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Rhabdocoela (Platyhelminthes) from the Weddell Sea (Antarctica) with the description of eight new species
No full textIn this contribution we present eleven species of Rhabdocoela (Platyhelminthes) collected during the Antarktis VII/4 (Epos leg. 3) expedition. Six of them belong to the family Trigonostomidae (Typhloplanoida). Five of these are new to science: Trigonostomum messoplanoides n. sp., Proxenetes trispinosus n. sp., Messoplana globulifera n. sp., M. minuta n. sp. and M. spiralis n. sp. All the species can be recognised from congeneric species by the shapes of their stylets. Ceratopera axi (Riedl, 1953) Den Hartog, 1964 also was found and is discussed briefly. The other five species belong to the family Polycystididae (Eukalyptorhynchia). Three of them are new to science and belong to the genus Austrorhynchus Karling, 1952: A. magnificoides n. sp., A. antarcticus n. sp. and A. biserratus n. sp. They differ from other Austrorhynchus species in having a triangular share of the accessory organ of the male system. Particular differences in shape of the stylet and accessory organ clearly distinguish each of the new species. Unlike the other two species, A. antarcticus lacks a hook on the stylet. The genus Austrorhynchus is briefly discussed. The collected material of Gyratrix hermaphroditus Ehrenberg, 1831 and Porrocystis assimilis (Levinsen, 1879) Karling, 1952 is also briefly discussed
Rhabdocoela (Platyhelminthes) from the Weddell Sea (Antarctica) with the description of eight new species
No full textIn this contribution we present eleven species of Rhabdocoela (Platyhelminthes) collected during the Antarktis VII/4 (Epos leg. 3) expedition. Six of them belong to the family Trigonostomidae (Typhloplanoida). Five of these are new to science: Trigonostomum messoplanoides n. sp., Proxenetes trispinosus n. sp., Messoplana globulifera n. sp., M. minuta n. sp. and M. spiralis n. sp. All the species can be recognised from congeneric species by the shapes of their stylets. Ceratopera axi (Riedl, 1953) Den Hartog, 1964 also was found and is discussed briefly. The other five species belong to the family Polycystididae (Eukalyptorhynchia). Three of them are new to science and belong to the genus Austrorhynchus Karling, 1952: A. magnificoides n. sp., A. antarcticus n. sp. and A. biserratus n. sp. They differ from other Austrorhynchus species in having a triangular share of the accessory organ of the male system. Particular differences in shape of the stylet and accessory organ clearly distinguish each of the new species. Unlike the other two species, A. antarcticus lacks a hook on the stylet. The genus Austrorhynchus is briefly discussed. The collected material of Gyratrix hermaphroditus Ehrenberg, 1831 and Porrocystis assimilis (Levinsen, 1879) Karling, 1952 is also briefly discussed
"Typhloplanoida'' (Platyhelminthes : Rhabdocoela) from the Indian Ocean, with the description of six new taxa
No full textSeven typhloplanoids from the Indian Ocean are discussed; six of them are new to science. We place four of the new species within the Trigonostomidae. Gandalfia bilunata gen. nov. sp. nov. is characterized by a tubiform stylet and two semilunar structures in the afferent duct. Mahurubia clava gen. nov. sp. nov. has a gutter-shaped stylet and a club-shaped mouthpiece on the bursa. Parapharyngiella involucrum gen. nov. sp. nov. is characterized by a stylet in the form of a question mark and a bursal mouthpiece with a club-shaped and a barrel-shaped part. Poseidoplanella halleti gen. nov. sp. nov. is characterized by an unpaired ovary, a funnel-shaped stylet connected with a plate, and a small, tubular bursal mouthpiece. Furthermore, new data are given on Ceratopera axi. The two other new species belong to the Typhloplanidae. Aegira annabellae gen. nov. sp. nov., a marine species, is characterized by a box-shaped stylet and a long, pseudocuticularized ejaculatory duct. Castrada trispina sp., a freshwater species, has a copulatory bursa with three spines. Mahurubia clava gen. nov. sp. nov. and Parapharyngiella involucrum gen. nov. sp. nov. occur at Zanzibar, Tanzania. The other five species have been found on Kerguelen
