11 Works

Data from: Metamorphosis revealed: time-lapse three-dimensional imaging inside a living chrysalis

Tristan Lowe, Russell J. Garwood, Thomas J. Simonsen, Robert S. Bradley & Philip J. Withers
Studies of model insects have greatly increased our understanding our animal development. Yet they are limited in scope to this small pool of model species: a small number of representatives for a hyperdiverse group with highly varied developmental processes. One factor behind this narrow scope is the challenging nature of traditional methods of study, such as histology and dissection, which can preclude quantitative analysis and do not allow the development of a single individual to...

Data from: A new exceptionally preserved Cambrian priapulid from the Chengjiang Lagerstätte

Xiaoya Ma, Richard J. Aldridge, David J. Siveter, Derek J. Siveter, Xianguang Hou & Gregory D. Edgecombe
A fossil priapulid, Eximipriapulus globocaudatus new genus new species, is described from the Cambrian Chengjiang Lagerstätte of Yunnan, China. The exceptional preservation of the animal reveals morphological details that allow direct comparison with extant priapulids. The body is divisible into a partially eversible pharynx, a smooth collar, a scalid-bearing introvert, a neck with triangular scalids, an unsegmented trunk with annulations, and a distinctly expanded terminal region. Several specialized regions of the alimentary canal are recognized:...

Data from: High lability of sexual system over 250 million years of evolution in morphologically conservative tadpole shrimps

Thomas C. Mathers, Robert L. Hammond, Ronald A. Jenner, Thorid Zierold, Bernd Hänfling & Africa Gómez
Background: Sexual system is a key factor affecting the genetic diversity, population structure, genome structure and the evolutionary potential of species. The sexual system androdioecy -- where males and hermaphrodites coexist in populations -- is extremely rare, yet is found in three crustacean groups, barnacles, a genus of clam shrimps Eulimnadia, and in the order Notostraca, the tadpole shrimps. In the ancient crustacean order Notostraca, high morphological conservatism contrasts with a wide diversity of sexual...

Data from: Echinorhynchus salmonis Müller, 1784 (Acanthocephala: Echinorhynchidae) from the Bothnian Bay, Baltic Sea: morphological variability and radial asymmetry of proboscis hooks

Matthew T. Wayland, David I. Gibson & Christina Sommerville
Echinorhynchus salmonis is a common parasite of salmoniform and other fishes, occurring in fresh and brackish waters throughout the Holarctic. Presented here is the first analysis of the morphometric and meristic variation in a Palaearctic population of E. salmonis, collected from whitefish Coregonus lavaretus L. and smelt Osmerus eperlaus (L.) from the Bothnian Bay, northern Baltic Sea. Morphological data were compared with published descriptions of congeneric taxa. Nearctic populations of salmonid echinorhynchids considered by some...

Data from: Echinorhynchus brayi n. sp. (Acanthocephala: Echinorhynchidae) from Pachycara crassiceps (Roule) (Zoarcidae), a deep-sea fish

Matthew T. Wayland, Christina Sommerville & David I. Gibson
Echinorhynchus brayi n. sp. (Palaeacanthocephala: Echinorhynchidae) is described from Pachycara crassiceps (Roule) (Zoarcidae) from the Porcupine Seabight, Northeast Atlantic. The new species closely resembles E. canyonensis Huffman & Kliever, 1977, a parasite of a Pacific zoarcid, but has longer lemnisci, larger eggs and larger testes. E. brayi n. sp. can be readily differentiated from the ten other Echinorhynchus spp. recorded from deep-sea fishes (E. abyssicola, E. gadi, E. longiproboscis, E. malacocephali, E. melanoglaeae, E. muraenolepisi,...

Data from: Do differences in food web structure between organic and conventional farms affect the ecosystem service of pest control?

Sarina Macfadyen, Rachel Gibson, Andrew Polaszek, Rebecca J. Morris, Paul G. Craze, Robert Planqué, William O.C. Symondson & Jane Memmott
While many studies have demonstrated that organic farms support greater levels of biodiversity, it is not known whether this translates into better provision of ecosystem services. Here we use a food-web approach to analyse the community structure and function at the whole-farm scale. Quantitative food webs from 10 replicate pairs of organic and conventional farms showed that organic farms have significantly more species at three trophic levels (plant, herbivore and parasitoid) and significantly different network...

