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Hints, O. & Nõlvak, 2006

Hints, O., Nõlvak, J. 2006. Early Ordovician scolecodonts and chitinozoans from Tallinn, North Estonia. Review of Palaeobotany and Palynology 139 (1-4), 189-209. | DOI | DETAILS

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ID766
ReferenceHints, O. & Nõlvak, 2006
AuthorHints, O., Nõlvak, J.
Year2006
TitleEarly Ordovician scolecodonts and chitinozoans from Tallinn, North Estonia
JournalReview of Palaeobotany and Palynology
Volume139
Number1-4
pgs.189-209
Source typearticle in journal
LanguageEnglish
Remarks4 fototahvlit
DOI10.1016/j.revpalbo.2006.01.004
Abstract

In the Lower Ordovician siliciclastic succession of Kadriorg, Tallinn, North Estonia, scolecodonts were recorded at different stratigraphical levels starting from the lower Tremadocian, and a rich assemblage of chitinozoans was found from the Paroistodus proteus Conodont Zone. This is one of the earliest records of scolecodonts in the world and extends the range of this fossil group for more than 15 m.y. in Baltica. Based on fused and reconstructed jaw apparatuses, the new genus Kadriorgaspis and two new species, Kadriorgaspis kaisae and “Xanioprionviivei, are introduced and the diagnosis of the family Conjungaspidae is emended. In addition, two species are described under open nomenclature and several isolated jaws with unclear affinities are discussed. This discovery indicates the importance of conjungaspids and xanioprionids in the early diversification history of eunicidans.

The chitinozoan assemblage is characterised by unusually high abundance and diversity. In one sample, 12 species were identified, including representatives of Lagenochitina, Eremochitina, Cyathochitina?, Euconochitina, Desmochitina, Velachitina, Rhabdochitina, and Clavachitina. These chitinozoans display considerable variability of many morphologic characters that become diagnostic at the species and genus level during the Mid- and Late Ordovician. The general taxonomic composition of the chitinozoan assemblage indicates close biogeographical connections between Baltica and North Gondwana.


Sections studied or mentioned

Localitypgs.Figs.Remarks
Museum of Art excavation section, Kadriorg

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<i><i>Clavachitina</i> | Clavachitina sp.</i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-78) <i><i>Cyathochitina? clepsydra</i></i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-51) <i><i>Cyathochitina? clepsydra</i></i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-52) <i><i>Cyathochitina? clepsydra</i></i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-53) <i><i>Cyathochitina? clepsydra</i></i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-54) <i><i>Cyathochitina? clepsydra</i></i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-55) <i><i>Cyathochitina? clepsydra</i></i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-56) <i><i>Chitinozoa</i> | Cyathochitina? clepsydra Grahn, 1984 / Euconochitina symmetrica (Taugourdeau et de Jekhowsky, 1960)</i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-57) <i><i>Chitinozoa</i> | Desmochitina sp. A, aff. bulla Taugourdeau et de Jekhowsky, 1960</i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-62) <i><i>Chitinozoa</i> | Desmochitina sp. A, aff. bulla Taugourdeau et de Jekhowsky, 1960</i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-65) <i><i>Chitinozoa</i> | Desmochitina sp. group minor Eisenack, 1931</i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-63) <i><i>Chitinozoa</i> | Desmochitina sp. group minor Eisenack, 1931</i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-64) <i><i>Chitinozoa</i> | Desmochitina sp. group minor Eisenack, 1931</i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-66) <i><i>Chitinozoa</i> | Desmochitina? sp.</i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-67) <i><i>Eremochitina</i> | Eremochitina sp. A, aff. baculata Taugourdeau et de Jekhowsky 1960</i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-68) <i><i>Eremochitina</i> | Eremochitina sp. A, aff. baculata Taugourdeau et de Jekhowsky 1960</i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-69) <i><i>Eremochitina</i> | Eremochitina sp. A, aff. baculata Taugourdeau et de Jekhowsky 1960</i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-70) <i><i>Eremochitina</i> | Eremochitina sp. A, aff. baculata Taugourdeau et de Jekhowsky 1960</i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-71) <i><i>Eremochitina</i> | Eremochitina sp. A, aff. baculata Taugourdeau et de Jekhowsky 1960</i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-72) <i><i>Eremochitina</i> | Eremochitina sp. A, aff. baculata Taugourdeau et de Jekhowsky 1960</i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-73) <i><i>Eremochitina</i> | Eremochitina sp. A, aff. baculata Taugourdeau et de Jekhowsky 1960</i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-74) <i><i>Eremochitina</i> | Eremochitina sp. A, aff. baculata Taugourdeau et de Jekhowsky 1960</i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-75) <i><i>Eremochitina</i> | Eremochitina sp. A, aff. baculata Taugourdeau et de Jekhowsky 1960</i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-76) <i><i>Eremochitina</i> | Eremochitina sp. A, aff. baculata Taugourdeau et de Jekhowsky 1960</i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-75) <i><i>Euconochitina primitiva</i> | Euconochitina primitiva Szaniawski, 1974</i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-59) <i><i>Euconochitina primitiva</i> | Euconochitina primitiva Szaniawski, 1974</i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-60) <i><i>Euconochitina primitiva</i> | Euconochitina primitiva Szaniawski, 1974</i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-61) <i><i>Euconochitina symmetrica</i></i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-58) <i><i>Chitinozoa</i> | Lagenochitina cf. longiformis (Obut, 1995)</i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-91) <i><i>Lagenochitina esthonica</i></i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-92) <i><i>Lagenochitina longiformis</i></i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-80) <i><i>Lagenochitina longiformis</i></i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-81) <i><i>Lagenochitina longiformis</i></i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-82) <i><i>Lagenochitina longiformis</i></i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-83) <i><i>Lagenochitina longiformis</i></i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-84) <i><i>Lagenochitina longiformis</i></i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-85) <i><i>Lagenochitina longiformis</i></i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-86) <i><i>Lagenochitina longiformis</i></i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-87) <i><i>Lagenochitina longiformis</i></i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-88) <i><i>Lagenochitina longiformis</i></i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-89) <i><i>Lagenochitina longiformis</i></i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-90) <i><i>Rhabdochitina gracilis</i></i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-77) <i><i>Chitinozoa</i> | Velachitina cf. veligera Poumot, 1968</i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-79) <i><i>Chitinozoa</i> | Velachitina cf. veligera Poumot, 1968</i><br />Museum of Art excavation section, Kadriorg, 0.30 m, Hunneberg Stage ( 424-79)