328,819 research outputs found
Phylogenetics, systematics and biogeography of deep-sea Pennatulacea (Anthozoa: Octocorallia): evidence from molecules and morphology
No full textDespite its extreme environmental conditions, the deep sea harbours a unique andspecies-rich fauna of mostly unknown age and phylogeny. Pennatulids (Anthozoa:Octocorallia) are a group whose taxonomy and phylogenetic relationships remain poorlyknown and little studied, in spite of their abundance and ecological importance in softbottomcommunities. Phylogenetic analysis of a combination of partial ND2 and msh1sequences produced well-supported phylogenetic relationships for representative deepsea(and shallow-water) pennatulids at familial, generic and specific taxonomic levels.Generally, molecular data were congruent with current classification and previousphylogenetic reconstructions of the O. Pennatulacea based on morphology.Discrepancies were evident concerning the finer details for some families and genera: thiscan be attributable to the high frequency of homoplasy in pennatulids where reversals inevolution have led to taxa that possess apomorphic character states that are analogouswith plesiomorphic traits. Genetic analysis gave strong support that highly-derived taxaoccur in both shallow and deep water and that many may have differentiated anddispersed from the deep sea to the shallows. The Renillidae, which is considered one ofthe most primitive shallow-water families, evolved recently from deep-water ancestors.Conversely, the bathyal Anthoptilidae was the most primitive of families, and althoughmore evidence is required, pennatulids as a group may have originated in deep water.The systematics of the exclusively deep-sea genus Umbellula, which contains fortytwospecies, remains unclear despite the repeated attempts of revision. Incorporatingnew morphological and distributional data from the examination of recently collectedmaterial, together with type specimens, genetic analysis, and a critical study of theliterature, fifteen Umbellula species are here considered valid, including three new toscience. Eight species lack sclerites in the autozooids, U. magniflora, U. encrinus, U.antarctica, U. carpenteri and Umbellula sp.1 n. sp. (quadrangular axes), and U. huxleyi andU. pellucida (round axes); and seven possess autozooid sclerites, U. thomsoni and U.hemigymna (quadrangular axes), and U. monocephalus, U. aciculifera, U. durissima,Umbellula sp.2 n. sp. and Umbellula sp.3 n. sp. (round axes).Biogeographic data and genetic evidence supported the hypothesis that species ofUmbellula differentiated in the Indo-Pacific. Many radiated southwards to the Antarcticand later north into the Atlantic, E Pacific, Indian and Arctic oceans, occupying bathyaland abyssal depths. Other, older species that evolved via a separate evolutionarypathway, may have originated in the Indo-Pacific, and dispersed to the Subantarctic (U.sp.2 n. sp.) or Indian and Atlantic oceans (U. monocephalus). Further, morphologicalexamination of Umbellula showed it adapted to the oligotrophic conditions of the deepsea by reducing the number but increasing the size of the autozooids, and in doing so,enlarged the food-catchment area; abyssal species have done so even more extremely
Dolan, M J, QX6387
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/382101Surname: DOLAN. Given Name(s) or Initials: M J. Military Service Number or Last Known Location: QX6387. Missing, Wounded and Prisoner of War Enquiry Card Index Number: 46060.212627
Item: [2016.0049.14394] "Dolan, M J, QX6387
Dolan, V G, TX2782
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/382103Surname: DOLAN. Given Name(s) or Initials: V G. Military Service Number or Last Known Location: TX2782. Missing, Wounded and Prisoner of War Enquiry Card Index Number: 32175.212634
Item: [2016.0049.14396] "Dolan, V G, TX2782
Dolan, Vivian Alfred, TX8238
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/382104Surname: DOLAN. Given Name(s) or Initials: VIVIAN ALFRED. Military Service Number or Last Known Location: TX8238. Missing, Wounded and Prisoner of War Enquiry Card Index Number: 20442.212637
Item: [2016.0049.14397] "Dolan, Vivian Alfred, TX8238
Dolan, T F, 14467
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/382099Surname: DOLAN. Given Name(s) or Initials: T F. Military Service Number or Last Known Location: 14467. Missing, Wounded and Prisoner of War Enquiry Card Index Number: SEA-4234.212621
Item: [2016.0049.14392] "Dolan, T F, 14467
Dolan, W R, NX8152
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/382100Surname: DOLAN. Given Name(s) or Initials: W R. Military Service Number or Last Known Location: NX8152. Missing, Wounded and Prisoner of War Enquiry Card Index Number: 7273.212624
Item: [2016.0049.14393] "Dolan, W R, NX8152
Peter Dolan
No full textCronn, R., Dolan, P.C., Jogdeo, S., Wegrzyn, J.L., Neale, D.B., St. Clair, J.B. & Denver, D.R. (2017). Transcription through the eye of a needle: daily and annual cyclic gene expression variation in Douglas-fir needles. BMC Genomics, 18, 558.https://digitalcommons.morris.umn.edu/cosa2017/1018/thumbnail.jp
Molossus , Dolan 1989
No full textMolossus The lack of modern revisionary treatment of the South American forms of Molossus is a major impediment for identification. We found several references to be useful, however, including Miller (1913), Goodwin and Greenhall (1961, 1964), Husson (1962, 1978) and, especially, Dolan (1989). In addition, we consulted original descriptions and available holotypes to confirm our species determinations.Published as part of Simmons, Nancy B. & Voss, Robert S., 1998, The mammals of Paracou, French Guiana, a Neotropical lowland rainforest fauna. Part 1, Bats, pp. 1-219 in Bulletin of the American Museum of Natural History 237 on page 153, DOI: 10.5281/zenodo.454505
DNA Arrays
No full textThis animation from Cold Spring Harbor Laboratory's Dolan DNA Learning Center presents DNA arrays. The animation contains information on Pat Brown's discovery and the purpose of DNA arrays to study gene expression as well as its role in the development of pharmacogenomic treatment for diseases such as cancer
DNA Arrays
No full textThis animation from Cold Spring Harbor Laboratory's Dolan DNA Learning Center presents DNA arrays. The animation contains information on Pat Brown's discovery and the purpose of DNA arrays to study gene expression as well as its role in the development of pharmacogenomic treatment for diseases such as cancer
- …