Data from: Morphometric discrimination of two allozymically diagnosed sibling species of the Echinorhynchus gadi Zoega in Muller complex (Acanthocephala) in the North Sea.

Matthew T. Wayland, David I. Gibson & Christina Sommerville
Allozyme electrophoresis was used to detect biological species of the E. gadi complex from gadids from the northern North Sea. A fixed difference at one of nine enzyme loci surveyed confirmed the existence of two reproductively isolated, sympatric species. Mixed infections of two E. gadi spp. (termed A and B) were observed in Gadus morhua and Pollachius virens. E. gadi sp. B was also found in Melanogrammus aeglefinus and Merlangius merlangus. The presence of gravid...

Data from: Molecular phylogenetics of Gobioidei and phylogenetic placement of European gobies

Ainhoa Agorreta, Diego San Mauro, Ulrich Schliewen, James L. Van Tassell, Marcelo Kovačić, Rafael Zardoya & Lukas Rüber
Gobioidei is one of the largest suborders of teleost fishes, with nearly 2000 extant species currently recognized. They have a worldwide distribution and show a spectacular variety in morphology, ecology, and behavior. Despite their importance, phylogenetic relationships among many groups of gobioids (including some of the major lineages) still remain poorly understood. In this study, we analyze sequence data of five molecular markers (two mitochondrial and three nuclear) averaging 6000 bp for 222 species of...

Data from: Heterogeneous models place the root of the placental mammal phylogeny

Claire C. Morgan, Peter G. Foster, Andrew E. Webb, Davide Pisani, James O. McInerney & Mary J. O'Connell
Heterogeneity among life traits in mammals has resulted in considerable phylogenetic conflict, particularly concerning the position of the placental root. Layered upon this are gene- and lineage-specific variation in amino acid substitution rates and compositional biases. Life trait variations that may impact upon mutational rates are longevity, metabolic rate, body size and germ line generation time. Over the past 12 years, three main conflicting hypotheses have emerged for the placement of the placental root. These...

Data from: Evolution of Manduca sexta hornworms and relatives: biogeographical analysis reveals an ancestral diversification in Central America

Akito Y. Kawahara, Jesse W. Breinholt, Francesca V. Ponce, Jean Haxaire, Lei Xiao, Greg P. A. Lamarre, Daniel Rubinoff & Ian J. Kitching
The hawkmoth genus Manduca is a diverse group of very large, conspicuous moths that has served as an important model across many biological disciplines. Two species in particular, the tobacco hornworm (Manduca sexta) and the tomato hornworm (Manduca quinquemaculatus) have been researched extensively. Studies across biological fields have referred to these two species as being closely related or even sister species, but the extent to which these two model organisms are related remains largely unknown....

Data from: A giant pliosaurid skull from the Late Jurassic of England

Roger B. J. Benson, Mark Evans, Adam S. Smith, Judyth Sassoon, Scott Moore-Faye, Hilary F. Ketchum & Richard Forrest
Pliosaurids were a long-lived and cosmopolitan group of marine predators that spanned 110 million years and occupied the upper tiers of marine ecosystems from the Middle Jurassic until the early Late Cretaceous. A well-preserved giant pliosaurid skull from the Late Jurassic Kimmeridge Clay Formation of Dorset, United Kingdom, represents a new species, Pliosaurus kevani. This specimen is described in detail, and the taxonomy and systematics of Late Jurassic pliosaurids is revised. We name two additional...

Registration Year

  • 2013
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  • Dataset
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Affiliations

  • Natural History Museum
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  • University of Stirling
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  • University of Leicester
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  • University of Bristol
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  • University of Oxford
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  • Yunnan University
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  • VU University Amsterdam
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  • University of Sussex
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  • University of Cambridge
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  • New Walk Museum and Art Gallery
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