40 



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



discussed. The disadvantage of this usage has recently been illustrated 

 by Zhou & Zhang (1992) with their discovery of ginkgoalean 

 ovuliferous organs so different from those of G. hiloba as to require 

 the erection of a new genus Yimaia Zhou & Zhang ( 1992). Following 

 Zhou (1997), Watson et a! (1999) readopted Ginkgoites Seward as a 

 form- or organ-genus in the redescription of the leaf species 

 Ginkgoites braiiniana (Danker) Watson et al and Ginkgoites 

 pliiripartita (Schimper) Seward, from the Lower Cretaceous Wealden 

 facies of Germany. This usage seems to us even more relevant to the 



naming of the extremely fragmentary material described below as 

 three new species of Ginkgoites Seward. 



Ginkgoites weatherwaxiae sp. nov. 



Figs 7-11 



1976 29 Gink GkC Oldham (Code used instead of Linnean 

 binomial): 462, pi. 69, figs 7, 8; pi. 70, figs 1, 2. 



Diagnosis, [based on leaf fragments only] Leaf petiole 0.5 mm 

 wide, expanding into lamina deeply divided into primary segments. 





#" ^- 1 



1^" 



W B 



\pM 



Fig. 7A-H Ginkgoites weatherwaxiae s.p. nov. A, leaf segment with rounded apex and numerous resin bodies. V.64528, LM. x 15; B, large leaf segment 

 with mucronate apex, V.64529, LM, x 10; C, holotype, branched leaf fragment showing two dichotomies, with numerous resin bodies, particularly along 

 left margin. V.64530, LM, x 10; D, forked apex of branched leaf fragment with pointed growing tips, V.64531, LM, x 20; E, unbroken mucronate apex, 

 V.64532, SEM, x 50; F, apex of leaf segment in Fig. B with broken mucronate tip, V.64529, LM, x 50; G, leaf segment showing bite which has pierced 

 both surfaces, V.64533, LM, x 25; H, edge of bite in Fig. G showing evidence of reaction after damage, V.64533, LM, x 100. 



