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Chitinozoans and scolecodonts from the Silurian and Devonian of Japan
Author(s) -
Vandenbroucke Thijs R. A.,
Hints Olle,
Williams Mark,
Wallis Simon,
Velleman Jules,
Kurihara Toshiyuki,
Tanaka Gengo,
Komatsu Toshifumi,
Männik Peep,
Siveter David J.,
de Backer Tim
Publication year - 2019
Publication title -
island arc
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.554
H-Index - 58
eISSN - 1440-1738
pISSN - 1038-4871
DOI - 10.1111/iar.12294
Subject(s) - baltica , devonian , paleontology , terrane , geology , paleozoic , laurentia , palynology , acritarch , conodont , ordovician , fauna , biostratigraphy , tectonics , ecology , biology , pollen
Silurian and Devonian chitinozoans and scolecodonts are recorded from strata of the Hida‐Gaien Terrane, central Honshu. Silurian chitinozoans include Eisenackitina , Bursachitina , and the species Angochitina elongata . The latter provides a precise biostratigraphical tie between the Japanese succession and the Type Ludlow Series of the Welsh Borderland, UK, and indicates a Ludlow age (Gorstian or early Ludfordian) for the upper member of the Yoshiki Formation in the Ichinotani Valley. Chitinozoans from other Yoshiki Formation localities contain other specimens of Lagenochitinidae. Scolecodonts are more common than chitinozoans in the palynological residues, but are mostly represented by fragments or minor apparatus elements with a low biostratigraphical value. However, material from the Yoshiki and Fukuji Formations includes several species of Mochtyella as well as representatives of Oenonites , Kettnerites , Lunoprionella , Vistulella ? and possibly other placognath taxa. Scolecodonts are also present in the Silurian Middle Member of the Gionyama Formation, Kyushu, including a well‐preserved jaw of Pistoprion , and fragments of putative Kettnerites and Oenonites . These finds of scolecodonts suggest close similarity in assemblages between Paleozoic polychaete faunas of Japanese terranes and those of Baltica‐Laurentia.