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Malmgreniella lilianae Pettibone 1993
No full textMalmgreniella lilianae Pettibone, 1993 (®gure 1A±J) Malmgreniella lilianae Pettibone, 1993: 59, ®gure 38.Published as part of Barnich, R. & Fiege, D., 2001, Mediterranean species of Malmgreniella Hartman, 1967 Polychaeta: Polynoidae: Polynoinae), including the description of a species, pp. 1119-1142 in Journal of Natural History 35 on page 112
A new genus and species of Polynoidae (Annelida, Polychaeta) from Pine Island Bay, Amundsen Sea, Southern Ocean-a region of high taxonomic novelty
No full textNeal, L., Barnich, R., Wiklund, H (2012): A new genus and species of Polynoidae (Annelida, Polychaeta) from Pine Island Bay, Amundsen Sea, Southern Ocean-a region of high taxonomic novelty. Zootaxa 3542: 80-88, DOI: 10.11646/zootaxa.3542.1.
Neolagisca Barnich & Fiege 2000, gen. nov.
No full text<i>Neolagisca</i> gen. nov. <p> <i>Type species</i>: <i>Lagisca drachi</i> Reyss, 1961.</p> <p> <i>Diagnosis.</i> Fifteen pairs of elytra, more or less covering body. Prostomium with distinct cephalic peaks; median antenna in anterior notch, lateral antennae inserted ventrally. Parapodia biramous; neuropodia with digitiform supra-acicular process; tips of noto- and neuroacicula penetrating epidermis. Notochaetae stout, with distinct rows of spines and of two kinds: stout with blunt tips and slender with sharp,</p>Published as part of <i>Barnich, R. & Fiege, D., 2000, Revision of the Mediterranean species of Harmothoe Kinberg, 1856 Lagisca Malmgren, 1865 (Polychaeta: Polynoidae: Polynoinae) descriptions of a new genus and a new species, pp. 1889-1938 in Journal of Natural History 34</i> on page 193
FIGURE 1 in A new genus and species of Polynoidae (Annelida, Polychaeta) from Pine Island Bay, Amundsen Sea, Southern Ocean-a region of high taxonomic novelty
No full textFIGURE 1. Pine Island Bay and the position of epibenthic sledge stations sampled during the BIOPEARL 2 (JR 179) cruise. (modified from Kaiser et al. (2009)Published as part of <i>Neal, L., Barnich, R. & Wiklund, H, 2012, A new genus and species of Polynoidae (Annelida, Polychaeta) from Pine Island Bay, Amundsen Sea, Southern Ocean-a region of high taxonomic novelty, pp. 80-88 in Zootaxa 3542</i> on page 81, DOI: 10.11646/zootaxa.3542.1.4, <a href="http://zenodo.org/record/10096794">http://zenodo.org/record/10096794</a>
Polynoid polychaetes living in the gut of irregular sea urchins: a first case of inquilinism in the Southern Ocean
No full textAbstractMany different polychaete-echinoderm relationships have been described, from tropical to polar environments. Most of these associations have been generally defined as ‘commensal’, with polychaetes guests usually found on the oral surface of their hosts or, in a very few cases, even inside the host's body. Here we present an inquilinistic association involving two Antarctic species, the polychaete Gorekia crassicirris (Willey, 1902) (Polynoidae) and the irregular sea urchin Abatus nimrodi (Koheler, 1911) (Schizasteridae) found in the Ross Sea. This record is only the second worldwide for this kind of association, after that of the polychaete Benthoscolex cubanus which lives in the gut of the spatangoid Archeopneustes hystrix in Caribbean waters. Gorekia crassicirris seems to be a polyxenous species as it was also observed on another schizasterid, Brachysternaster chescheri Larrain, 1985 in the Weddell Sea. Considering that A. nimrodi is absent from that area and that the two sea urchin species have a disjoint distribution, it is possible that a ‘host-switch’ phenomenon occurred at some stage. We review the available literature to compare the Antarctic pairing with the other known examples of similar associations.</jats:p
FIGURE 3. Austropolaria magnicirrata n. gen. n in A new genus and species of Polynoidae (Annelida, Polychaeta) from Pine Island Bay, Amundsen Sea, Southern Ocean-a region of high taxonomic novelty
