52 



J. WATSON, S.J. LYDON & N.A. HARRISON 



' 



M 



1 



^ -'.u;'- 



•G 



1 \ 

 1^ 







','■■' 





V' 





Fig. 19 A-F Ginkgoites garlickianus sp. nov. All lower cuticle. A, isodiametric ordinary epidermal cells and scattered stomata, V.64550, LM, x 125; B, 

 smooth outer surface of cuticle, V.64548, SEM, x 125; C, inside of cuticle showing stomatal distribution, holotype, V.64548. SEM. x 125; D, 2 stomata 

 showing circular outline and thickened rim, V.64551, LM, x 500; E, holotype, outer surface of cuticle showing single stoma with flattened subsidiary cell 

 papillae, V.64548, SEM, x 750; F, holotype, stoma viewed from inside, showing thickly cutinized semi-circular dorsal plates and inner anticlinal walls, 

 V.64548, SEM, x 750. 



|im long and 70 |jm wide at chalazal end, 85 \xm long and 30 |im wide 

 near beak. 



Pollen grains present within pollen chamber, elliptical, 50 \xm 

 long, monocolpate. 



Material and occurrence. V.64552, Fig. 20A-C, a compressed 

 ovule retrieved following maceration of an isolated leaf fragment of 

 Ginkgoites weathem'axiae, is the only specimen to have been found 

 at present. It is from the plant debris beds of Worbarrow Bay, Dorset. 



Wessex Formation; Hauterivian. 



Discussion. Interpretation of this structure, the only reproductive 

 body to have been associated with ginkgoalean material from the 

 English Wealden to date, is difficult, particularly as there is only a 

 single compressed specimen (Figs 20A-G; 21) available for study. 

 However, the general morphology (Fig. 20A-C) is clearly that of an 

 orthotropous gymnosperm ovule. 



The ovule was found in so close an association with a leaf 



