Upper Jurassic mosses from Baigul (Transbaikalia, South Siberia)

Ignatov, Michael S.; Karasev, E. V.; Sinitsa, Sofia M.

doi:10.15298/arctoa.20.03

Cited by 19 publications

(13 citation statements)

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“…B. ingodensis (Srebrod.) Ignatov, Transbaikalia, Ingoda & Baigul (Srebrodolskaya, ; Ignatov, ; Ignatov et al, ), Upper Jurassic or Lower Cretaceous.…”

Section: Resultsmentioning

confidence: 99%

How to rely on the unreliable: Examples from Mesozoic bryophytes of Transbaikalia

Mamontov

Ignatov

2019

J of Sytematics Evolution

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Three new fossil bryophytes are described from Jurassic and Lower Cretaceous deposits of the Transbaikalia region of Russia. The complex thalloid hepatic Khasurtythallus monosolenioides gen. et sp. nov. belongs to the Marchantiidae, but its combination of characters precludes unequivocal placement in any of the five orders of this subclass, representing most likely an extinct lineage. Paleaethallus squarrosus gen. et sp. nov. is a thalloid plant with scales similar to those of complex thalloid hepatics, although their arrangement and the overall plant structure has little in common with any extant hepatics. Dispersed moss capsules, three of which have attached calyptrae, are described as a form genus Kulindobryum gen. nov. Despite incomplete preservation, some rare characters indicate possible relationship to the genus Tayloria of the Splachnaceae, an extant family of mosses adapted to grow on animal dung, dead bodies and bones. Notably, Kulindobryum co‐occurs with bones of the small feathered dinosaurs Kulindadromeus, which also supports an affiliation of Kulindobryum with the Splachnaceae. The most common and best known Mesozoic moss for the region, the genus Bryokhutuliinia, is appraised for its systematic position and probable affinities with the Dicranales. A scoring approach is introduced for the comparative method of taxonomic placement of fossils with partial suites of morphological characters at the family or order level.

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“…B. ingodensis (Srebrod.) Ignatov, Transbaikalia, Ingoda & Baigul (Srebrodolskaya, ; Ignatov, ; Ignatov et al, ), Upper Jurassic or Lower Cretaceous.…”

Section: Resultsmentioning

confidence: 99%

How to rely on the unreliable: Examples from Mesozoic bryophytes of Transbaikalia

Mamontov

Ignatov

2019

J of Sytematics Evolution

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“…These effects appear essentially similar to those associated with the precipitation of iron‐ and manganese‐oxides in recently described bryophyte fossils from Jurassic–Cretaceous deposits of the Russian Far East (see Ignatov & Shcherbakov ; Ignatov et al . ).…”

Section: Discussionmentioning

confidence: 97%

Diverse bryophyte mesofossils from the Triassic of Antarctica

Bomfleur

Klymiuk

Taylor

et al. 2014

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Compared with the fossil record of vascular plants, bryophyte fossils are rare; this circumstance is probably related to a lower preservation potential compared with that of vascular plants. We searched for bryophyte remains in extensive collections of plant‐fossil assemblages from the Triassic of Antarctica and identified three assemblages with surprisingly well‐preserved bryophyte fossils. Although most bryophyte remains are too fragmented to conclusively place them in a detailed systematic context, they exhibit features sufficient to suggest the presence of at least four types of leafy bryophytes and two orders of thallose liverworts (Pallaviciniales and Metzgeriales) in the high‐latitude Triassic ecosystems of Antarctica. The leafy bryophytes exhibit combinations of morphological features (e.g. keeled and entire‐margined, ecostate leaves with elongated cells) that today occur in only a few small, systematically isolated groups, but were common among Palaeozoic and especially Mesozoic bryophytes. The diverse morphologies of the bryophyte fossils add further support to previous hypotheses that during warmer periods in the Earth's history, bryophyte vegetation may have been particularly rich and diverse in high‐latitude regions. Through analysis of the sedimentology and taphonomy of these assemblages, we identify a combination of key factors that may explain the preservation of bryophyte fossils in these deposits: (1) punctuated, high‐energetic sedimentary events causing traumatic removal and incorporation of bryophytes into sediment‐laden flood waters; (2) limited transport distance, and short period of suspension, followed by rapid settling and burial as a result of a rapidly decelerating flow discharging into a floodplain environment; and (3) early‐diagenetic cementation with iron hydroxides in locally anoxic zones of the organic‐rich, muddy substrate.

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“…The previously suggested (Ignatov et al, 2011) possible relationship with Hookeriales remains poor, although small cap-sules are a characterisitc of these large plants.…”

Section: MM New Bryokhutuliinia Species With Sporophytes From Thmentioning

confidence: 87%

“…The moss speci-INTRODUCTION A considerable number of Upper Jurassic and Lower Cretaceous bryophytes have been recognized in several localities of the Transbaikal region of Siberia, Amur River Basin in Russian Far East and Mongolia; these include Umalta-Makit, a Bureya River tributary (Krassilov, 1973), Ingoda and Samkhak (Srebrodolskaya, 1980), ErdeniUla (Krassilov, 1982), Khutuliin-Khara (Ignatov, 1992), Unda and Daya (Ignatov & Shcherbakov, 2007), Baigul (Ignatov et al, 2011), and Khasurty (Ignatov & Shcherbakov, 2011).…”

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confidence: 99%

“…The most widespread and abundantly represented genus in these collections is Bryokhutuliinia, which so far includes three species (Srebrodolskaya, 1980;Ignatov, 1992;Ignatov & Shcherbakov, 2011;Ignatov et al, 2011). This genus is usually easy to recognize by its relatively large, 3-6 mm long, lanceolate to ovate-oblong leaves, spreading from the stem at an angle close to 90°a nd being often shallowly reflexed, ecostate and with a distinct dark border all around the margin.…”

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New Bryokhutuliinia species (Bryophyta) with sporophytes from the Upper Jurassic of Transbaikalia

Ignatov

Karasev

Sinitsa

et al. 2013

Arctoa, a jornal of bryology

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A new species of the moss genus Bryokhutuliinia, B. crassimarginata is described from the Upper Jurassic deposits from the Olov, Transbaikal Area of South Siberia. Its excellent preservation demonstrates that the leaves were not only complanate, but truly distichous. In addition to anatomically preserved gametophytes, sporophytes on short lateral branches were found, although carbonized and not exhibiting structural details. Possible relationships with pleurocarpous mosses and with Fissidentaceae are discussed. РезюмеИз верхнеюрских отложений местонахождения Олов (Забайкальский край, Чернышевский район) описан новый вид мха из рода Bryokhutuliinia, B. crassimarginata. Превосходная сохран-ность, позволяющая видеть детали анатомии этого растения, позволила уточнить структурные особенности данного рода, в частности, его листорасположение, которое было не просто упло-щенным, но истинно двурядным, что является редким признаком и у современных мхов, известным лишь у 5 родов. Помимо гаметофита, в коллекции представлены остатки коробочек на верхушках коротких латеральных побегов, однако сохранность образцов не позволяет видеть детали их строения. Приводится сравнение с современными бокоплодными мхами и Fissidentaceae.

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Upper Jurassic mosses from Baigul (Transbaikalia, South Siberia)

Cited by 19 publications

References 2 publications

How to rely on the unreliable: Examples from Mesozoic bryophytes of Transbaikalia

How to rely on the unreliable: Examples from Mesozoic bryophytes of Transbaikalia

Diverse bryophyte mesofossils from the Triassic of Antarctica

New Bryokhutuliinia species (Bryophyta) with sporophytes from the Upper Jurassic of Transbaikalia

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