Trigonostomum setigerum, Schmidt, 1852

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, Zoological Journal of the Linnean Society 141 (2), pp. 271-296 : 290-291

publication ID

https://doi.org/ 10.1111/j.1096-3642.2004.00124.x

DOI

https://doi.org/10.5281/zenodo.5113393

persistent identifier

https://treatment.plazi.org/id/038287E2-7E54-FFDC-FC92-FA594A723A5A

treatment provided by

Carolina

scientific name

Trigonostomum setigerum
status

 

TRIGONOSTOMUM SETIGERUM SCHMIDT, 1852 View in CoL

( FIGS 5C View Figure 5 , 8B, D View Figure 8 , 9C View Figure 9 , 10C; TABLE View Figure 10 1)

Alternative species name: trigonostomum-setigerum

Trigonostomum setigerum Schmidt, 1852: 500 View in CoL , t. 47, fig. 13; Diesing, 1862: 229; Graff, 1905: 113–114, t. 3, figs 17–21; Micoletzky, 1910: 173; Southern, 1912: 3, 9; Graff, 1913: 303–305, figs 263, 264; Southern, 1915: 34; Meixner, 1924a: 202–203; 1924b: 89, 90, 92, 93–94, 96, 99–101, 102, figs 1, 2, 5; 1925: 256; 1926: 577; Steinböck, 1933: 10–11; Southern, 1936: 45, 57; Meixner, 1938: 25, 114, fig. 23; Westblad, 1952: 30–31; Ax, 1959: 97; Riedl, 1959: 319–322, fig. 6; Den Hartog, 1964: 375; Karling, 1978: 231, figs 27, 28; 1986: 209–210, figs 39, 40, 47,48; Ax & Armonies, 1990: 100.

Trigonostomum setigerum setigerum Graff, 1905: 113 View in CoL , t. 3, figs 19–21; 1913: 305.

Trigonostomum setigerum album Graff, 1905: 114 View in CoL , t.3, figs 17, 18; 1913: 305.

Trigonostomum setigerum lunulatum Graff, 1905: 114 View in CoL ; 1913: 305.

Spiroclytus nisus Schmidt, 1857: 356, 365, t. 3, fig. 8; Diesing, 1862: 225.

Spiroclytus euryalus Schmidt, 1857: 356 View in CoL , 365, t. 3, fig. 8.

Spiroclytus setigerus Claparède, 1863: 15 .

Vortex ornatus Uljanin, 1870 View in CoL :, 18, t. 4, fig. 15.

Hyporhynchus setigerus Graff, 1882: 338–339 , t. 9, figs 6–14, t. 11, fig. 27; Pereyaslawzewa, 1893: 267, t.4, fig. 29, t. 10, figs 60a- e, 63d; Fuhrmann, 1898: 459; Sekera, 1901: 81; Sabussow, 1905: 488.

Known distribution: Mediterranean Sea ( Schmidt, 1852,, 1857; Graff, 1905; Sabussow, 1905; Micoletzky, 1910; Meixner, 1925; Steinböck, 1933; Riedl, 1959), Adriatic Sea ( Meixner, 1925, 1926), Black Sea ( Uljanin, 1870; Pereyaslawzewa, 1893; Graff, 1905; Ax, 1959), Sea of Marmara ( Ax, 1959), northern Atlantic Ocean ( Fuhrmann, 1898; Graff, 1905; Southern, 1912, 1915, 1936; Karling, 1978), North Sea ( Meixner, 1924b), southern Atlantic Ocean ( Westblad, 1952).

New localities: France, Corsica, Port de la station Stareso , on algae, 10 April, 9 May and 19 October 1982 ; Punta Reveletta , on algae, 11 May and 22 October 1982 . France, Banyuls, Ile Gros , on green algae near the jetty behind the station, 20–23 June 2000 . Greece, Perea , east side of the beach, coarse-grained detritus-rich sand mixed with shell gravel; on green and red algae, 22 July 2002 ; on green algae and seagrasses, ± 2 m deep, 31 July 2002. Greece, Nea Michaniona , flat exposed beach, on Enteromorpha sp. and seagrasses, 22 July 2002 . Greece, Aghias Triada , flat beach, on green algae and seagrasses ± 2.5 m deep, 22 July 2002 and 6 August 2002 (type locality) . Greece, Nea Fokea ( Kassandra Peninsula ), heavily exposed beach, on algae, 28 July 2002 . United Kingdom, Plymouth, Wembury , tidepool, 21 July 1949 , Westblad (coll. SMNH) . Kenya, Tiwi , on algae, 6 October 1991 .

