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FIGURE 2. Typhlopolycystis caeca Karling, 1956 in On the genus Typhlopolycystis Karling, 1956 (Platyhelminthes, Kalyptorhynchia, Polycystididae), with data on the five known species and the description of eleven new species
No full textFIGURE 2. Typhlopolycystis caeca Karling, 1956. Copulatory organ (A) in the holotype and (B) of an individual from Sylt. (scale = 20 µm)Published as part of Schockaert, Ernest R., Moons, Patricia, Janssen, Toon, Tessens, Bart S., Reygel, Patrick C., Revis, Nathalie, Jouk, Philippe E. H., Willems, Wim R. & Artois, Tom J., 2019, On the genus Typhlopolycystis Karling, 1956 (Platyhelminthes, Kalyptorhynchia, Polycystididae), with data on the five known species and the description of eleven new species, pp. 81-104 in Zootaxa 4603 (1) on page 85, DOI: 10.11646/zootaxa.4603.1.4, http://zenodo.org/record/267330
Coelogynopora schockaerti n. sp. (Proseriata: Coelogynoporidae), a remnant of a platyhelminth coldwater fauna in the northwestern Mediterranean?
No full textJouk, Philippe E.H., Revis, Nathalie J.P., Artois, Tom (2019): Coelogynopora schockaerti n. sp. (Proseriata: Coelogynoporidae), a remnant of a platyhelminth coldwater fauna in the northwestern Mediterranean? Zootaxa 4686 (3): 409-418, DOI: https://doi.org/10.11646/zootaxa.4686.3.
FIGURE 2. Limipolycystis sicilicula n in New species of Limipolycystis Schilke, 1970 (Rhabdocoela: Kalyptorhynchia: Polycystididae) from the Western Mediterranean
No full textFIGURE 2. Limipolycystis sicilicula n. sp. (A) Male atrial organs (holotype). (B) Stylet (accessory stylet type II; paratype). Limipolycystis falx n. sp. (C–E) Stylet (accessory stylet type II; C from the holotype); inset in C: seminal receptacle. Scale bars = 20 µm. Arrows indicate the proximal gutter-shaped projection of the stylet.Published as part of Artois, Tom, Willems, Wim, Revis, Nathalie, Martens, Paul & Schockaert, Ernest, 2012, New species of Limipolycystis Schilke, 1970 (Rhabdocoela: Kalyptorhynchia: Polycystididae) from the Western Mediterranean, pp. 26-36 in Zootaxa 3325 on page 29, DOI: 10.5281/zenodo.20953
FIGURE 1. Brunetorhynchus deconincki n. gen. n in A new genus with six new species of Typhlopolycystidinae Evdonin, 1977 (Platyhelminthes, Kalyptorhynchia, Polycystididae)
No full textFIGURE 1. Brunetorhynchus deconincki n. gen. n. sp. (A) The living animal as drawn by M. Brunet. (B) Reconstruction of the atrial organs from sagittal sections, seen from the right. (C, D) The seminal receptacle in two individuals (from whole mounts). (E–H) The stylet: (E, G) of the holotype, (F) of another individual from the Bay of Marseille, (H) of an individual from Calvi. (I) Some atrial organs as seen in the whole mount of a third individual from the Bay of Marseille. Note the globular aspect of the female duct in this specimen and the longitudinal muscles in bundles. (scale bars = 25 µm)Published as part of Schockaert, Ernest R., Martens, Paul M., Revis, Nathalie, Janssen, Toon, Willems, Wim & Artois, Tom J., 2014, A new genus with six new species of Typhlopolycystidinae Evdonin, 1977 (Platyhelminthes, Kalyptorhynchia, Polycystididae), pp. 259-272 in Zootaxa 3755 (3) on page 261, DOI: 10.11646/zootaxa.3755.3.4, http://zenodo.org/record/22926
On the genus Lagenopolycysitis Artois and Schockaert, 2000 (Platyhelminthes, Kalyptorhynchia, Polycystididae), with the description of six new species
No full textMeiofauna, broadly defined as those organisms able to pass through a 1-mm sieve but retained by a 45-μm mesh, comprise a highly diverse assemblage of invertebrates. Despite their high diversity and abundance, their ubiquitous presence across the globe, and their important role in ocean health and ecosystem functioning, these animals are frequently overlooked in biodiversity assessments. A prime example of such an understudied group is Rhabdocoela Ehrenberg, 1831, a highly speciose and ecologically diverse group of flatworms with over 1500 species found worldwide. As top predators, these microturbellarians are assumed to play a key role in meiofaunal ecosystems, yet many species remain undescribed to date.
