The genus Tomellana (Mollusca: Gastropoda: Clavatulidae) in West Africa
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1 The genus Tomellana (Mollusca: Gastropoda: Clavatulidae) in West Africa
2 History: - William Swainson (1840): introduction of the genus Tomella: Shell fusiform, smooth;.; inner lip with a thick callosity at the top; the slit short and wide. - systematic treatment of CLAVATULIDAE very controversial in literature; - Weinkauff ( ) avoids a classification of the PLEUROTOMIDAE : all species, now known as Tomellana, are classified as Clavatula ; - Tryon (1884): groups the genera Clavatula (with the subgenera Perrona and Clionella), Pusionella and Surcula in the subfamily Clavatulinae; no distinction between Tomella and Pusionella;
3 - P. Fischer (1887): Pusionella and Surcula become independent taxa; - Cossmann (1896) moves Pusionella to the family TEREBRIDAE; - Strebel (1912): Clavatula, Perrona and Tomella are similar and belong the same group, but Perrona and Tomella had to be recognised as separate genera or subgenera ( Gruppe ); new description for the genera Tomella and Perrona.
4 Family CLAVATULIDAE Genus Tomellana Wenz, 1943 Typetaxon: Clavatula lineata Lamarck, Bouchet et al. (2011): Tomella is a subgenus of Perrona Schumacher, 1817; - the genus Tomella W. Swainson, 1840 is now considered as a junior homonym of Tomella Robineau-Desvoidy, 1830 [Diptera] and it is substituted by Tomellana Wenz, 1943; - WoRMS (August 2015): Tomellana is a separate genus in the family CLAVATULIDAE;
5 Direct child taxa: Tomellana hupferi (Strebel, 1912) Tomellana hupferi var. fusca (Strebel, 1912) Tomellana leschkei (Strebel, 1912) Tomellana lineata (Lamarck, 1816) Tomellana lineata var. gracilis (Strebel, 1912) Tomellana pfefferi (Strebel, 1912) =? Fusiturris pfefferi (Strebel, 1912)
6 Tomellana lineata (Lamarck, 1816) Measurements: mm Habitat: in sand or muddy sand. Depth: 2-40 m Geographic range: from Ivory Coast, Ghana, Nigeria, Cameroon, Gabon, Congo to Angola
7 Tomellana lineata (Lamarck, 1816) Cacuaco, N of Luanda, Angola dredged at -18 m in muddy sand
8 Cacuaco, north of Luanda, Angola - dredged at -18 m in muddy sand
9 Cacuaco, north of Luanda, Angola - dredged at -18 m in muddy sand
10 Cacuaco, north of Luanda, Angola - dredged at -18 m in muddy sand
11 Cacuaco, north of Luanda, Angola - dredged at -18 m in muddy sand
12 Cacuaco, north of Luanda, Angola - dredged at -18 m in muddy sand
13 Cacuaco, north of Luanda, Angola - dredged at -18 m in muddy sand
14 Cacuaco, north of Luanda, Angola - dredged at -18 m in muddy sand
15 Cacuaco, north of Luanda, Angola - dredged at -18 m in muddy sand
16 Tomellana lineata var. gracilis (Strebel, 1912) Measurements: mm Habitat: in muddy or sandy bottom. Depth: 7-50 m Geographic range: from Senegal, Ivory Coast, Ghana, Benin, Gabon, Congo to Angola
17 Tomellana lineata var. gracilis (Strebel, 1912) Barra do Bengo, Angola trawled at -50 m 1982
18 Barra do Bengo, Angola trawled at -50 m 1982
19 Barra do Bengo, Angola trawled at -50 m 1982
20 Pointe Noire, Congo Brazzaville dredged at -6 m December 1980
21 Trawled off Abidjan, Ivory Coast
22 Trawled off Abidjan, Ivory Coast
23 Tomellana hupferi (Strebel, 1912) Measurements: mm Habitat: in soft mud. Depth: m. Typically covered with Bryozoa Geographic range: from Senegal, Togo, Benin, Nigeria to Cameroon
24 Tomellana hupferi (Strebel, 1912) off Lagos, Nigeria N/ E dredged at a depth of 27 m in mud Atlantide Expedition, Station February 1946
25 Tomellana hupferi (Strebel, 1912)
26 Tomellana hupferi (Strebel, 1912)
27 Tomellana hupferi (Strebel, 1912)
28 Tomellana hupferi var. fusca (Strebel, 1912) Measurements: mm Habitat: in muddy sand. Depth: 6-20 m Geographic range: from Togo, Benin to Cameroon
29 Tomellana hupferi var. fusca (Strebel, 1912) (= Fusiturris kribiensis Bozzetti, 2015) Victoria, Bota, Cameroon dredged at a depth of 6 m, in muddy sand - 4 December 1985
30 Tomellana hupferi var. fusca (Strebel, 1912)
31 Fusiturris kribiensis Bozzetti, 2015
32 Fusiturris kribiensis Bozzetti, 2015
33 Tomellana leschkei (Strebel, 1912) Measurements: mm Habitat: in sand of tidal zone Geographic range: from Ghana, Gabon to Angola
34 Tomellana leschkei (Strebel, 1912) Pointe Idolo, Cap Esterias, Gabon - on rocks at low tide
35 Tomellana leschkei (Strebel, 1912) Praia Santiago, Prov. Bengo, Angola - in sand - dived at a depth of 2 m 1982
36 Tomellana leschkei (Strebel, 1912) Praia Santiago, Prov. Bengo, Angola - in sand - dived at a depth of 2 m
37 Tomellana pfefferi (Strebel, 1912) =? Fusiturris pfefferi (Strebel, 1912) Measurements: 26 mm Habitat: in soft mud. Depth: m Geographic range: from Benin to Nigeria
38 Characteristics: - very slender fusiform shell, rather glossy; - outline of last whorl slightly different, constricted from the middle to the base; - subsutural cord running as a sharp ridge; - spiral tiny striae in the subsutural zone and below the last whorl; - axial folds prominently present in the suprasutural area, especially in the body whorl; - absence of a parietal callus
39 Tomellana pfefferi (Strebel, 1912) =? Fusiturris pfefferi (Strebel, 1912 off Lagos, Nigeria N/ E - dredged at a depth of 2 m - in mud
40 Tomellana pfefferi (Strebel, 1912) =? Fusiturris pfefferi (Strebel, 1912) Atlantide Expedition, St N/ E, Nigeria dredged at -29 m in soft mud 15 February 1946
41 Tomellana pfefferi (Strebel, 1912) =? Fusiturris pfefferi (Strebel, 1912) Atlantide Expedition, St N/ E, Nigeria - dredged at 29 m - in soft mud - 15 February 1946
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