CYCADOPSIDA sensu Ruggiero et al., 2015

Pole, Mike, 2019, Middle-Late Jurassic plant assemblages of the Catlins coast, New Zealand, Palaeontologia Electronica (a 51) 23 (3), pp. 1-48 : 14-15

Class CYCADOPSIDA sensu Ruggiero et al., 2015 Order BENNETTITALES Engler, 1892 and CYCADALES Persoon ex Berchtold and Presl, 1820

Remarks. Although they have broadly similar external foliage morphology the ‘cycadophytes’ were recognised as including two unrelated groups, the Bennettitales and Cycadales , once cuticular morphology was employed. This has clarified the position of various genera, but rather than come up with a parallel system for dealing with remains without cuticle, attention has also focussed on morphological characters to differentiate them. There are now several slightly different

PALAEO- ELECTRONICA.ORG approaches for this (Harris, 1969a; Person and Delevoryas, 1982; Gee, 1989, Watson and Sincock, 1992; Rees and Cleal, 2004). All include the leaflet base as an important character although Rees and Cleal (2004) emphasised venation as more reliable.