This study focuses on Lagenopolycystis, a rhabdocoel genus originally described in 1965, which currently includes only two described species. By combining results from over 30 years of marine sampling campaigns across Europe and Eastern Africa conducted by our research group, we now present an updated description of the genus, followed by a redescription of the type species Lagenopolycystis peresi Brunet, 1965, and L. mandelai Willems & Artois, 2017. Additionally, we describe a total of six species new to science. The new species are mainly distinguished from each other and other representatives of Lagenopolycystis by the organization of their reproductive systems. Comments on the genus' distribution and phylogeny are provided. Our findings contribute to our understanding of microturbellarian diversity, and underscore the need for continued exploration and description of meiofaunal species by future researchers.We gratefully acknowledge the Ministerio de Educación y Ciencia and Estación Biológica de Doñana (ICTS-RBD, Spain) for supporting fieldwork in Doñana National Park. The Algarve expedition was supported by the EU FP7 ASSEMBLE grant agreement no. 227799, in collaboration with the Centro de Ciências do Mar, University of the Algarve. We thank Dr Katrine Worsaae, Dr Alejandro Martínez, and all participants of the 2011 Lanzarote workshop for their assistance with sampling. We also thank the Meiozores workshop (2019) organisers and the Azores Regional Government (grant M3.3.B/ORG.R.C./020/2019). Special thanks to Dr Marco Curini-Galletti for hosting our team in Sardinia and aiding in sampling. This research was supported by EMBRC Belgium—FWO project GOH3817N. We also thank Mrs. Ria Vanderspikken and Mrs. Natascha Steffanie for their lab assistance at Hasselt Universi
FIGURE 8. Typhlopolycystis mediterranea Brunet, 1965 in On the genus Typhlopolycystis Karling, 1956 (Platyhelminthes, Kalyptorhynchia, Polycystididae), with data on the five known species and the description of eleven new species
No full textFIGURE 8. Typhlopolycystis mediterranea Brunet, 1965. Copulatory organ (A) of the syntype indicated as holotype (SMNH typ 2703), (B) of an individual from the Kristineberg area and (C) of an individual from Cerbère (S. France). (scale = 20 µm)Published as part of Schockaert, Ernest R., Moons, Patricia, Janssen, Toon, Tessens, Bart S., Reygel, Patrick C., Revis, Nathalie, Jouk, Philippe E. H., Willems, Wim R. & Artois, Tom J., 2019, On the genus Typhlopolycystis Karling, 1956 (Platyhelminthes, Kalyptorhynchia, Polycystididae), with data on the five known species and the description of eleven new species, pp. 81-104 in Zootaxa 4603 (1) on page 91, DOI: 10.11646/zootaxa.4603.1.4, http://zenodo.org/record/267330
FIGURE 1 in On the genus Typhlopolycystis Karling, 1956 (Platyhelminthes, Kalyptorhynchia, Polycystididae), with data on the five known species and the description of eleven new species
No full textFIGURE 1. Generalised anatomy of a species of Typhlopolycystis. (A) General construction. (B) Female atrial organs. (C) Male atrial organs. (D-G) The different types of copulatory organ in species of Typhlopolycystis. (scale = 20 µm)Published as part of Schockaert, Ernest R., Moons, Patricia, Janssen, Toon, Tessens, Bart S., Reygel, Patrick C., Revis, Nathalie, Jouk, Philippe E. H., Willems, Wim R. & Artois, Tom J., 2019, On the genus Typhlopolycystis Karling, 1956 (Platyhelminthes, Kalyptorhynchia, Polycystididae), with data on the five known species and the description of eleven new species, pp. 81-104 in Zootaxa 4603 (1) on page 84, DOI: 10.11646/zootaxa.4603.1.4, http://zenodo.org/record/267330
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
Limipolycystis falx Artois, Willems, Revis, Martens & Schockaert, 2012, n. sp.
No full textLimipolycystis falx n. sp. Artois, Willems & Schockaert (Figs 1 E–F, 2 C–E) Holotype. A whole mount, France, Bay of Marseille, near Cap Morgiou, coarse-grained sand, 67 m deep, 7 October 1967 (SMNH Type- 8313). Other material. One whole mount, France, Bay of Marseille, Cap Canaille, near Cassis, 16 m deep, finegrained sand, 8 October 1966 (HU V. 2.43). Two whole mounts, France, Bay of Marseille, localities in the bay proper (exact locations unknown), gravel with muddy sand, 32–47 m deep, 30 December 1966 and 26 July 1967 (HU V. 2.44–45). Etymology. Species name refers to the stylet, which has the shape of a scythe. Falx (Lat.): scythe. Diagnosis. Species of Limipolycystis with two eyes. Prostate vesicle of type III, well developed. Stylet an accessory stylet type II, 76–86 µm long, scythe shaped, proximally with gutter-like projection. Seminal receptacle consisting of a funnel-like, a vesicular and a tubular part. Description. The animals are very small, approximately 0.3–0.4 mm long (measured on whole mounts). They are colourless with two eyes. As far as could be seen on the live animals and the whole mounts, the internal organization is identical to that of L. sicilicula n. sp. The stylet is 76–86 µm long (x = 81 µm; n = 4) and is slightly curved over its whole length, giving the overall appearance of a scythe (Fig. 1 E; 2 C–E). Proximally it carries an elongated gutter-like projection that sits on the convex side of the stylet (indicated with an arrow in Figs 1 E, 2 C–F), guarding the opening, which is orientated towards the concave side. The seminal receptacle (Figs 1 F, 2 C) consists of a funnel-like structure, connected to the bursa, a small vesicle and a sclerotised tube, connected to the proximal part of the oviduct.Published as part of Artois, Tom, Willems, Wim, Revis, Nathalie, Martens, Paul & Schockaert, Ernest, 2012, New species of Limipolycystis Schilke, 1970 (Rhabdocoela: Kalyptorhynchia: Polycystididae) from the Western Mediterranean, pp. 26-36 in Zootaxa 3325 on pages 30-31, DOI: 10.5281/zenodo.20953
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