Figure 11. A, T. denhartogi comb. nov. A1, 3 in Revision of Trigonostomum Schmidt, 1852 (Platyhelminthes, Typhloplanoida, Trigonostomidae) with the description of seven new species
No full textFigure 11. A, T. denhartogi comb. nov. A1, 3 copulatory organ; A2 bursal appendage (A1, 2 specimen from Curaçao; A3 specimen from New Caledonia). B, T. spinigerum sp. nov. B1 copulatory organ; B2 bursal appendage (from the holotype). Abbreviations: a-e, explained in text.Published as part of Willems, Wim R., Artois, Tom J., Vermin, Wouter A. & Schockaert, Ernest R., 2004, Revision of Trigonostomum Schmidt, 1852 (Platyhelminthes, Typhloplanoida, Trigonostomidae) with the description of seven new species, pp. 271-296 in Zoological Journal of the Linnean Society 141 (2) on page 283, DOI: 10.1111/j.1096-3642.2004.00124.x, http://zenodo.org/record/463455
Trigonostomum piriforme Graff 1905
No full textTRIGONOSTOMUM PIRIFORME (PEREYASLAWZEWA, 1893) GRAFF, 1905 Hyporhynchus piriformis Pereyaslawzewa, 1893: 266, t. 4, fig. 30. Trigonostomum piriforme Graff, 1905: 115, t. III, figs 22,23; 1913: 310, fig. 272; Meixner, 1924b: 96, 99. Distribution: Black Sea (Pereyaslawzewa, 1893; Graff, 1905) According to Graff ’s (1905) drawings and description, the copulatory organ consists of three parallel plate-like structures, but without a central stylet. The bursal appendage is described as being identical with that of T. penicillatum. This species could be identical with T. penicillatum, but observations on new material are needed.Published as part of Willems, Wim R., Artois, Tom J., Vermin, Wouter A. & Schockaert, Ernest R., 2004, Revision of Trigonostomum Schmidt, 1852 (Platyhelminthes, Typhloplanoida, Trigonostomidae) with the description of seven new species, pp. 271-296 in Zoological Journal of the Linnean Society 141 (2) on page 293, DOI: 10.1111/j.1096-3642.2004.00124.
Trigonostomum piriforme
No full textTRIGONOSTOMUM PIRIFORME (PEREYASLAWZEWA, 1893) GRAFF, 1905 Hyporhynchus piriformis Pereyaslawzewa, 1893: 266, t. 4, fig. 30. Trigonostomum piriforme Graff, 1905: 115, t. III, figs 22,23; 1913: 310, fig. 272; Meixner, 1924b: 96, 99. Distribution: Black Sea (Pereyaslawzewa, 1893; Graff, 1905) According to Graff ’s (1905) drawings and description, the copulatory organ consists of three parallel plate-like structures, but without a central stylet. The bursal appendage is described as being identical with that of T. penicillatum. This species could be identical with T. penicillatum, but observations on new material are needed.Published as part of Willems, Wim R., Artois, Tom J., Vermin, Wouter A. & Schockaert, Ernest R., 2004, Revision of Trigonostomum Schmidt, 1852 (Platyhelminthes, Typhloplanoida, Trigonostomidae) with the description of seven new species, pp. 271-296 in Zoological Journal of the Linnean Society 141 (2) on page 293, DOI: 10.1111/j.1096-3642.2004.00124.x, http://zenodo.org/record/463455
Trigonostomum TORI 2004, SP. NOV.
No full textTRIGONOSTOMUM TORI SP. NOV. (FIGS 5F, 9F, 10E; TABLE 1) Alternative species name: trigonostomum-tori sp. nov. Trigonostomum setigerum Karling, 1986: 209–210, figs 45, 46. Holotype: One whole mount, USA, California, Pacific Grove (SMNH, no. 46459; Karling, 1986). Paratypes: Two whole mounts (SMNH, nos. 46457–8; Karling, 1986). Etymology: Dedicated to Prof. Dr Tor G. Karling, who collected the material. Diagnosis: Trigonostomum species with coiled copulatory organ, with five whole spires. Stylet 683– 853 Mm long, enveloped by the mantle over its entire length. Mantle distally split into two spiny plates with terminal hook. Bursal appendage 80–106 Mm long, with two tubules, proximally curved over 270∞ and with straight distal part.Published as part of Willems, Wim R., Artois, Tom J., Vermin, Wouter A. & Schockaert, Ernest R., 2004, Revision of Trigonostomum Schmidt, 1852 (Platyhelminthes, Typhloplanoida, Trigonostomidae) with the description of seven new species, pp. 271-296 in Zoological Journal of the Linnean Society 141 (2) on page 292, DOI: 10.1111/j.1096-3642.2004.00124.x, http://zenodo.org/record/463455
