Cooksonia caledonica D.Edwards

Plant Fossil Names Registry Number: PFN000858


Author: D. Edwards

Rank: species


Reference: Edwards, D. (1970): Fertile Rhyniophytina from the Lower Devonian of Britain. – Palaeontology 13(3): 84–87., link

Page of description: 457

Illustrations or figures: pl. 87, figs 1–10

Name is type for

Aberlemnia Gonez et Gerrienne 2010

Other combinations

Aberlemnia caledonica (D.Edwards) Gonez et Gerrienne 2010


Holotype R.S.M. 1967.30.2P and C, Royal Scottish Museum, Edinburgh, United Kingdom
Figures: pl. 87, figs 1–10

Original diagnosis/description

Incomplete plant at least 6·7 cm. high. Naked dichotomously branching axes 0·4–1·8 mm. wide {average 0·65 mm.). Term inal spherical to oval sporangia, some also reniform. Border (0·1–0·2 mm. wide) sometimes present. Globose sporangia 1·2–2·0 mm. high (average 1·7 mm.) by 1·3–2·2 mm. wide (average 1·8 mm.). Oval ones 1·1– 1·8 mm. high (average 1·6 mm.) by 1·8–3·0 mm. wide (average 2·4 mm.). Axis widens slightly below sporangium.

Emended diagnosis

Gonez et Gerrienne (2010: Rev. Palaeobot. Palynol., 163: 71):
axes 0.4–1.8 mm wide (x̄ = 0.65 mm), branches length decreasing distally. Distalmost axis segment 1.4–4.4 mm long (x̄ = 3 mm) and 0.4–0.9 mm wide (x̄ = 0.62 mm). Circular sporangia 1.2–2 mm high (x̄ = 1.7 mm) and 1.3–2.2 mm wide (x̄ = 1.8 mm). Oval and reniform sporangia 1.1–1.8 mm high (x̄ = 1.6 mm) and 1.8–3 mm wide (x̄ = 2.4 mm). Sporangial border 0.14–0.35 mm wide.


Devonian, Lower Devonian
Cairnconnan Group, Dittonian Stage Lower Old Red Sandstone of Scotland


United Kingdom
Aberlemno Quarry, Aberlemno, approximately 1½ miles north-north-west of Turin Hill, Angus; Nat. Grid Ref. 527551

Plant fossil remain

macro- and meso-fossils-embryophytes except wood


Use comments to notify PFNR administrators of mistakes or incomplete information relevant to this record.