Sphenopteris travisii

Pole, Mike, 2019, Middle-Late Jurassic plant assemblages of the Catlins coast, New Zealand, Palaeontologia Electronica (a 51) 23 (3), pp. 1-48 : 11

Sphenopteris travisii Stirling, 1900

Figure 6

1900 Sphenopteris travisii Stirling, p. 4, pl. 13, figs. 18, 19.

1917 Sphenopteris otagoensis Arber , pl. 1, figs. 5, 6, 8.

1917 Coniopteris hymenophylloides Arber , pl. 2, figs. 1, 2, 3.

1986 Sphenopteris travisii Stirling, Drinnan and Chambers, p. 29, figs. 15H.

2002 Sphenopteris travisii Stirling ex Drinnan and Chambers; McLoughlin et al. p. 26, fig. 15.

Material. Black Point : LX1144-1146, LX1185, LX1186, LX1189, Blue Cod Bay : LX0665, LX1180, LX1181, Curio Bay: LX1100, LX1247, Slope Point- 01: LX1138, Slope Point-03: LX2066, LX2067.

Description. Fronds sterile, pinnae c. 60 mm long, tapering gradually. Pinnules alternate, arising at an angle of 40–40°, 3–12 mm long, 1.2–4.7 mm wide, with two to three lobes on each side, tooth-like, with sharp apices, and separated by sharp sinuses. The acroscopic margin of pinnule is contracted, parallel to the pinna midrib. The basiscopic margin of each pinnule extends and narrows gradually toward its proximal neighbour forming a slight wing. Pinnule main vein decurrent on the main axis, with a zig-zag course within the pinnule and evanescing well before the pinnule apex.

Figures

FIGURE 6. Sphenopteris travisii. 1. LX2067, Slope-03; 2. LX1180, Blue Cod Bay; 3. LX665 Blue Cod Bay. All scale bars equal 10 mm.