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Commensal anomiid bivalves on Late Cretaceous heteromorph ammonites from south‐west Japan
TLDR
The heteromorph ammonite Pravitoceras sigmoidale from the Upper Cretaceous Seidan Formation in south-west Japan is frequently encrusted by sessile anomiid bivalves, suggesting that the encrustation occurred not on post-mortem floating or sunken carcasses but on live conchs and that these organisms were rapidly buried by turbidity current deposits shortly after death. Expand
Spathian (Late Olenekian, Early Triassic) Ammonoids from the Artyom Area, South Primorye, Russian Far East and Implications for the Timing of the Recovery of the Oceanic Environment
Abstract. Five Spathian (late Olenekian) ammonoids are newly reported from the Zhitkov Formation in the Artyom section, South Primorye, Russian Far East. They include the early Spathian taxaExpand
Upper Cretaceous depositional environments and bivalve assemblages of far-east Asia: the Himenoura Group, Kyushu, Japan
Abstract The depositional environments and bivalve assemblages are determined for the Upper Cretaceous Hinoshima Formation of the Himenoura Group, Kamishima, Amakusa Islands, Kyushu, Japan. TheExpand
Churkites, a Trans-Panthalassic Early Triassic Ammonoid Genus from South Primorye, Russian Far East
Abstract. The taxonomy, biostratigraphy and paleobiogeographic origin of Churkites, an Early Triassic acuteventered arctoceratid ammonoid genus, are reported based on carefully controlledExpand
How Striations of Ophiuroid and Asteroid Trace Fossils were Produced—Observations of Tube-Feet Movement in Living Ophiuroids and Asteroids
Abstract. To clarify the process of producing the striations in the trace fossil Asteriacites, we observed the behavior of living ophiuroids and asteroids in aquariums. When ophiuroids stoppedExpand
Paleoecology of Inoceramus amakusensis Nagao et Matsumoto, 1940 (Bivalvia) in a Late Cretaceous shallow clastic sea: The Himenoura Group, Kyushu, Japan
Abstract The taphonomic features and paleoecology of this species were investigated focused on vertically embedded individuals of articulated Inoceramus amakusensis Nagao et Matsumoto. In theExpand
Taphonomy of Large Canadoceras (Ammonoid) Shells in the Upper Cretaceous Series in South Sakhalin, Russia
Abstract. Based on materials from the Krasnoyarka Formation in the Naiba area in south Sakhalin, Russia, taphonomic histories of a large Campanian ammonoid, Canadoceras kossmati Matsumoto, 1954, wereExpand
Timing of Bellerophontoid (Gastropoda) Demise in the Early Triassic of South Primorye, Russian Far East
Abstract. The stratigraphic distribution and modes of occurrence of Early Triassic Bellerophontoidea (Gastropoda) are studied at seven sections in South Primorye, Russian Far East, where depositionalExpand