Classostrobus archangelskyi

Name

Classostrobus archangelskyi

Rank

Species

Generic Name

[Genus] Classostrobus

Authors (Pub.)

Kvaček J. Mendes M. M. Tekleva M. V.  

Publication

A new cheirolepidiaceous microsporangiate cone Classostrobus archangelskyi with in situ pollen from the Lower Cretaceous of Figueira da Foz Formation, central-western mainland Portugal [2023/7]

Journal

Review of Palaeobotany and Palynology

Volume

317

Issue

104951

Page number

3

Year

2023

Fossil Status

fructification (male)

Stratigraphy

Aptian

Strat. comment

Famalicão Member of the Figueira da Foz Formation

Location

Carregueira opencast clay pit complex, near village of Juncal, Lusitanian Basin, western-central mainland Portugal (39◦ 35′ 24.9″ N; 08◦ 55′ 33.1″ W)

Paleoregion

Eurasia (Europe)

Data for Holotypus

Repository

Museu Geológico, Laboratório Nacional de Energia e Geologia, Lisboa, Portugal

Repository Number

P1124 (Juncal sample 414)

Num

Plates I–VII

Pub.

A new cheirolepidiaceous microsporangiate cone Classostrobus archangelskyi with in situ pollen from the Lower Cretaceous of Figueira da Foz Formation, central-western mainland Portugal [2023/7]

Diagnosis

Microsporangiate cone ovoid in shape, consisting of about 12 peltate, imbricated microsporophylls of deltoid shape; each sporophyll consisting of stalk and microsporophyll head with obtuse apex, margin bearing long unicellular trichomes; each bearing abaxially 4–5 ovoid pollen sacs. Pollen sacs bearing Classopollis type pollen. Abaxial cuticle of microsporophyll bear rows of stomatal apparati, surrounded by (3)–4 subsidiary cells, sometimes with small papillae. Pollen of Classopollis type spheroidal, with equatorial girdle, subequatorial rimula, proximal trilete scar, and distal cryptopore.