Anabarites trisulcatus Missarzhevsky

Kouchinsky, Artem, Bengtson, Stefan, Clausen, Sébastien & Vendrasco, Michael J., 2015, An early Cambrian fauna of skeletal fossils from the Emyaksin Formation, northern Siberia, Acta Palaeontologica Polonica 60 (2), pp. 421-512 : 499

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

 

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).

Kingdom

Animalia

Phylum

Annelida

Class

Polychaeta

Genus

Anabarites

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