Calymperites burmensis Heinrichs, Schaef .-Verw., Hedenaes , Ignatov & A.R.Schmidt

Feldberg, Kathrin, Schaefer-Verwimp, Alfons, Li, Ya & Renner, Matt A. M., 2022, Extending the diversity of the bryoflora in Kachin amber (Myanmar), with the description of Radula patrickmuelleri, sp. nov. and R. tanaiensis, sp. nov. (Jungermanniopsida, Porellales, Radulaceae), Fossil Record 25 (1), pp. 213-230 : 213

Calymperites burmensis Heinrichs, Schaef.-Verw., Hedenaes, Ignatov & A.R.Schmidt

Calymperites burmensis Heinrichs, Schäf.-Verw., Hedenäs, Ignatov & A. R. Schmidt; in Cretaceous Research 51: 261, figs 1, 2. 2014.

Holotype.

AMNH Bu ASJH-2, Amber collection of the Division of Invertebrate Zoology of the American Museum of Natural History, New York, USA.

Additional specimens investigated.

BuB4339, BuB4398, Patrick Müller Amber Collection.

Locality and horizon.

Amber mines southwest of the village of Tanai ca. 105 km north of Myitkyina in Kachin State, northern Myanmar, fossil enclosed in upper Albian-lower Cenomanian Kachin amber.

Remarks.

To date, this acrocarpous moss was only known from one specimen (Suppl. material 1: Fig. S1A; Heinrichs et al. 2014). As far as the disintegrated state of the new fossils allows to ascertain, they are in good accordance with the type. In both specimens the leaves are erect-spreading and slightly crisped, their bases are oblong-ovate and sheathing the stem before they taper into lanceolate upper regions, and the costa is single and excurrent on intact leaves (Suppl. material 1: Fig. S1B-D). The apices are acute to awned in BuB4398 (Suppl. material 1: Fig. S1B), while they are mostly broken in BuB4339 (Suppl. material 1: Fig. S1C, D). It is not visible if the leaves are serrulate, or if large hyaline cells are present near the apex. Furthermore, the leaf cells are not clearly visible for the largest part, but they appear to be small and quadrate on upper parts of the lamina (Suppl. material 1: Fig. S1D) and more elongated on lower parts (Suppl. material 1: Fig. S1B).

Phylum MARCHANTIOPHYTA

Class JUNGERMANNIOPSIDA

Subclass JUNGERMANNIIDAE

Order PORELLALES

Family FRULLANIACEAE

Genus Frullania