1,721,096 research outputs found
Two new relict Syncordulia species found during museum and field studies of threatened dragonflies in the Cape Floristic Region (Odonata: Corduliidae)
No full textDijkstra, Klaas-Douwe B., Samways, Michael J., Simaika, John P. (2007): Two new relict Syncordulia species found during museum and field studies of threatened dragonflies in the Cape Floristic Region (Odonata: Corduliidae). Zootaxa 1467: 19-34, DOI: 10.5281/zenodo.17660
FIGURE 1. Strict consensus tree from a in Biogeography and divergence time estimation of the relict Cape dragonfly genus Syncordulia: global significance and implications for conservation
No full textFIGURE 1. Strict consensus tree from a PAUP parsimony heuristic search; 10,000 addition sequence replicates; bootstrap support shown above branchesPublished as part of Ware, Jessica L., Simaika, John P. & Samways, Michael J., 2009, Biogeography and divergence time estimation of the relict Cape dragonfly genus Syncordulia: global significance and implications for conservation, pp. 22-36 in Zootaxa 2216 (1) on page 27, DOI: 10.11646/zootaxa.2216.1.2, http://zenodo.org/record/532175
FIGURE 3. R8S in Biogeography and divergence time estimation of the relict Cape dragonfly genus Syncordulia: global significance and implications for conservation
No full textFIGURE 3. R8S analysis on a 26-taxon tree; Geological maps adapted from figures on rst.gsfc.nasa.gov.Published as part of Ware, Jessica L., Simaika, John P. & Samways, Michael J., 2009, Biogeography and divergence time estimation of the relict Cape dragonfly genus Syncordulia: global significance and implications for conservation, pp. 22-36 in Zootaxa 2216 (1) on page 30, DOI: 10.11646/zootaxa.2216.1.2, http://zenodo.org/record/532175
FIGURE 5 in Biogeography and divergence time estimation of the relict Cape dragonfly genus Syncordulia: global significance and implications for conservation
No full textFIGURE 5. Present distributions of Syncordulia species in South Africa. Uppermost box shows the distributions of all Syncordulia species, lower boxes show individual species distributions: S. gracilis (top and top left); S. legator (top right); S. serendipator (bottom left); S. venator (bottom right).Published as part of Ware, Jessica L., Simaika, John P. & Samways, Michael J., 2009, Biogeography and divergence time estimation of the relict Cape dragonfly genus Syncordulia: global significance and implications for conservation, pp. 22-36 in Zootaxa 2216 (1) on page 32, DOI: 10.11646/zootaxa.2216.1.2, http://zenodo.org/record/532175
FIGURES 5–8 in Two new relict Syncordulia species found during museum and field studies of threatened dragonflies in the Cape Floristic Region (Odonata: Corduliidae)
No full textFIGURES 5–8. Syncordulia male secondary genitalia in lateral view. The penis is indicated by dotted lines, as its position is variable. (5) S. gracilis; (6) S. legator n. sp.; (7) S. venator; (8) S. serendipator n. sp.Published as part of Dijkstra, Klaas-Douwe B., Samways, Michael J. & Simaika, John P., 2007, Two new relict Syncordulia species found during museum and field studies of threatened dragonflies in the Cape Floristic Region (Odonata: Corduliidae), pp. 19-34 in Zootaxa 1467 on page 23, DOI: 10.5281/zenodo.17660
Syncordulia Selys
No full textSyncordulia Selys — ‘Presbas’ Gomphomacromia (Syncordulia) Selys, 1882: clxviii [type species: Epophthalmia gracilis Burmeister, 1839; by monotypy]. Syncordulia Selys, 1882 – Kirby (1890: 52). Presba Barnard, 1933: 167 [type species: Presba venator Barnard, 1933; by original designation]; junior synonym – Lieftinck (1961: 410). Etymology. The etymology of Presba was never specified, but probably derives from the Greek presbys (elder). Meaning honoured or august, it conveys the distinct and ancient character of the genus. Barnard (1933) honoured two friends, an angler and a hunter (of insects), with the names piscator and venator. In keeping with this, it seems appropriate to honour ‘the gatherer’. We propose legator to highlight the legacy of collectors like Pinhey and Duke, who assembled most material of the species by that name. As was the case for the fourth species, most new species are chance discoveries: serendipator is derived from ‘The Three Princes of Serendip’. Horace Walpole coined the word serendipity to describe how the fairy-tale’s heroes “were always making discoveries, by accidents and sagacity, of things which they were not in quest of” (Winstanley 1984). The names acknowledge the importance of collections and renewed surveys and emphasize that voucher specimens play an important role in conservation biology. The form presba is feminine, and therefore does not match well with Barnard’s names, which are masculine nouns (H. Fliedner in litt.). However, because Barnard did not specify the etymology and gender of Presba, and because we regard the names as nouns in apposition, we do not amend them, placing nomenclatory stability and uniformity above a possible imbalance of gender. Diagnosis. The only corduliid genus in the region, where its venation is unique: (1) Fw with 7–10 Ax and 5–8 Px; (2) sectors of arculus not fused; (3) Fw with one, Hw with two Cux; (4) triangles, subtriangles and supratriangles in all wings uncrossed (save occasional exceptions); (5) Fw discoidal field of single cell-row at base; (6) Hw arculus distinctly proximal of triangle; (7) anal loop bow-shaped, with 6–11 cells in males and 9–14 in females. A notable feature of all species is that the eyes are bluish grey, whereas they are typically bright green in Corduliidae (including Macromiinae).Published as part of Dijkstra, Klaas-Douwe B., Samways, Michael J. & Simaika, John P., 2007, Two new relict Syncordulia species found during museum and field studies of threatened dragonflies in the Cape Floristic Region (Odonata: Corduliidae), pp. 19-34 in Zootaxa 1467 on pages 20-21, DOI: 10.5281/zenodo.17660
Corrigendum to “Future-proofing insect diversity” [Curr. Opin. Insect Sci. 12 (2015) 71-18]
No full textFuture-proofing insect diversity
No full textStrategies are urgently required to ensure long term maintenance of current levels of global insect diversity. Yet insect diversity is huge and immensely complex, with many species and individuals making up an important part of compositional and functional biodiversity worldwide. As only a fifth of all insects have been scientifically described, we have the task of conserving largely what is unknown. Inevitably, this means that there are various challenges and shortfalls to address when we aim to future-proof insect diversity. But there are also opportunities, especially when insects are seen as a major part of the fabric of life in most terrestrial and freshwater systems across the globe, and bearing in mind that they are of great value for human wellbeing. In view of the complexity of the task, strategies have to be based on easily conceptualized principles, and on effective operational tools, especially at the spatial level of the landscape. These principles and tools are developed here as a coherent framework for conserving as many insect populations and species as possible well into the Anthropocene
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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