Material examined: Several specimens studied alive. Neotype ( LUC no. 230) from Greece. Whole mounts from Banyuls (2), Bermuda ( SMNH, no. 46460), Corsica (5), Falkland ( SMNH, nos. 46429, 46430, 46440), Greece (26), Kenya (1), Plymouth ( SMNH, no. 46452) and South Georgia ( SMNH, no. 46448). Serially sectioned specimens from Falkland ( SMNH, nos. 46431– 9, 46441–4), Plymouth ( SMNH, nos. 46449–51), South Georgia ( SMNH, nos. 46445–7) and Greece.

Diagnosis: Trigonostomum species with coiled copulatory organ, with two whole spires. Stylet 284– 498 Mm long, enveloped by the mantle over its entire length. Mantle distally split into two spiny plates with terminal hook. Bursal appendage 64–161 Mm long, with two tubules, proximally curved over 360∞.

Remarks: Graff (1905, 1913) recognized three subspecies, based on the pattern of pigmentation: T. setigerum setigerum (with dorsal stripe), T. setigerum lunulatum (with a rostral spot between the eyes) and T. setigerum album (without pigmentation). The validity of these subspecies was questioned by Southern (1912). Observations on a large number of live animals from one population in Greece showed that the three subspecies occurred sympatrically and that the difference between these three is not always clear. For example, specimens with a rostral spot (T. s. lunulatum of Graff, 1905) showed a large variation in size of the spot, making the difference with T. s. album very small. There is also variation in the length and width of the dorsal stripe: some individuals have a short dorsal stripe, which is broader between the eyes, while in other specimens the dorsal stripe is long and very broad over its whole length, giving it a network-like appearance. Based on the occurrence of all forms in one population ( Greece, Thessaloniki), the lack of other distinctive features and the large variation of the three ‘forms’, the three subspecies are synonymized with T. setigerum .

SMNH

Department of Paleozoology, Swedish Museum of Natural History

Kingdom

Animalia

Phylum

Platyhelminthes

Class

Rhabditophora

Order

Rhabdocoela

Family

Trigonostomidae

Genus

Trigonostomum

Loc

Trigonostomum setigerum

Willems, Wim R., Artois, Tom J., Vermin, Wouter A. & Schockaert, Ernest R. 2004
2004
Loc

Trigonostomum setigerum setigerum Graff, 1905: 113

von Graff L 1905: 113
1905
Loc

Trigonostomum setigerum album

von Graff L 1905: 114
1905
Loc

Trigonostomum setigerum lunulatum

von Graff L 1913: 305
von Graff L 1905: 114
1905
Loc

Hyporhynchus setigerus

Sabussow H 1905: 488
Sekera E 1901: 81
Fuhrmann O 1898: 459
Pereyaslawzewa S 1893: 267
von Graff L 1882: 339
1882
Loc

Spiroclytus setigerus Claparède, 1863: 15

Claparede ARE 1863: 15
1863
Loc

Spiroclytus euryalus

Schmidt O 1857: 356
1857
Loc

Trigonostomum setigerum

Ax P & Armonies W 1990: 100
Karling TG 1978: 231
Den Hartog C 1964: 375
Ax P 1959: 97
Riedl R 1959: 319
Westblad E 1952: 30
Meixner J 1938: 25
Southern R 1936: 45
Steinbock O 1933: 10
Meixner J 1924: 202
Meixner J 1924: 89
Southern R 1915: 34
von Graff L 1913: 303
Southern R 1912: 3
Micoletzky H 1910: 173
von Graff L 1905: 113
Diesing KM 1862: 229
Schmidt O 1852: 500
1852
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