...TABLE 2. MULTIPLE REGRESSIONS ON PSEUDOMYTILOIDES DUBIUS SIZE ...

... horizon coincides with the first of the abrupt carbon isotope shifts that characterize this interval, and with increases in sea surface temperature, continental weathering rates, and seawater anoxia. Pseudomytiloides dubius is the only abundant benthic macroinvertebrate during the most hostile...

... of Far East Russia, with Pseudomytiloides rassochaensis Polubotko, 1968 , as the type, and referred it to the Retroceramidae. This genus was only used again by Aberhan ( 1998 ) for Early Jurassic material from western Canada ( Arctomytiloides ? cf. rassochaensis and Arctomytiloides...

...Fig. 3.— Examples of the macroinvertebrates discussed here, from SMNS 81841. A ) P = Pseudomytiloides dubius . B ) S = Sinosura brodiei (arm), O = Oxytoma inaequivalvis . C ) Harpoceras elegans . D ) P = Parvamussium pumilus , A = Ammonite aptychus (unidentified). ...

...—total organic carbon. Benthic genera: M .— Meleagrinella ; B .— Bositra ; P .— Pseudomytiloides . ...

... loose on the foreshore at Port Mulgrave, but are also associated with ammonites identified as Tiltoniceras antiquum (Wright), which suggests that they probably derived from the Grey Shale Member also. In contrast, the occurrence of crushed specimens of the inoceramid bivalve Pseudomytiloides...

... Aalenian genera of bivalves came chiefly from the Upper Toarcian ( Tancredia , Dacryomya , Oxytoma , Pseudomytiloides , Arctotis , etc.); the rest are new genera ( Mclearnia , Retroceramus , Astarte , Jupiteria , Arctica , etc.), which impart a specific character to the whole Arctic bivalve...

...-oxygen specialist, bivalves Pseudomytiloides and Bositra ( Little 1995 ; Danise et al. 2013 ; Caswell and Dawn 2019 ). At the same time, sphaeromorph- and Tasmanites- dominated plankton communities replaced earlier dinoflagellate communities ( Slater et al. 2019 ; Danise et al. 2022...

...), ( c ) Pyritized valves of Pseudomytiloides dubius at 161.30 m in the Bituminous Shales (Falciferum Subzone), ( d ) Pyritized valve of Bositra buchi (or radiata ) and an ammonite aptychus at 172.50 m in the Grey Shale Member (Semicelatum Subzone), ( e ) 30 cm thick block (top: 186.20 m) showing...

... debris (bones and scales). The calcareous beds yielded relatively abundant belemnite rostra, juvenile and adult ammonites, bivalves ( Pseudomytiloides dubius and other unidentified taxa) remains of marine reptiles and fishes and, at some levels, isolated brachiopod shells ( Fig...

..., Nuculidae, Nuculanidae, Malletiidae, and Arcticidae, represented by few genera and often endemic species. In the second half of the Early Jurassic, Pseudomytiloides are widespread, and in the Pliensbachian Harpax and Myophoria . In the Middle Jurassic, the predominant organisms are Retroceramidae...

... of a Pseudomytiloides marine bivalve, Upper Toarcian in age, found in Vostok-3, in the upper part of the sand bed (identified by O.V. Urman), suggest short marine ingressions like those in the Sharapovo Horizon. The Tyumen’ Formation (Upper Aalenian–Upper Bathonian) is 372 m thick in Vostok-3, 350 m, in Vostok-4...