1,721,307 research outputs found
Pseudonodosaria Boomgaart 1949
No full textGenus Pseudonodosaria Boomgaart, 1949 Diagnosis Test ovoid, uniserial, early chambers strongly embracing and increasing rapidly in diameter; sutures horizontal and flush; aperture terminal with radiate slits (Hayward et al. 2012).Published as part of Guðmundsson, Guðmundur, Cedhagen, Tomas & Andersen, Tom, 2022, Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters, pp. 1-74 in European Journal of Taxonomy 824 (1) on page 51, DOI: 10.5852/ejt.2022.824.1827, http://zenodo.org/record/668672
Grigelis Mikhalevich 1981
No full textGenus Grigelis Mikhalevich, 1981 Diagnosis “Test elongate, uniserial; ovoid to fusiform proloculus may be up to twice the length of the first chamber; later chambers usually, but not always separated by long narrow necks; aperture terminal, at end of a long, narrow neck, radiate bars join at center giving petalloid effect.” (Hayward et al. 2012: 139)Published as part of Guðmundsson, Guðmundur, Cedhagen, Tomas & Andersen, Tom, 2022, Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters, pp. 1-74 in European Journal of Taxonomy 824 (1) on page 34, DOI: 10.5852/ejt.2022.824.1827, http://zenodo.org/record/668672
Nodosaria Lamarck 1816
No full textGenus Nodosaria Lamarck, 1816 Diagnosis Test uniserial, sutures horizontal, perpendicular to test axis. Surface smooth or with vertical costae; aperture radiate, or circular, bordered with radial grooves (Hayward et al. 2012). Species of this genus in Icelandic waters have sub-globular to pyriform and slightly embracing chambers, resulting in a moderately nodular shape.Published as part of Guðmundsson, Guðmundur, Cedhagen, Tomas & Andersen, Tom, 2022, Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters, pp. 1-74 in European Journal of Taxonomy 824 (1) on page 40, DOI: 10.5852/ejt.2022.824.1827, http://zenodo.org/record/668672
Fig. 10 in Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters
No full textFig. 10.Grigelis guttifera (d'Orbigny, 1846) comb. nov.A, C. Microsphere with missing initial chambers (BIOICE 2853, IINH 40236a), side view (A) and detail of last chamber (C). B, D. Megalosphere (BIOICE 3264, IINH 40118), side view (B) and aperture (D) stained with indigo blue. Light source combination of incident light and dark field. Scale bars = 0.25 mm.Published as part of Guðmundsson, Guðmundur, Cedhagen, Tomas & Andersen, Tom, 2022, Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters, pp. 1-74 in European Journal of Taxonomy 824 (1) on page 37, DOI: 10.5852/ejt.2022.824.1827, http://zenodo.org/record/668672
Fig. 14. Nodosaria incerta Neugeboren, 1856. A, C in Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters
No full textFig. 14. Nodosaria incerta Neugeboren, 1856. A, C. Microsphere (BIOICE 2664, IINH 40071), side view (A), showing initial spiral end, and aperture (C). B, D. Megalosphere (BIOICE 3108, IINH 40085), side view (B) and aperture (D). Light source combination of incident light and dark field. Scale bars = 0.25 mm.Published as part of Guðmundsson, Guðmundur, Cedhagen, Tomas & Andersen, Tom, 2022, Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters, pp. 1-74 in European Journal of Taxonomy 824 (1) on page 49, DOI: 10.5852/ejt.2022.824.1827, http://zenodo.org/record/668672
Fig. 12. Nodosaria subsoluta Cushman, 1923. A in Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters
No full textFig. 12. Nodosaria subsoluta Cushman, 1923. A. Megalosphere side view (BIOICE 2868, IINH 40218). B, D. Microsphere (BIOICE 2219, IINH 40182), side view of specimen containing cytoplasm (B) and aperture (D). C, E. Megalosphere (BIOICE 2978, IINH 40347), side view (C) and aperture (E) stained with indigo blue. Light source combination of incident light and dark field. Scale bars = 0.25 mm.Published as part of Guðmundsson, Guðmundur, Cedhagen, Tomas & Andersen, Tom, 2022, Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters, pp. 1-74 in European Journal of Taxonomy 824 (1) on page 43, DOI: 10.5852/ejt.2022.824.1827, http://zenodo.org/record/668672
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
Fig. 1. Dentalina antarctica Parr, 1950. A in Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters
No full textFig. 1. Dentalina antarctica Parr, 1950. A. Side view of a young microsphere (BIOICE 2149, IINH 40405) with a spiral initial end; light source is a combination of Rotterman contrast and dark field, revealing the perforations with apparent coarse appearance. B–C. Side view (B), and apertural view (C) of megalosphere (BIOICE 2237, IINH 40408). D. Apertural view of a megalosphere (BIOICE 2697, IINH 40421). Light source in B–D is a combination of incident light and dark field. Scale bars = 0.25 mm.Published as part of Guðmundsson, Guðmundur, Cedhagen, Tomas & Andersen, Tom, 2022, Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters, pp. 1-74 in European Journal of Taxonomy 824 (1) on page 6, DOI: 10.5852/ejt.2022.824.1827, http://zenodo.org/record/668672
Nodosariinae Ehrenberg 1838
No full textSubfamily Nodosariinae Ehrenberg, 1838 Diagnosis The diagnostic characters of the family Nodosariinae are a uniserial chamber arrangement and a rectilinear to slightly arcuate test in the megalospheric generation, with a terminal aperture made of radiate slits or grooves around the margin (Hayward et al. 2012). The few and rarely encountered specimens of the microspheric generation of Dentalina antarctica Parr, 1950, Dentalina elegans d’Orbigny, 1846, Dentalina obliqua (Linnaeus,1758), and Nodosaria incerta Neugeboren, 1856 have rudiments of a planispiral arrangement of the very first initial chambers.Published as part of Guðmundsson, Guðmundur, Cedhagen, Tomas & Andersen, Tom, 2022, Taxonomy and distribution of recent species of the subfamily Nodosariinae (Foraminifera) in Icelandic waters, pp. 1-74 in European Journal of Taxonomy 824 (1) on page 4, DOI: 10.5852/ejt.2022.824.1827, http://zenodo.org/record/668672
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