (internal pygidium), AMF90313 (internal pygidium).

Locality. NU L8.

Emended diagnosis. Glabella reaches anterior margin, expands anteriorly, widest at β; S1 distinct, L1 small, rounded; S2 and S3 distinct but short; eyes long; lateral border flat, with marginal terrace ridges; genal angles pointed to slightly rounded. Nine thoracic segments. Pygidium with 12 axial rings, eight pleural ribs; wide border with distinct furrow.

Remarks. Engel & Morris (1994) describe the pygidium of this taxon as having rows of very small nodes on the rings and ribs. These structures are not visible on the external moulds. The diagnosis has been emended to omit this characteristic.