Palaeozoogeographical connections of the Devonian vertebrate communities of the Baltica Province. Part II. Late Devonian

Lukševičs, Ervīns; Lebedev, Oleg A.; Zakharenko, G.V.

doi:10.1016/j.palwor.2009.12.003

Cited by 20 publications

(2 citation statements)

References 23 publications

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“… Palaeogeographical map of the Main and Central Devonian fields during the late Frasnian, with study area indicated (modified after Lebedev et al. 2010).…”

Section: Regional and Geological Settingmentioning

confidence: 99%

Frasnian vertebrate taphonomy and sedimentology of macrofossil concentrations from the Langsēde Cliff, Latvia

Lukševičs

Ahlberg

Stinkulis

et al. 2012

LET

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Lukševičs, E., Ahlberg, P.E., Stinkulis, Ģ., Vasiļkova, J. & Zupiņš, I. 2011: Frasnian vertebrate taphonomy and sedimentology of macrofossil concentrations from the Langsēde Cliff, Latvia. Lethaia, Vol. 45, pp. 356–370. The siliciclastic sequence of the Upper Devonian of Kurzeme, Western Latvia, is renowned for abundant vertebrate fossils, including the stem tetrapods Obruchevichthys gracilis and Ventastega curonica. During the first detailed taphonomic study of the vertebrate assemblage from the Ogre Formation cropping out at the Langsēde Cliff, Imula River, abundant vertebrate remains have been examined and identified as belonging to one psammosteid, two acanthodian and three sarcopterygian genera; the placoderm Bothriolepis maxima dominates the assemblage. Besides fully disarticulated placoderm and psammosteid plates, separate sarcopterygian scales and teeth, and acanthodian spines, partly articulated specimens including complete distal segments of Bothriolepis pectoral fins, Bothriolepis head shields and sarcopterygian lower jaws have been found. The size distribution of the placoderm bones demonstrates that the individuals within the assemblage are of approximately uniform age. Distinct zones have been traced within the horizontal distribution of the bones. These linear zones are almost perpendicular to the dominant dip azimuth of the cross‐beds and ripple‐laminae and most probably correspond to the depressions between subaqueous dunes. Concavity ratio varies significantly within the excavation area. The degree of fragmentation of the bones and disarticulation of the skeletons suggest that the carcasses were reworked and slightly transported before burial. Sedimentological data suggest deposition in a shallow marine environment under the influence of rapid currents. The fossiliferous bed consists of a basal bone conglomerate covered by a cross‐stratified sandstone with mud drapes, which is in turn overlain by ripple laminated sandstone, indicating the bones were buried by the gradual infilling of a tidal channel. All the Middle–Upper Devonian vertebrate bone‐beds from Latvia are associated with sandy to clayey deposits and have been formed in a sea‐coastal zone during rapid sedimentation episodes, but differ in fossil abundance and degree of preservation. □Agnathans, Devonian, facies analysis, fish, fossil assemblage, palaeoenvironment.

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“… Palaeogeographical map of the Main and Central Devonian fields during the late Frasnian, with study area indicated (modified after Lebedev et al. 2010).…”

Section: Regional and Geological Settingmentioning

confidence: 99%

Frasnian vertebrate taphonomy and sedimentology of macrofossil concentrations from the Langsēde Cliff, Latvia

Lukševičs

Ahlberg

Stinkulis

et al. 2012

LET

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“…n.,” p. 269) from the Khovanshchina Formation (Famennian) at the Andeyevka-2 (=ANE-1) locality in the Tula Region of Central Russia. The potential presence of Eusthenodon in the Khovanschina Formation has been communicated through original reporting and citations in the subsequent decades (see also Lebedev & Clack, 1993; Alekseev et al, 1994; Clément, 2002; Lebedev et al, 2009, 2010, 2018). The most recent and complete of the original reports (Lebedev et al, 2018) finds evidence of Eusthenodon at four localities (Andreyevka-2 [ANE-1], Draguny quarry, Gorbachevo quarry, and Mikhailovskoye quarry) and infers at least one new species among the material.…”

Section: Discussionmentioning

confidence: 99%

Second species ofEusthenodon(Tristichopteridae, Sarcopterygii) from the Upper Devonian (Famennian) Catskill Formation of Pennsylvania, U.S.A., and a review of globalEusthenodonoccurrence

Downs,

Osatchuck,

Goodchild

et al. 2022

Journal of Vertebrate Paleontology

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A new species of Eusthenodon from the Upper Devonian (Famennian) Catskill Formation was collected from associated talus blocks excavated during road construction along the northbound lanes of U.S. Route 15/Interstate 99 near Trout Run in Lycoming County, Pennsylvania, U.S.A. The new species is represented by isolated or partially articulated cranial bones, an anocleithrum, and body scales from several individuals. The new discovery is the second species of Eusthenodon described from the Catskill Formation after Eusthenodon bourdoni, a species found only at the Cogan House Exit Ramp locality, north of and up section from the Trout Run site. The new species is of a larger size category and exhibits qualities that distinguish it from E. bourdoni including a contact between posterior supraorbital and lacrimal bones that excludes the jugal from the orbital margin and scales with an ornamental field incised by radiating grooves. The clarity offered by the Catskill Formation Eusthenodon species informs an historical review of reports on Eusthenodon occurrence that suggests a polydemic but not cosmopolitan distribution of the taxon. A phylogenetic analysis of Tristichopteridae is presented that includes the new species presented here. The Eusthenodon species at Trout Run is the fifth tristichopterid species described from the Catskill Formation and all five are found to belong to a highly nested clade of largely Famennian tristichopterids. With a growing fauna that additionally includes rhizodontids, dipnoans, holoptychiid porolepiforms, megalichthyids, and limbed tetrapodomorphs, the Catskill Formation of Pennsylvania continues to be an important focus for the study of Late Devonian sarcopterygian evolution.

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Glyptopomus bystrowi (Gross, 1941), an “osteolepidid” tetrapodomorph from the Upper Famennian (Upper Devonian) of Latvia and Central Russia

Lebedev

Lukševičs

2016

Palaeobio Palaeoenv

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Palaeozoogeographical connections of the Devonian vertebrate communities of the Baltica Province. Part II. Late Devonian

Cited by 20 publications

References 23 publications

Frasnian vertebrate taphonomy and sedimentology of macrofossil concentrations from the Langsēde Cliff, Latvia

Frasnian vertebrate taphonomy and sedimentology of macrofossil concentrations from the Langsēde Cliff, Latvia

Second species ofEusthenodon(Tristichopteridae, Sarcopterygii) from the Upper Devonian (Famennian) Catskill Formation of Pennsylvania, U.S.A., and a review of globalEusthenodonoccurrence

Glyptopomus bystrowi (Gross, 1941), an “osteolepidid” tetrapodomorph from the Upper Famennian (Upper Devonian) of Latvia and Central Russia

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