Figure 7 in Revision of Trigonostomum Schmidt, 1852 (Platyhelminthes, Typhloplanoida, Trigonostomidae) with the description of seven new species
No full textFigure 7. Copulatory organs and bursal appendages of the representatives of group 1B, A, T. coronatum: A1 copulatory organ; A2 bursal appendage. (from the neotype). B, T. watsoni sp. nov. B1, 2 copulatory organ; B3 bursal appendage (B1 from the holotype; B2, 3 from the paratype). C, T. penicillatum: C1 copulatory organ; C2 bursal appendage (from the neotype). D, T. lilliei: D1, 3 copulatory organ; D2, 4 bursal appendage. [D1, 2 specimen from Australia; D3, 4 specimen from the USA (neotype = holotype of T. prytherchi)]. E, T. breitfussi: E1 copulatory organ; E2 bursal appendage; E3 section through the bursa and the bursal appendage (different specimens from Sweden; E2, 3 freehand drawings). F, T. mirabile: F1, 2 copulatory organ; F3 bursal appendage (F1, 3 from the neotype; F2 from another specimen from the Black Sea). G, T. nataschae sp. nov. G1 Copulatory organ; G2 Bursal appendage (from the holotype).Published as part of Willems, Wim R., Artois, Tom J., Vermin, Wouter A. & Schockaert, Ernest R., 2004, Revision of Trigonostomum Schmidt, 1852 (Platyhelminthes, Typhloplanoida, Trigonostomidae) with the description of seven new species, pp. 271-296 in Zoological Journal of the Linnean Society 141 (2) on page 279, DOI: 10.1111/j.1096-3642.2004.00124.x, http://zenodo.org/record/463455
Trigonostomum AUSTRALIS 2004, SP. NOV.
No full textTRIGONOSTOMUM AUSTRALIS SP. NOV. (FIGS 5D, 9D, 10D; TABLE 1) Alternative species name: trigonostomum-australis sp. nov. Holotype: Whole mount, Australia, Queensland, North Stradbroke Island, Point Lookout, algae in tidepool, 12 August 1996. Other material: Observations on live material. Two whole mounts from Australia, New South Wales, Arrawarra, on Sargassum sp., 28 August 1996 and 1 November 1997. Etymology: Reflects the species’ occurrence in the southern hemisphere. Diagnosis: Trigonostomum species with coiled copulatory organ, with three whole spires. Stylet 414– 445 Mm long, enveloped by the mantle over its entire length. Mantle distally split into two spiny plates with terminal hook. Bursal appendage 34 Mm long, proximally curved over 270∞ and with straight distal section.Published as part of Willems, Wim R., Artois, Tom J., Vermin, Wouter A. & Schockaert, Ernest R., 2004, Revision of Trigonostomum Schmidt, 1852 (Platyhelminthes, Typhloplanoida, Trigonostomidae) with the description of seven new species, pp. 271-296 in Zoological Journal of the Linnean Society 141 (2) on page 286, DOI: 10.1111/j.1096-3642.2004.00124.x, http://zenodo.org/record/463455
Trigonostomum SPINIGERUM 2004, SP. NOV.
No full textTRIGONOSTOMUM SPINIGERUM SP. NOV. (FIGS 8F, H, 11B) Alternative species name: trigonostomum-spinigerum sp. nov. Holotype: Whole mount, New Caledonia, Nouméa, Nouville, on algae in a lagoon south of the asylum, 3 August 2003 (LUC no. 231). Etymology: Refers to the spines on the mantle surrounding the stylet; spinigerum (L.) = prickly, spiny, thorny. Diagnosis: Trigonostomum species with copulatory organ 61 Mm long. Stylet 57 Mm long, proximally bent over almost 90∞. Mantle surrounds the whole stylet and carries 8–10 small spines on the convex side. Bursal appendage ± 35 Mm long, proximally funnel-shaped with two heavily coiled distal tubes, very faintly striated. Remarks: The bursal appendage is measured (and drawn) on the whole mount, in which it appeared extremely thin-walled. Therefore, the length (35 Mm) has to be interpreted as the minimum length. Furthermore, only one distal tube could be observed (two in the live individual), probably because both tubes are situated exactly above each other in the mounted specimen.Published as part of Willems, Wim R., Artois, Tom J., Vermin, Wouter A. & Schockaert, Ernest R., 2004, Revision of Trigonostomum Schmidt, 1852 (Platyhelminthes, Typhloplanoida, Trigonostomidae) with the description of seven new species, pp. 271-296 in Zoological Journal of the Linnean Society 141 (2) on page 291, DOI: 10.1111/j.1096-3642.2004.00124.x, http://zenodo.org/record/463455
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