Phillipsia collinsi, (Mitchell 1918)

Vanderlaan, Tegan A. & Ebach, Malte C., 2015, A review of the Carboniferous and Permian trilobites of Australia, Zootaxa 3926 (1), pp. 1-56 : 38-39

Palaeophillipsia collinsi (Mitchell 1918)

Figs. 6.7 & 6.10

1878 Phillipsia seminifera de Koninck; p. 210, pl. 24, fig. 9.

1878 Phillipsia seminifera ; Etheridge Jr., p. 42.

1892a Phillipsia seminifera ; Etheridge Jr., p. 124, 131.

1892a Griffithides ? sp.; Etheridge Jr., p. 130, pl. 22, figs. 15–16.

1898 Phillipsia seminifera ; de Koninck, p. 276, pl. 24, figs. 9–9a.

1918 Phillipsia collinsi Mitchell ; p. 444, pl. 46, figs. 1–5, pl. 48, figs. 8–9, pl. 52, fig. 4. 1937 Phillipsia sp. 9 (cf. Phillipsia collinsi Mitchell ); Weber, p. 59, pl. 6, fig. 43. 1948 Linguaphillipsia ? collinsi ; Stubblefield, p. 98, 100.

1970 Weberiphillispia ( Linguaphillipsia ?) collinsi ; Osmólska, p. 48–49, 75. 1972 Weberiphillipsia collinsi ; Hahn & Hahn, p. 378.

1978 Weberiphillipsia ( Linguaphillipsia ?) collinsi ; Kobayashi & Hamada, p. 96, tab.1. 1983 Weberiphillipsia collinsi ; Engel & Morris, p. 238–241, figs. 1D, 11, 12A–N. 1983 Weberiphillipsia girvanensis Engel & Morris; p. 241–244, figs. 1E, 13, 14A–E.

Lectotype. AMF28373 (internal mould of cranidium).

Paralectotype material. From NU L361: AMF27748 (external pygidium), AMF28374 (internal pygidium), AMF28375 (internal pygidium), AMF28376 (internal pygidium), AMF28382 (internal dorsal shield). From NU L8: AMF80367 (internal dorsal shield), AMF80368 (external dorsal shield), AMF80369 (external pygidium), AMF80370 (external pygidium), AMF80371 (internal cranidium), AMF80372b (external cranidium), AMF80373 (internal pygidium), AMF80374 (internal pygidium), AMF80395 (external pygidium), AMF80396 (external pygidium), AMF80397 (partial external pygidium). From NU L538: AMF80375 (external pygidium), AMF80376 (internal pygidium), AMF80377 (internal cranidium), AMF80378 (external pygidium), AMF80379 (internal pygidium), AMF80380 (external cranidium), AMF80382 (external pygidium), AMF80383 (external cranidium), AMF80384 (partial external cranidium), AMF80385 (partial external pygidium), AMF80386 (external cranidium), AMF80387 (partial external pygidium). From NU L585: AMF80388 (external pygidium), AMF80389 (external pygidium), AMF80390 (partial external pygidium), AMF80391 (partial internal pygidium), AMF80392 (internal pygidium), AMF80393 (external pygidium). From NU L404: AMF80394 (partial internal pygidium).

Localities. Type—NU L361. Others—NU L8, NU L404, NU L538, NU L585.

Emended diagnosis. Cephalon parabolic; glabella long, densely nodose, considerably wider posteriorly to the medial constriction; greatest height in the centre of the glabella; palpebral lobes wide, raised laterally; genal spines short and pointed. Pygidium with 13–14 axial rings, 9–10 pleural ribs; border wide with distinct furrow; anterior ribs pass onto border as one or two nodes or spines; alignment of nodes with ribs diminishes posteriorly; outer area of border smooth; axial rings and ribs highly nodose.

Remarks. Weberiphillipsia girvanensis Engel & Morris 1983 has been synonymised with Palaeophillipsia collinsi . The specimens of W. girvanensis show a highly nodose pygidium and cephalon, a very wide posterior section of the glabella, a row, sometimes two, of nodes on the pygidial border, with an outer smooth margin, and a parabolic cephalon. These characteristics are identical to specimens of P. collinsi .