Pilosisporites parvispinosus Cookson and Dettmann, 1958

Seegets-Villiers, Doris E., 2016, Morphological variation of stratigraphically important species in the genus Pilosisporites Delcourt & Sprumont, 1955 in the Gippsland Basin, southeastern Australia, Memoirs of Museum Victoria 74, pp. 81-91 : 88

Pilosisporites parvispinosus Cookson and Dettmann, 1958

Figure 5E, G, H

Synonymy 1958 Pilosisporites notensis Cookson and Dettmann , p. 102, pl. XV fig. 2

1963 Pilosisporites parvispinosus Dettmann , p. 38, pl. IV figs. 6–8; p. 33 fig 4F

1980 Pilosisporites parvispinosus Dettmann ; Burger, p. 52, pl. 5 fig 9; pl. 6 figs 1–3

non 2012 Pilosisporites parvispinosus Dettmann ; Lebedeva and Pestchevitskaya, pl. 1 fig. 7

2012 Pilosisporites parvispinosus Dettmann ; Wagstaff et al., pl. II fig. 7

Diagnosis: see Dettmann (1963).

Size: Equatorial diameter 78 (85) 106 µm (11 specimens).

Remarks: Representatives of this species usually conform to the diagnosis by Dettmann (1963), but show, in rare cases, a slightly thicker exine (2–3.5 µm compared to Dettmann’s (1963) 2–3 µm). The spinulate sculpture occasionally has spinules with a wider base diameter (1–2 µm) compared to Dettmann’s 1 µm) and a sculpture height of (1–2.5 µm). Rarely present are longer apical sculptural elements.

Distribution (this study): Upper part of the Foraminisporis wonthaggiensis Zone to Coptospora paradoxa Zone , specifically the lower part of the Pilosisporites grandis subzone.