Watsoniocladus V.Sriniv.

Plant Fossil Names Registry Number: PFN002402

Act LSID: urn:lsid:plantfossilnames.org:act:2402

Author: V. Srinivasan

Rank: genus

Reference: Srinivasan, V. (1995): Conifers from the Puddledock locality (Potomac Group, Early Cretaceous) in eastern North America. – Review of Palaeobotany and Palynology 89(3–4): 257–286.

Page of description: 267


Original diagnosis/description

Coniferous trees or shrubs with leaves in opposite decussate pairs or whorls of three, with leaf bases separated by distinct sutures. Leaves scale-like, adpressed with scarious or fimbriate leaf margins and decurrent bases. Leaves amphistomatic or hypostomatic. Stomata distributed all over abaxial surface and bounded on the outside by a raised ring or flush with the surface. Papillae from the rim of the stomatal pit overarching the stomatal aperture or papillae present inside the pit; stomata mainly monocyclic to incompletely dicyclic. Outer epidermal cell surfaces with or without papillae and/or trichomes.


The generic name is in honour of Dr. Joan Watson who has contributed immensely to our knowledge of the extinct Mesozoic conifer family, the Cheirolepidiaceae.

Plant fossil remain

macro- and meso-fossils-embryophytes except wood

Names associated with genus

Watsoniocladus valdensis (Seward) V.Sriniv. 1995

Watsoniocladus cunhae J.Kvaček et M.M.Mendes 2021

Watsoniocladus crassirameus (Zheng Y.Cao) J.Kvaček et M.M.Mendes 2021

Watsoniocladus itieri (Saporta) J.Kvaček et M.M.Mendes 2021


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