The Arman’ Flora includes the following taxa (determined by Samylina, Shchepetov, and Herman):
Hepaticopsida (Marchantiopsida):
Thallites ex gr. jimboi (Krysht.) Harris
Equisetopsida:
Equisetites sp.
Polypodiopsida:
Osmunda tapensis Samyl., Gleichenia rinkiana Heer, G. cf. lineariformis Krysht., Birisia ochotica Samyl., Tchaunia elongata Samyl. et Philipp., Adiantopteris lepiskensis Kiritchk., Arctopteris sp., Asplenium dicksonianum Heer, A. cf. popovii Samyl., Hausmannia bipartita Samyl. et Shczep., Acrostichopteris longifolia (Font.) Berry, Cladophlebis cf. virginensis Font., Cladophlebis sp. 1–2, Lobifolia holttumi (Sew.) Rasskaz. et E. Lebed., Sphenopteris sp.
Caytoniales:
Sagenopteris aff. variabilis (Vel.) Vel.
Cycadales:
Nilssonia pilifera Samyl.; Cycadophyta insertae sedis: Pterophyllum sp.
Ginkgoales:
Ginkgo ex gr. adiantoides (Ung.) Heer,
G. ex gr. sibirica Heer, Sphenobaiera cf. vera Samyl. et Shczep.
Leptostrobales:
Czekanowskia ex gr. rigida Heer, Phoenicopsis ex gr. angustifolia Heer, Leptostrobus marginatus Samyl.
Pinales:
Podozamites ex gr. lanceolatus (Lindl. et Hutt.) F. Braun, P. ex gr. eichwaldii Schimp., P. ex gr. reinii Geyl., P. ex gr. gracilis Vassilevsk., Pagiophyllum parvum Samyl. et Shczep., P. triangulare Pryn., Libocedrus arctica Sveshn. et Budants., Cupressospermum boreale Samyl., Geinitzia ex gr. reichenbachii (Gein.) Sew., Torreya gracillima (Holl.) Krysht. et Baik., Cephalotaxopsis ex gr. heterophylla Holl., C. ex gr. intermedia Holl., C. ex gr. successiva Holl., Pityophyllum latifolium Tur.-Ket., P. ex gr. nordenskioldii (Heer) Nath., P. ex gr. staratschinii (Heer) Nath., Pityospermum cf. piniformis Samyl., Pityostrobus sp., Sequoia armanensis Samyl. et Shczep., S. minuta Sveshn., S. ochotica Samyl. et Shczep., Sequoia sp., Elatocladus ex gr. smittiana (Heer) Sew., E. ex gr. subulata (Heer) Sew.
Pinophyta insertae sedis:
Desmiophyllum magnum (Samyl.) Samyl., Desmiophyllum sp.
Magnoliales:
Araliaephyllum montanum Philippova, A. ex gr. parvidens (Hollick) Philippova, A. subitum Philippova, Araliaephyllum sp. 1⎯2, Magnoliaephyllum sp., Myrtophyllum acuminatum (Philippova) Herman, Scheffleraephyllum venustum (Philippova) Philippova, Cissites bidentatus (Philippova) Herman, C. cordatus Philippova, Menispermites ex gr. septentrionalis Hollick, M. sibiricus (Heer) Golovneva, Brasenites sp., Terechovia intermedia Philippova, Trochodendroides armanensis Philippova, Trochodendroides sp. 1, Trochodendroides (?) sp. 2, Ziziphoides microphylla (Philippova) Herman, Z. smilacifolia (Budantsev) Budantsev, Arthollia pacifica Herman, Paraprotophyllum cf. cordatum (Samylina) Samylina, Ettingshausenia louravetlanica (Herman et Shczepetov) Herman, Pseudoprotophyllum boreale Hollick, Celastrophyllum orientalis Philippova, C. latifolium Fontaine, Dalembia pergamentii Herman et Lebedev, Dalbergites sp., Leguminosites sp., Dicotylophyllum sp.
The composition of the Arman flora is unusual. It consists of a peculiar combination of Early and Late Cretaceous taxa (Samylina, 1974; 1976; 1988). Dominants of the Arman’ Flora include typical Early Cretaceous and even Jurassic forms (four Podozamites species and Birisia ochotica close to the Early Cretaceous B. alata) associated with plants widespread in the Late Cretaceous floras (Cephalotaxopsis and Sequoia).
Among the subordinate taxa relictual Early Cretaceous forms are found that are common in Albian deposits of Northeast Asia and North America. These are Asplenium popovii, Acrostichopteris longifolia, Cladophlebis cf. virginensis, Lobifolia holttumi, Ginkgo ex gr. sibirica, Czekanowskia ex gr. rigida, Phoenicopsis ex gr. angustifolia, Leptostrobus marginatus, Sagenopteris aff. variabilis, Pagiophyllum triangulare, Celastrophyllum latifolium, and others.
The Arman’ Flora is also rich in plants typical of the Late Cretaceous floras. In addition to conifers Cephalotaxopsis and Sequoia mentioned above, Gleichenia rinkiana and a large group of angiosperms are worthy of particular note. Especially remarkable among the angiosperms are lobed leaves Araliaephyllum, platanoids Arthollia, Paraprotophyllum, Ettingshausenia and Pseudoprotophyllum, two or three Trochodendroides species, the compound leaved Scheffleraephyllum and Dalembia, and remains of presumably aquatic plants known as Brasenites.
|
|
|
