Archangelskya, Herbst emend. Rees and Cleal, 1993

Pole, Mike, 2019, Middle-Late Jurassic plant assemblages of the Catlins coast, New Zealand, Palaeontologia Electronica (a 51) 23 (3), pp. 1-48 : 20

Genus ARCHANGELSKYA Herbst emend. Rees and Cleal, 1993

Archangelskya furcata (Halle) Herbst emend. Rees and Cleal, 1993

Figure 12

1989 Archangelskya furcata (Halle) Herbst emend.

Rees and Cleal; Gee, fig. 38.

2004 Archangelskya furcata (Halle) Herbst emend.

Rees and Cleal; Rees and Cleal, pl. 22.

Material. Owaka: LX0672, LX0673.

Description. Frond bipinnate. Primary axis c. 2 mm diameter. Pinnules rhombic or almost fan-shaped attached by a narrow base. 8–11 mm long, 4–5 mm wide. Acroscopic basal margin contracted such that the basal, apical margin of the pinnule is more or less parallel to the axis, basiscopic basal margin decurrent, but not connecting to adjacent pinnule as a wing. Venation faint but appears to generally radiate from attachment.

Remarks. Two fragments from Owaka have the distinct pinnule shape of Archangelskya , and specifically with A. furcata (see Gee, 1989; Rees and Cleal, 2004; Parica et al., 2007). The pinnule shape is widely characterised as ‘polymorphic’.

Figures

FIGURE 12. Archangelskya furcata. 1. LX0672, Owaka; 2. LX0673, Owaka. All scale bars equal 10 mm.