Subgenus (Tectus) P. D. Montfort, 1810
(5-4-1-3-2-11-12-34-3-0-0-0-0)

acutus J. B. P. A. de Lamarck
(5-4-1-3-2-11-12-34-3-1-0-0-0)
[=Tectus (Tectus) pyramis (I. Born, 1778)]
Ref. Abbott & Dance, 1982 p 45

? architectonicus (A. Adams)
(5-4-1-3-2-11-12-34-3-2-0-0-0)
Ref. Kaicher, 1980 #2075 bw

? concavus (J. F. Gmelin)
(5-4-1-3-2-11-12-34-3-3-0-0-0)
Ref. Kaicher, 1980 #2087 bw

dentatus (P. Forskal, 1775)
(5-4-1-3-2-11-12-34-3-4-0-0-0)
Ref. Lindner, 1977 pl 5 c

fenestratus (J. F. Gmelin, 1791)
(5-4-1-3-2-11-12-34-3-5-0-0-0)
Fenestrate Top
Ref. Abbott & Dance, 1982 p 45 c
Kaicher, 1980 #2160 bw

? mauritianus (J. F. Gmelin)
(5-4-1-3-2-11-12-34-3-6-0-0-0)
Ref. Kaicher, 1980 #2133 bw

? noduliferus (J. B. P. A. de Lamarck)
(5-4-1-3-2-11-12-34-3-7-0-0-0)
Ref. Kaicher, 1980 #2122 bw

obeliscus J. F. Gmelin
(5-4-1-3-2-11-12-34-3-8-0-0-0)
[=Tectus (Tectus) pyramis (I. Born, 1778)]
Ref. Abbott & Dance, 1982 p 45

pyramis (I. Born, 1778)
(5-4-1-3-2-11-12-34-3-9-0-0-0)
Pyramid Top
Ref. Kaicher, 1980 #2132 bw
Lindner, 1977 pl 5 c
Syn. Tectus (Tectus) acutus J. B. P. A. de Lamarck;
Tectus (Tectus) obeliscus J. F. Gmelin
Ref. Abbott & Dance, 1982 p 45 c

Form noduliferus J. B. P. A. de Lamarck, 1822
(5-4-1-3-2-11-12-34-3-9-0-1-0)
Noded Pyramid Top
Ref. Abbott & Dance, 1982 p 45 c

? royanus T. Iredale
(5-4-1-3-2-11-12-34-3-10-0-0-0)
Ref. Kaicher, 1980 #2147 bw

? triserialis (J. B. P. A. de Lamarck)
(5-4-1-3-2-11-12-34-3-11-0-0-0)
Ref. Kaicher, 1980 #2154 bw

? virgatus (J. F. Gmelin)
Ref. Kaicher, 1980 #2172 bw