1,721,091 research outputs found
Mastogloia jahniae sp. nov., a new diatom (Bacillariophyceae) from the Baltic Sea coast of Sweden
No full textAl-Handal, Adil Y., Wulff, Angela, Pennesi, Chiara (2021): Mastogloia jahniae sp. nov., a new diatom (Bacillariophyceae) from the Baltic Sea coast of Sweden. Phytotaxa 484 (1): 121-128, DOI: 10.11646/phytotaxa.484.1.6, URL: http://dx.doi.org/10.11646/phytotaxa.484.1.
Fallacia fawensis sp. nov., a new brackish water diatom (Bacillariophyceae) from Southern Iraq
No full textAl-Handal, Adil Y., Al-Shaheen, Maitham A., Al-Saedy, Rehab N., Wulff, Angela (2022): Fallacia fawensis sp. nov., a new brackish water diatom (Bacillariophyceae) from Southern Iraq. Phytotaxa 550 (1): 71-78, DOI: 10.11646/phytotaxa.550.1.
FIGURES 1–10 in Fallacia fawensis sp. nov., a new brackish water diatom (Bacillariophyceae) from Southern Iraq
No full textFIGURES 1–10: Fallacia fawensis Al-Handal, Al-Shaheen, Al-Saedy & Wulff sp. nov., LM images of the type material from Shatt Al–Arab River, Southern Iraq showing valve size and outline variation. Scale bar = 10 μm.Published as part of Al-Handal, Adil Y., Al-Shaheen, Maitham A., Al-Saedy, Rehab N. & Wulff, Angela, 2022, Fallacia fawensis sp. nov., a new brackish water diatom (Bacillariophyceae) from Southern Iraq, pp. 71-78 in Phytotaxa 550 (1) on page 73, DOI: 10.11646/phytotaxa.550.1.5, http://zenodo.org/record/663069
Figs 2–9 in Two new marine species of Cocconeis (Bacillariophyceae) from the west coast of Sweden
No full textFigs 2–9. LM images. 2–4. RV of C. magnoareolata Al-Handal, Riaux-Gob., R.Jahn & A.K.Wulff sp. nov., showing variations in size and valve outline (BGBM, slide B 40 0043104). 5–7. SV of C. magnoareolata sp. nov. (BGBM, slide B 40 0043104). 8–9. SV and RV of C. arenicola Ryznik (ANSP, slide no. 62634). Scale bars: 10 µm.Published as part of Al-Handal, Adil Y., Riaux-Gobin, Catherine, Jahn, Regine, Wulff, Angela Katarina & Minerovic, Alison, 2019, Two new marine species of Cocconeis (Bacillariophyceae) from the west coast of Sweden, pp. 1-16 in European Journal of Taxonomy 497 on page 5, DOI: 10.5852/ejt.2019.497, http://zenodo.org/record/265161
Cocconeis arenicola Al-Handal & Riaux-Gob. 1973
No full textCocconeis arenicola Riznyk emend. Al-Handal & Riaux-Gob. Figs 8–9 Emended description Valve elliptical with broadly rounded apices, 24.6 × 17.7–17.9 µm. SV with narrow and linear axial area (sternum) and small round central area. Striae radiate, equidistant, composed of large and round areolae, 9–9.8 in 10 µm. Areolae 16–18 in 10 µm. Short marginal striae of smaller areolae are present. RV with straight raphe, proximal raphe endings close to each other, distal endings terminate very shortly before apices. Striae radiate, equidistant with rounded areolae, 12–16 in 10 µm.Published as part of Al-Handal, Adil Y., Riaux-Gobin, Catherine, Jahn, Regine, Wulff, Angela Katarina & Minerovic, Alison, 2019, Two new marine species of Cocconeis (Bacillariophyceae) from the west coast of Sweden, pp. 1-16 in European Journal of Taxonomy 497 on page 12, DOI: 10.5852/ejt.2019.497, http://zenodo.org/record/265161
FIGURES 11–14 in Fallacia fawensis sp. nov., a new brackish water diatom (Bacillariophyceae) from Southern Iraq
No full textFIGURES 11–14: Fallacia fawensis Al-Handal, Al-Shaheen, Al-Saedy & Wulff sp. nov. Figs 11,13 SEM external valve face showing raphe sterna and valve mantle. Fig. 12 SEM upper part of the valve external face exhibiting the narrowing raphe sterna near valve apex (arrow). Fig. 14 SEM detail of the external valve face showing structure of the conopeum and the polar elongated pores of the lyre canal (arrows). Scale bars = 1 μm for Figs 11,13, 0.2 μm for Fig. 12, 0.4 μm for Fig. 14.Published as part of Al-Handal, Adil Y., Al-Shaheen, Maitham A., Al-Saedy, Rehab N. & Wulff, Angela, 2022, Fallacia fawensis sp. nov., a new brackish water diatom (Bacillariophyceae) from Southern Iraq, pp. 71-78 in Phytotaxa 550 (1) on page 74, DOI: 10.11646/phytotaxa.550.1.5, http://zenodo.org/record/663069
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
FIGURES 14–21 in Mastogloia jahniae sp. nov., a new diatom (Bacillariophyceae) from the Baltic Sea coast of Sweden
No full textFIGURES 14–21. SEM micrographs of Mastogloia jahniae sp. nov. Fig. 14. External view of the valve showing sinuous raphe branches and central area (arrowhead). Fig. 15. External view of the central area showing the elongated areolae around the central area. Fig. 16. External view of apex with hyaline area and hooked terminal raphe fissure. Fig. 17. Internal valve view showing partectal ring, siliceous ribs and partectal ducts (arrowhead). Fig. 18. Internal view showing central nodule. Fig. 19. Internal view of apex showing cleft and lacuna. Fig. 20. Partectal ring showing ornamentations and crater-like pore (arrowhead). Fig. 21. Internal view of apex showing septum. Scale bars in Figs 14–17, 5 µm, Figs 18, 20, 1 µm, Figs 19, 21, 2 µm.Published as part of Al-Handal, Adil Y., Wulff, Angela & Pennesi, Chiara, 2021, Mastogloia jahniae sp. nov., a new diatom (Bacillariophyceae) from the Baltic Sea coast of Sweden, pp. 121-128 in Phytotaxa 484 (1) on page 124, DOI: 10.11646/phytotaxa.484.1.6, http://zenodo.org/record/542130
Figs 28–36 in Two new marine species of Cocconeis (Bacillariophyceae) from the west coast of Sweden
No full textFigs 28–36. SEM images of C. vrangoensis Al-Handal & Riaux-Gob. sp. nov. (BGBM, slide B 40 0043105). 28–29. Internal view of the SV. 30. External view of the SV. 31. Enlarged section of the marginal part of showing areola structure. 32. Areolae occluded by hymenes, internal side. 33. Radial arrangement of areolae, external side. 34. Advalvar side of the valvocopula showing shape of fimbria. 35. Abvalvar side of valvocopula. 36. Closed and strong valvocopula with fimbriae.Published as part of Al-Handal, Adil Y., Riaux-Gobin, Catherine, Jahn, Regine, Wulff, Angela Katarina & Minerovic, Alison, 2019, Two new marine species of Cocconeis (Bacillariophyceae) from the west coast of Sweden, pp. 1-16 in European Journal of Taxonomy 497 on page 10, DOI: 10.5852/ejt.2019.497, http://zenodo.org/record/265161
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