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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
Studie naar de Ecologie van de Vrijlevende Plathelminthes (Turbellaria) van de Zandstranden van de Belgische Kust
No full textTot op heden was het Turbellaria-onderzoek aan de Belgische kust voornamelijk faunistisch, waarbij ook een aantal karyologische aspecten onderzocht werden (Martens, 1983; 1984; Martens & Schockaert, 1981; Martens et al., 1988). Dit onderzoek is de eerste ecologische studie waarbij op systematische wijze over een langere periode bemonsterd werd. Het doel van dit onderzoek is drieledig : 1) Een eerste doelstelling is bet nagaan van bet relatieve aandeel van de Turbellaria in de meiofauna in functie van de dynamiek van bet (eulitorale) zandige biotoop, en dit zowel wat betreft hun densiteit als bun biomassa. Met de term "dynamiek" wordt niet enkel de hydrodynamiek bedoeld, maar bet geheel van de factoren die een invloed op bet biotoop kunnen uitoefenen. Algemeen wordt immers aanvaard dat de Nematoda en de Harpacticoida meestal de dominante taxa zijn in de meiofauna. Doorgaans bereiken de Nematoda maximale densiteiten in de fijnere sedimenten en zijn er dan super-dominant, terwijl de Harpacticoida meestal in de grovere sedimenten in hoge aantallen voorkomen en er soms zelfs bet meest dominante taxon vormen (Platt & Warwick, 1980 en Hicks & Coull, 1983 met referenties). Voor de zgn. "soft-bodied" meiofaunataxa (vnl. Turbellaria en Gastrotricha) zijn de gegevens echter veel schaarser. Meestal wordt aangenomen dat deze taxa slechts in zeer lage densiteiten voorkomen en in vele meiofauna-surveys warden ze zelfs helemaal niet in beschouwing genomen, waarschijnlijk ook mede doordat ze veel moeilijker te bestuderen zijn dan de "hard-bodied" taxa. Martens et al. (1985) en Martens & Schockaert (1986) suggereren echter dat de Turbellaria een belangrijkere rol in de meiobenthosgemeenschap kunnen spelen dan algemeen verondersteld wordt en dat bun aandeel in de meiofauna voornamelijk beïnvloed wordt door de dynamiek van bet biotoop. Uit literatuurstudie en eigen waarnemingen blijkt dat in zandige biotopen de diversiteit, densiteit en biomassa van Turbellaria doorgaans hoger is dan in modderige bodems. Volgende hypothese werd vooropgesteld (Martens et al., 1985) : "Hoe hoger de dynamiek van een zandig habitat, hoe lager de totale meiofaunadensiteit, maar hoe hoger bet (relatieve) aandeel van de Turbellaria in de meiofauna" (zie figuur 1). Om deze hypothese te toetsen warden een aantal lokaliteiten gekozen, die een zo breed mogelijke "range" van biotopen vertegenwoordigen, nl. van zeer beschut tot volledig geëxposeerd aan de golfslag (de belangrijkste hydrodynamische factor voor de eulitorale meiofauna), met daarbij voor sommige stations nog extra stresserende factoren voor de meiofauna die de dynamiek van het biotoop nog verhogen. 2) Naast de kwantitatieve aspecten in de meiofauna komen ook belangrijke kwalitatieve aspecten aan bod. De samenstelling van de turbellarienfauna in elk biotoop wordt bepaald, waaruit volgende gegevens kunnen worden af geleid : - Is er een relatie te leggen tussen de faunasamenstelling en de abiotische factoren (vnl. de sedimentsamenstelling)? - Kunnen er voor de verschillende biotopen karakteristieke ("gids")soorten aangeduid worden? 3) Een laatste bedoeling is de temporele evolutie van de turbellarienfauna in de verschillende biotopen vast te stellen. Daar er kwantitatieve gegevens tot op soortniveau voorhanden zijn, wordt bet ook mogelijk de levenscyclus van de meest abundante turbellariensoorten te reconstrueren
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 15 in Taxonomy and phylogeny of Koinocystididae (Platyhelminthes, Kalyptorhynchia) with the description of three new genera and twelve new species
No full textFIGURE 15. Reinhardorhynchus tahitiensis sp. n.. A, general organisation (from a live animal). B–C, sclerotised structures of the copulatory bulb (from the holotype). D, sagittal reconstruction of the genital system from the left hand side. C with proximal end toward top of figure, B with proximal end toward left of figure.Published as part of Diez, Yander L., Monnens, Marlies, Aguirre, Rosa Isabel, Yurduseven, Rana, Jouk, Philippe, Van Steenkiste, Niels W. L., Leander, Brian S., Schockaert, Ernest, Reygel, Patrick, Smeets, Karen & Artois, Tom, 2021, Taxonomy and phylogeny of Koinocystididae (Platyhelminthes, Kalyptorhynchia) with the description of three new genera and twelve new species, pp. 451-500 in Zootaxa 4948 (4) on page 481, DOI: 10.11646/zootaxa.4948.4.1, http://zenodo.org/record/462923
Simplexcystis Diez, Reygel & Artois 2021, gen. n.
No full textSimplexcystis Diez, Reygel & Artois gen. n. urn:lsid:zoobank.org:act: 27A436A5-2FD7-4059-A2D3-F75FF5104526Published as part of Diez, Yander L., Monnens, Marlies, Aguirre, Rosa Isabel, Yurduseven, Rana, Jouk, Philippe, Van Steenkiste, Niels W. L., Leander, Brian S., Schockaert, Ernest, Reygel, Patrick, Smeets, Karen & Artois, Tom, 2021, Taxonomy and phylogeny of Koinocystididae (Platyhelminthes, Kalyptorhynchia) with the description of three new genera and twelve new species, pp. 451-500 in Zootaxa 4948 (4) on page 488, DOI: 10.11646/zootaxa.4948.4.1, http://zenodo.org/record/462923
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
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
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 12. Typhlopolycystis riegeri n 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 12. Typhlopolycystis riegeri n. sp. (A) The atrial organs in the living animal. (B) The copulatory organ in the holotype. (C) The copulatory organ in the paratype. Typhlopolycystis tahitiensis n.sp. (D) The copulatory organ in the holotype. (E-F) The copulatory organ in two syntypes from Tahiti (G). The copulatory organ in an individual from Rangiroa. (H) The atrial organs in the whole mount of a syntype. Typhlopolycystis australiensis n.sp. (I) The copulatory organ in the holotype and (J) its seminal receptacle. (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 96, DOI: 10.11646/zootaxa.4603.1.4, http://zenodo.org/record/267330
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