Radula heinrichsii (Radulaceae, Porellales), a leafy liverwort from the mid-Cretaceous of Myanmar

Wang, Qiang; Li, Ya; Feldberg, Kathrin; Wang, Yongdong; Yang, Xiangdong

doi:10.1016/j.palwor.2022.01.006

Cited by 4 publications

(6 citation statements)

References 31 publications

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“…With the presence of microphyllous branches R. tikhomirovae greatly differs from other Radula species already described from European Eocene amber, because these species are not known to have such branches. The comparatively long microphyllous branches are found in R. heinrichsii described from the Cretaceous (Wang et al 2022); moreover, the latter species is also somewhat similar to R. tikhomirovae in the shape of leaf lobes and lobules. However, the leaf lobules in the former species were inserted longitudinally, whereas in R. tikhomirovae the leaf lobule insertion was subtransversely.…”

Section: Systematic Paleobotanymentioning

confidence: 82%

“…The modern representatives of Radula are normally corticolous or epiphyllous in humid, tropical or warmtemperate regions (Heinrichs et al 2016), but some species penetrate into cool climates where they live rocks, the ground, and the bark of trees (Schuster 1980). The genus has an ancient age: Its extinct members are known from the Cretaceous (Bechteler et al 2017;Wang et al 2022), and three extinct species (R. baltica Heinrichs, Schäf.-Verw. & M.A.M.Renner, R. oblongifolia Casp., and R. sphaerocarpoides Grolle) have been described from Eocene Baltic and Bitterfeld amber (Grolle & Meister 2004;Heinrichs et al 2016).…”

Section: Introductionmentioning

confidence: 99%

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Hepatics from Rovno amber (Ukraine). 11. Radula oblongifolia and R. tikhomirovae sp. nov.

Mamontov,

Ignatov,

Vasilenko

et al. 2024

Ecol. Monten.

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A study of Rovno amber has revealed two fossil leafy liverwort species of the genus Radula (Radulaceae, Marchantiophyta) that are new to the late Eocene flora of Rovno amber. One of these species, R. oblongifolia, was described previously from Eocene Baltic and Bitterfeld amber, whereas the other species, R. tikhomirovae, is described here as new. Radula tikhomirovae differs from R. oblongifolia and two other Eocene species of that genus, R. sphaerocarpoides and R. baltica, by the presence of microphyllous branches and by the shape of its leaf lobules.

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Section: Systematic Paleobotanymentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Hepatics from Rovno amber (Ukraine). 11. Radula oblongifolia and R. tikhomirovae sp. nov.

Mamontov,

Ignatov,

Vasilenko

et al. 2024

Ecol. Monten.

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“…The mid-Cretaceous Kachin amber forest was highly tropical and probably located close to the seashore [ 32 , 37 , 38 ]. It was rich in epiphytes that are known to be mainly composed of Porellalean leafy liverworts [ 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 ] and Dicranalean and Hypnodendralean mosses [ 66 , 67 , 68 , 69 , 70 ]. The discovery of T .…”

Section: Discussionmentioning

confidence: 99%

First Fossil Record of Trichomanes sensu lato (Hymenophyllaceae) from the Mid-Cretaceous Kachin Amber, Myanmar

Ebihara

Nosova

et al. 2023

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Hymenophyllaceae (filmy ferns), with ca. 430 species, are the most species-rich family of early diverging leptosporangiate ferns but have a poor fossil record dating back to the Late Triassic period. Traditionally, Hymenophyllaceae comprise two species-rich genera or clades: Hymenophyllum (hymenophylloids) and Trichomanes sensu lato (s.l.) (trichomanoids). Unequivocal fossils of Hymenophyllum have been reported from the Early Cretaceous of central Mongolia and the early Eocene of Okanogan Highlands, Washington, USA. However, despite being a highly diversified lineage with an estimated 184 extant species, Trichomanes s.l. lack a definitive fossil record, which severely affects the reliability of the molecular dating of this group. Here, we report the first unequivocal fossil record of Trichomanes s.l. as T. angustum comb. nov. on the basis of fertile material with tubular involucres and long exserted receptacles from the mid-Cretaceous Kachin amber, Myanmar. This species was previously tentatively assigned to Hymenophyllites due to a lack of fertile evidence. Inferred to be an epiphytic fern, T. angustum further enriches the species diversity of the epiphytic palaeocommunities in the mid-Cretaceous Kachin amber, which are mainly composed of Porellalean leafy liverworts and Dicranalean and Hypnodendralean mosses. Fossil records indicate that Hymenophyllaceae probably originated in the tropical Pangea at the latest in the Triassic when all continents were coalesced into a single landmass and had already accumulated some notable diversity in low-middle latitude areas of Laurasia by the mid-Cretaceous period.

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“…Here, we present new holomorphic specimens of Protospinax annectans and revise the skeletal morphology of this taxon within a molecular framework by applying a molecular backbone constraint. Molecular backbone constraints have been used previously to incorporate fossils within a molecular hypothesis in a number of different groups (e.g., snakes [ 63 ], turtles [ 64 ], old world monkeys [ 65 ], and leafy liverwort [ 66 ]), but this has never been performed before on cartilaginous fish. By applying this method, we aim to identify unambiguous synapomorphies within the Elasmobranchii, discuss previously proposed morphological characters and character evolution in the light of molecular evidence, and try to decipher the phylogenetic position of the enigmatic Late Jurassic elasmobranch Protospinax annectans .…”

Section: Introductionmentioning

confidence: 99%

Systematics and Phylogenetic Interrelationships of the Enigmatic Late Jurassic Shark Protospinax annectans Woodward, 1918 with Comments on the Shark–Ray Sister Group Relationship

et al. 2023

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The Late Jurassic elasmobranch Protospinax annectans is often regarded as a key species to our understanding of crown group elasmobranch interrelationships and the evolutionary history of this group. However, since its first description more than 100 years ago, its phylogenetic position within the Elasmobranchii (sharks and rays) has proven controversial, and a closer relationship between Protospinax and each of the posited superorders (Batomorphii, Squalomorphii, and Galeomorphii) has been proposed over the time. Here we revise this controversial taxon based on new holomorphic specimens from the Late Jurassic Konservat-Lagerstätte of the Solnhofen Archipelago in Bavaria (Germany) and review its skeletal morphology, systematics, and phylogenetic interrelationships. A data matrix with 224 morphological characters was compiled and analyzed under a molecular backbone constraint. Our results indicate a close relationship between Protospinax, angel sharks (Squatiniformes), and saw sharks (Pristiophoriformes). However, the revision of our morphological data matrix within a molecular framework highlights the lack of morphological characters defining certain groups, especially sharks of the order Squaliformes, hampering the phylogenetic resolution of Protospinax annectans with certainty. Furthermore, the monophyly of modern sharks retrieved by molecular studies is only weakly supported by morphological data, stressing the need for more characters to align morphological and molecular studies in the future.

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Radula heinrichsii (Radulaceae, Porellales), a leafy liverwort from the mid-Cretaceous of Myanmar

Cited by 4 publications

References 31 publications

Hepatics from Rovno amber (Ukraine). 11. Radula oblongifolia and R. tikhomirovae sp. nov.

Hepatics from Rovno amber (Ukraine). 11. Radula oblongifolia and R. tikhomirovae sp. nov.

First Fossil Record of Trichomanes sensu lato (Hymenophyllaceae) from the Mid-Cretaceous Kachin Amber, Myanmar

Systematics and Phylogenetic Interrelationships of the Enigmatic Late Jurassic Shark Protospinax annectans Woodward, 1918 with Comments on the Shark–Ray Sister Group Relationship

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