An oribatid mite (Arachnida: Acari) from the Oxford Clay (Jurassic: Upper Callovian) of South Cave Station Quarry, Yorkshire, UK

A single specimen of a new species of oribatid mite belonging to the genus Jureremus Krivolutsky, in Krivolutsky and Krassilov 1977, previously described from the Upper Jurassic of the Russian Far East, is described as J. phippsi sp. nov. The mite is preserved by iron pyrite replacement, and was recovered by sieving from the Oxford Clay Formation (Jurassic: Upper Callovian) of South Cave, Yorkshire. It is the first record of a pre-Pleistocene mite, and the second species record of the family Cymbaeremaeidae, from the British Isles; also, it is only the third record of Acari from the Jurassic Period. The presence of a terrestrial mite in a sedimentary sequence of open marine origin is noteworthy, and suggestions for its mode of transport to the site of deposition are discussed

Palynostratigraphy of the Triassic–Jurassic transition in southern Sweden

Palynological samples from Upper Triassic and Lower Jurassic exposures and borehole sections of the Hoganas and Rya formations (Fm), NW Skane (Sweden), exhibit diverse and generally well-preserved palynomorph assemblages that can be divided into four miospore zones (from bottom to top): (1) the informal "Topmost upper Rhaetian" zone of Lund; (2) the TSI assemblage zone which spans the Triassic-Jurassic (T-J) boundary; (3) the Hettangian Pinuspollenites-Trachysporites Zone and (4) the Sinemurian Cerebropollenites macroverrucosus Zone. Uppermost Rhaetian and T-J boundary strata have previously been considered to be absent in Skane, but are identified palynologically in all but one (Kulla-Gunnarstorp) section in this study. The palynological assemblages characterise continental deposition with intermittent marine influences. The presence of well-preserved miospores in nearly all assemblages indicates minimal transport during dispersal and deposition. The T-J transition is characterised by a spore-spike, not previously recognised in T-J assemblages of Skane. However, the upper Hettangian and Sinemurian assemblages of this study are similar in composition to coeval palynofloras derived from sediments deposited in paralic environments elsewhere in Skane and Denmark