No full textFIGURE 3. Austropolaria magnicirrata n. gen. n. sp., holotype NHM 2012.92 (a) live specimen, dorsal view; (b) preserved specimen, dorsal view; (c) detail of prostomium in dorsal view, style of medina antenna and styles of tentacular cirri missing, damaged; (d) extended pharynx with proboscisidial papillae; (e) pygidial keel, ventral view (Scales: A–C = 1 mm; D–E = 200 µm).Published as part of <i>Neal, L., Barnich, R. & Wiklund, H, 2012, A new genus and species of Polynoidae (Annelida, Polychaeta) from Pine Island Bay, Amundsen Sea, Southern Ocean-a region of high taxonomic novelty, pp. 80-88 in Zootaxa 3542</i> on page 85, DOI: 10.11646/zootaxa.3542.1.4, <a href="http://zenodo.org/record/10096794">http://zenodo.org/record/10096794</a>
Robertianella McIntosh 1885
No full textGenus <i>Robertianella</i> McIntosh, 1885 <p> <i>Type species</i>: <i>Robertianella synophthalm a</i> McIntosh, 1885.</p> <p> <i>Diagnosis.</i> Fifteen pairs of elytra, more or less covering body. Prostomium with distinct cephalic peaks; median antenna in anterior notch, lateral antennae inserted ventrally. Parapodia biramous; neuropodia without supra-acicular process; tips of notoacicula penetrating epidermis, those of neuroacicula never penetrating. Notochaetae stout, with very faint rows of spines and blunt tips; neurochaetae with very faint rows of spines only distally and with bill-shaped tips.</p> <p> <i>Description</i>. Body dorsoventrally fl attened, short, with up to 43 segments; body more or less covered by elytra or short tail uncovered (in large specimens). Fifteen pairs of elytra on segments 2, 4, 5, 7, on alternate segments to 23, 26, 29 and 32; rst pair rounded, the following oval to kidney-shaped; surface with few microtubercles; margin without papillae (fi gure 19B, C). Dorsal cirri with cylindrical cirrophores and long styles on segments lacking elytra (fi gure 19D); nodular dorsal tubercle on cirrigerous segments (fi gure 19A). Ventral cirri short (except on second segment), consisting of cirrophore and style on all segments (fi gure 19E). Nephridial papillae usually present from chaetiger 5 to the end of the body. Pygidium with one pair of anal cirri.</p> <p>Prostomium bilobed, with distinct cephalic peaks, three antennae: ceratophore</p>Published as part of <i>Barnich, R. & Fiege, D., 2000, Revision of the Mediterranean species of Harmothoe Kinberg, 1856 Lagisca Malmgren, 1865 (Polychaeta: Polynoidae: Polynoinae) descriptions of a new genus and a new species, pp. 1889-1938 in Journal of Natural History 34</i> on page 192
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
FIGURE 2. Austropolaria magnicirrata n. gen. n in A new genus and species of Polynoidae (Annelida, Polychaeta) from Pine Island Bay, Amundsen Sea, Southern Ocean-a region of high taxonomic novelty
No full textFIGURE 2. Austropolaria magnicirrata n. gen. n. sp., holotype NHM 2012.92. (A) anterior end, dorsal view; left dorsal cirrus of segment 3 and styles of median antenna and left tentacular cirri missing, parapodia of left side damaged; (B) posterior end, lateral view; parapodia not figured, styles of dorsal and anal cirri missing; (C) elongate cirrophore of segment 6, reduced elytrophore of segment 7, and conical cirrophore of segment 8, left side; (D) right cirrigerous parapodium of segment 6, posterior view; style of dorsal cirrus missing; (E) long notochaeta; (F) distal half of middle neurochaeta; (G) tip of same. (Scales A–C = 2 mm; D = 1 mm; E, F = 250 µm; G = 100 µm).Published as part of <i>Neal, L., Barnich, R. & Wiklund, H, 2012, A new genus and species of Polynoidae (Annelida, Polychaeta) from Pine Island Bay, Amundsen Sea, Southern Ocean-a region of high taxonomic novelty, pp. 80-88 in Zootaxa 3542</i> on page 84, DOI: 10.11646/zootaxa.3542.1.4, <a href="http://zenodo.org/record/10096794">http://zenodo.org/record/10096794</a>
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