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Cardiff, United Kingdom

Specimens of Mytilopsis leucophaeata, the Dark False Mussel, have been found in a shell collection dating from the early 19 century. The four shells are attributed to William Lyons (1766-1849) with the locality 'Tenby' (Pembrokeshire, South Wales). Evidence from the Lyons collection in the Tenby Museum suggests that the majority was acquired around 1800-1830, which indicates that Lyons had shells before Conrad described the species in 1831 and some 150 years before it was first recorded in the British Isles. This paper reaffirms the relevance of early museum collections to contemporary environmental agendas.

Cope J.C.W.,National Museum of Wales
Proceedings of the Geologists' Association | Year: 2014

An account is given of a Geologists' Association meeting in the Isle of Purbeck held on 28th-30th September 2012 and the stratigraphy and structures of the rocks examined during the weekend are described. Uppermost Jurassic Stage nomenclature and recent changes to stratigraphical nomenclature in the uppermost part of the Kimmeridge Clay Formation are discussed and the conclusion reached that the long-established divisions (Members) of this Formation are both readily recognisable and have nomenclatorial priority. The recent change to the position of Pallasioides-Rotunda zonal boundary ignores the ammonite fauna and is inappropriate. For the Lulworth district the stratigraphy of the uppermost Jurassic (Portlandian) through Lower and Upper Cretaceous formations are described and their associated structures discussed. The coastal evolution of the Lulworth coast is briefly discussed. © 2013 The Geologists' Association.

Three dimensional tubular structures of the ctenidium of some thyasirid bivalves are described for the first time. The classification of the thyasirid gill is modified accordingly into five types based on the number of demibranchs, reflection of the filaments and shape of the filaments, either rod, laminar or tubular. The tubular structure is seen in its most modified form in a chemosymbiotic abyssal species from the south-east Atlantic, which is described here as Ochetoctena tomasi gen et sp. nov.

Cope J.C.W.,National Museum of Wales
Proceedings of the Geologists' Association | Year: 2015

The higher parts of the cores of the Swanworth Boreholes, Dorset, allow detailed investigation of parts of the Upper Jurassic Kimmeridge Clay Formation that are difficult to sample on the coastal type-section. The member-level divisions set up by Buckman and Arkell are confirmed as readily recognisable. Body-fossils have been found throughout the beds examined and are recorded and confirm the ammonite zonal boundaries as proposed by Cope (1978). The extensive bioturbation of the sediments in the highest beds was primarily caused by decapod crustaceans whose remains are preserved in the borehole cores. Detailed examination of the cores has failed to confirm the existence of the so-called Chapman's Pool Pebble Bed, nor can its existence at nearby Gad Cliff be confirmed. © 2014 The Geologists' Association.

Plant A.R.,National Museum of Wales
Systematic Entomology | Year: 2011

A cladistic analysis of adult morphological characters was used to hypothesize phylogenetic and zoogeographical relationships in Hemerodromiinae (Diptera: Empididae). Afrodromia Smith, Drymodromia Becker and an undescribed Chilean genus subtended a sister-group relationship between the tribes Chelipodini and Hemerodromiini. Chelipodozus Smith and an undescribed Australian genus were supported only weakly in Hemerodromiini, and are regarded as incertae sedis within Hemerodromiinae. In Chelipodini, Anaclastoctedon Plant and an undescribed Australian genus subtended all others that form two sister-group clades. (i) A widespread Chelipoda-like group comprising Achelipoda Yang, Zhang & Zhang, Ptilophyllodromia Bezzi, Chelipoda Macquarts.s. and Phyllodromia Zetterstedt s.s. has a worldwide distribution, excepting the Afrotropical, considered to date from before or during the early phase of Gondwanan fragmentation. Phyllodromia s.s. is an exclusively Palaearctic genus of doubtful validity, to which Southern Hemisphere forms have been assigned incorrectly. Ptilophyllodromia Bezzi syn.n. is regarded as a junior synonym of Chelipoda, with the included species relegated to a species group. (ii) An austral Chelipoda-like group confined to New Zealand, New Caledonia, Lord Howe Island and Vanuatu, includes Monodromia Collin and species currently incorrectly assigned to Chelipoda and Phyllodromia. The group is hypothesized as a relictual Gondwanan element that has survived Oligocene drowning as metapopulations persisting in situ on ephemeral islands along arcs, ridges and buoyant crustal blocks overlying hot spots in New Zealand and the Southwest Pacific. In the tribe Hemerodromiini, many Southern Hemisphere species assigned currently to Hemerodromia Meigen, Cladodromia Bezzi and Neoplasta Coquillett require reassignment. The sister-group relationship between the southern African endemic Afrodromia and other Hemerodromiinae is viewed as evidence of early divergence of Hemerodromiinae and Empidinae by the early Cretaceous, pre-dating major Gondwanan fragmentation. An assessment of fossil forms indicated that Chelifera detestata (Meunier) from Eocene/Oligocene Baltic amber is the only genuine described fossil representative of Hemerodromiinae. © 2010 The Author. Systematic Entomology © 2010 The Royal Entomological Society.

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