Anabarites trisulcatus Missarzhevsky
publication ID |
https://doi.org/ 10.4202/app.2012.0004 |
persistent identifier |
https://treatment.plazi.org/id/03C3891D-1562-C23C-FF00-F996CA6AFC42 |
treatment provided by |
Felipe |
scientific name |
Anabarites trisulcatus Missarzhevsky |
status |
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Anabarites trisulcatus Missarzhevsky in Voronova and Missarzhevsky, 1969
Fig. 69A, E View Fig .
Material.—Two calcium phosphatic internal moulds, SMNH X 4818 and 4819, from sample 7/25.6. Emyaksin Formation,
Bol’shaya Kuonamka River; correlated with the Profallotaspis jakutensis Zone , lower Atdabanian Stage.
Description.—Irregularly curved, slowly expanding internal moulds with tri-fold transverse profiles. Three rounded lobes are separated by narrow and shallow but distinct, grooves. The smaller mould (presumably a younger growth stage) carries transverse growth lines ( Fig. 69E View Fig ).
Remarks.— Anabarites spp. described herein are the first occurrences of anabaritids from Stage 3 in Siberia. These forms often occur within the Terreneuvian Medvezhya and lower Emyaksin Formations of the Anabar Uplift (see Kouchinsky et al. 2009). Anabarites trisulcatus is indicated from the low- er part of the section by Val’kov (1975: 12; see also Val’kov 1987: fig. 3). Outside the Siberian Platform anabaritids are reported to range into the Cambrian Series 2, Atdabanian– Botoman equivalent strata, in Mongolia ( Esakova and Zhegallo 1996), South and North China ( Feng 2005; Li et al. 2007; Steiner et al. 2007), Australia ( Bengtson et al. 1990), Baltica ( Kouchinsky et al. 2009) , and possibly in the Mediterranean region ( Elicki 1994).
Stratigraphic and geographic range.—Lower Cambrian worldwide (see Kouchinsky et al. 2009).
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