John W. Neale

The Subdivision of the Upper D Beds of the Speeton Clay of Speeton, East Yorkshire

Considerable confusion has existed concerning the D beds of the Speeton clay (lower Cretaceous) in eastern Yorkshire, northern England, part of which arose from misidentification of ammonites. The D 2 -D 3 boundary is therefore redefined, and, to avoid any further confusion, a definitive section of the upper D beds is described.

Cretaceous Ostracoda of the North Atlantic Basin

Abstract For most of Lower Cretaceous time, North Atlantic ostracod faunas are only well-developed in the Eastern area and our knowledge is one-sided. Marine transgression and the extension of deposition in the Albian and Upper Cretaceous gave excellent faunas on both sides of the Atlantic and the Basin appears ‘two-sided’. Besides being stratigraphically useful, the ostracods provide ecological information on factors such as salinity, temperature and migration.

Ostracoda—A Historical Perspective

Publisher Summary This chapter presents a historical perspective of Ostracoda. It is reported that progress in the early days was slow and dominated by taxonomy. Work on fossil ostracods gathered pace in the first half of the 19 th century but their use in biostratigraphy was overshadowed by other groups. Ostracods as victims of predators are much better known. At the turn of the century Scott was investigating the numbers and taxonomy of ostracods eaten by fish for the Fisheries Board of Scotland. They are also known to be eaten by a wide variety of other organisms such as ragworms, echinoids, gastropods, and amphibians. There is even a record from the Trias of India of freshwater ostracods ingested, apparently accidently, by what is thought to have been a rhynchosaur while munching vegetation. By the 1960 interest was widening and a number of studies appeared that covered new ground. The mathematical concepts have been introduced into the discrimination of species in what may be called mathematical taxonomy. Leaving aside the “mainstream” branches of ostracod study, the recent years have witnessed various innovative studies of which only a very limited number can be quoted.

New Cold Water Recent and Pleistocene Species of the Ostracod Genus Cytheropteron

The new species Cytheropteron arcticum and C. nodosoalatum which are considered to be Recent species characteristic of cold marine waters are diag nosed and described. The new species C. dimlingtonensis which is only known from the Pleistocene Bridlington Crag of England and from englacial material from the Aavatsmarkbreen glacier of Spitzbergen is also diagnosed and described.

The Anatomy of the Ostracod Pelecocythere purii sp. nov. and some Features connected with the Abyssal Mode of Life in this and some other Deep Water Forms

The new species Pelecocythere purii is distinguished from P. sylvesterbradleyi and its anatomy compared with that of the shallow water type species of Cytheropteron . Some modifications, probably connected with its life in deep waters, are noted and attention is drawn to some features of other abyssal ostracods.

Plio/Pleistocene Candonidae (Freshwater Ostracoda) from boreholes in The Nanning Area, Guangxi Province, Southern China

Six cored boreholes in Guangxi Province, southern China yielded a fauna of Cypridacea as well as diverse Limnocytheridae which will be the subject of a separate publication. This paper deals only with the Cypridacea. Four species of Candona were present of which three are new, one previously described species of Candoniella (a controversial genus which is probably a synonym of Candona) and one new species of Pontoniella.