Devonian and Carboniferous Brachiopods and Biostratigraphy of Transcaucasia

Alekseeva, R. E.; Afanasjeva, G. A.; Grechishnikova, I. A.; Oleneva, N. V.; Pakhnevich, A. V.

doi:10.1134/s0031030118080014

Cited by 14 publications

(24 citation statements)

References 50 publications

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“…The external and internal features observed (e.g., transversally elliptic outline, dorsibiconvex profile, weakly developed fold and sulcus, long and subparallel dental plates, relatively thick and low septum, relatively deep septalium, and connectivum bearing a median crest) in the two studied specimens indicate affinities to the genus Gesoriacorostrum Sartenaer, 2003, the presence of which in the SAB was recently documented by Pakhnevich in Alekseeva et al (2018a). However, the fold and sulcus are perceptible only anteriorly on our specimens, while the original material from the Boulonnais region in France displays fold and sulcus that start from mid-length.…”

Section: Systematic Paleontologysupporting

confidence: 68%

“…This is the first time that the genus Porthmorhynchus is recognized (although doubtfully) from the Armenian sections. It is also worth stressing that the genus is known so far only from the Frasnian-its type species, P. ferquensis, is known from the middle-upper Frasnian of northern France (Boulonnais region) and Nakhichevan (Pakhnevich in Alekseeva et al, 2018a). The other species assigned to this genus (P. elburzensis) is known from the upper Frasnian of the Alborz Mountains (northern Iran; Gaetani, 1965).…”

Section: Journal Of Paleontology 95(3):527-552mentioning

confidence: 99%

“…2, fig. 3a–c.2007 Centrorhynchus charakensis ; Brice and Deville, p. 11.2010 Ptychomaletoechia charakensis ; Mirieva, p. 74, table 1.2011 Centrorhynchus charakensis ; Grechishnikova and Levitskii, p. 22, table 1.2018a Sartenaerus charakensis , Pakhnevich in Alekseeva et al, p. 899, pl. 6, fig.…”

Section: Systematic Paleontologymentioning

confidence: 99%

“…The Upper Devonian sequences of the Lesser Caucasus (or Transcaucasia, Fig. 1) are remarkable in terms of their completeness and richness in fossil remains (Abrahamyan, 1957, 1964; Arakelyan, 1964; Alekseeva et al, 2018a, b). They have attracted the interest of pioneer geologists, such as the famous German geologist Hermann Abich, who first described Devonian outcrops and a new spiriferide species ( ‘Spirifer’ orbelianus ) from Armenia in 1858 (Serobyan et al, in press).…”

Section: Introductionmentioning

confidence: 99%

“…The latter brachiopods were partly revised by Abrahamyan (1974), in addition to newly studied Frasnian species. However, despite the extensive taxonomic studies led by Abrahamyan (1957, 1974) and more recently by Alekseeva et al (2018a, b), who mainly focused on brachiopods from Nakhichevan (Fig. 1), the taxonomy and biostratigraphy of lower Famennian brachiopod assemblages from Armenia still remain poorly understood.…”

Section: Introductionmentioning

confidence: 99%

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Lower Famennian (Upper Devonian) rhynchonellide and athyride brachiopods from the South Armenian Block

et al. 2021

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The lower Famennian ‘Cyrtospirifer’ orbelianus brachiopod Zone established in Armenia by Abrahamyan (1957) (coeval to the crepida conodont Zone) contains an abundant and diverse brachiopod fauna that still remains poorly studied. In an effort to revise and update its systematic classification and to assess the brachiopod diversity in this area after the Kellwasser extinction event at the end of the Frasnian, our attention is here focused on rhynchonellides and athyrides. Six rhynchonellide species are described belonging to five genera as well as a single athyride species (Crinisarina pseudoglobularis n. sp.), which is new to science. The genus Crinisarina is reported for the first time in the South Armenian Block (SAB), which was then part of the northern margin of Gondwana. Some of the rhynchonellides identified were previously recognized in this area, but they require modern documentation and taxonomic reassessment. More particularly, it is the first time that the internal structure of Sartenaerus baitalensis (Reed, 1922) is illustrated, taking into account that it is the type species of a biostratigraphically significant Famennian genus. One of the oldest punctate rhynchonellide species, Greira transcaucasica Erlanger, 1993, is described for the first time from Armenia and its intraspecific morphological variability is documented quantitatively. From a paleobiogeographic viewpoint, the studied brachiopod fauna clearly shares affinities with contemporaneous ones from other regions of the Gondwanan northern margin that extend eastwards of the SAB to Afghanistan and Pamir, although there are also some endemic elements. UUID: http://zoobank.org/798eb5f9-ad15-4d90-bc6a-ff22ee936438

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Section: Systematic Paleontologysupporting

confidence: 68%

Section: Journal Of Paleontology 95(3):527-552mentioning

confidence: 99%

Section: Systematic Paleontologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Lower Famennian (Upper Devonian) rhynchonellide and athyride brachiopods from the South Armenian Block

et al. 2021

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The Devonian-Carboniferous Boundary around the globe: a complement

Aretz

Corradini

Denayer

2021

Palaeobio Palaeoenv

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This article compiles data on the Devonian-Carboniferous Boundary successions from countries and regions, which have not been dealt with separately in this special issue. Data derive from different palaeocontinents on a large palaeoclimatic gradient from the southern high latitudes of western Gondwana through the palaeotropics into the temperate/boreal northern latitudes of Siberia. The quality of the data is variable, but often surprisingly good, although major uncertainties can persist and traditional positions of the boundary do not withhold modern stratigraphic results and concepts. Not all these regions have been on the forefront of the DCB discussions in recent years, but they provide invaluable insights into the regional and global dimensions of uppermost Devonian and lowermost Carboniferous changes in the biosphere and geosphere. Almost globally documented are faunal turnovers and collapse of ecosystems in the Hangenberg extinctions. Those allow the placement of the DCB even if index fossils are absent or scarce. However, it also shows the regional differences, which advocate for a holistic approach to the boundary by ensuring global correlation without relying on the conceptual dominance a single taxon, which might be less powerful outside its usual facies.

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