Selaginella cretacea

Name

Selaginella cretacea

Rank

Species

Generic Name

[Genus] Selaginella

Authors (Name)

Li Y. Schneider H. Wang Y.-D.  

Authors (Pub.)

Li Y. Li Y.-D. Wang Y.-D. Schneider H. Shi G.-L.  

Publication

Re-appraisal of lacewing mimicry of liverworts from the mid-Cretaceous Kachin amber, Myanmar with a description of Selaginella cretacea sp. nov. (Selaginellales, Selaginellaceae) [2022/1]

Journal

Cretaceous Research

Volume

133

Issue

105143

Page number

3

Year

2022

Fossil Status

leafy twigs (with reproductive organs)

Stratigraphy

Cenomanian

Strat. comment

in upper Albian-lower Cenomanian Kachin amber

Location

Amber mines southwest of the village of Tanai ca. 105 km north of Myitkyina, Kachin State, northern Myanmar

Paleoregion

Eurasia (Indochina)

Data for Holotypus

Repository

Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing, China

Repository Number

PB22713

Num

Figs. 1E-G, 2A-H

Pub.

Re-appraisal of lacewing mimicry of liverworts from the mid-Cretaceous Kachin amber, Myanmar with a description of Selaginella cretacea sp. nov. (Selaginellales, Selaginellaceae) [2022/1]

Diagnosis

Shoot anisotomously branched. Vegetative leaves dimorphic, arranged in 4 ranks, 2 ranks of smaller ascending median leaves, and other 2 ranks of larger spreading lateral leaves. Median leaves 0.6-1.0 mm long and 0.2-0.3 mm wide, with acuminate to aristate apices and dentate to serrate margin. Lateral leaves 0.9-1.6 mm long and 0.3-0.7 mm wide, with acute apices, non-auriculate bases, serrulate to serrate margin, and punctate surface. Strobili born at apex of the fertile shoots, compact, dorsiventrally complanate, 2.9e3.2 mm long and 1.4e1.6 mm wide. Sporophylls arranged in 4 ranks, dimorphic, resupinate with dorsal sporophylls larger than ventral ones. Dorsal sporophylls ca. 14 per strobilus, 0.8-1.2mm long and 0.3-0.5mm wide, with acute apices and serrulate to serrate margin and punctate surface, without keel and sporophyll-pteryx. Ventral sporophylls ca. 12-13 per strobilus, 0.5-0.9mm long and 0.3-0.5 mm wide, with acuminate apices and dentate to serrate margin.