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Brachytoma
Taxonomy
Brachytoma was named by Swainson (1840) [Sepkoski's age data: T Eo R Sepkoski's reference number: 614]. It is extant.
It was reranked as Drillia (Brachytoma) by Vredenburg (1921), Mukerjee (1939), Dey (1961); it was reranked as Clavus (Brachytoma) by Grant, IV and Gale (1931) and Baldi (1973).
It was assigned to Drillia by Vredenburg (1921), Mukerjee (1939), Dey (1961); to Clavus by Grant, IV and Gale (1931) and Baldi (1973); to Neogastropoda by Sepkoski (2002); and to Drilliinae by Hendy (2007).
It was reranked as Drillia (Brachytoma) by Vredenburg (1921), Mukerjee (1939), Dey (1961); it was reranked as Clavus (Brachytoma) by Grant, IV and Gale (1931) and Baldi (1973).
It was assigned to Drillia by Vredenburg (1921), Mukerjee (1939), Dey (1961); to Clavus by Grant, IV and Gale (1931) and Baldi (1973); to Neogastropoda by Sepkoski (2002); and to Drilliinae by Hendy (2007).
Species
Clavus (Brachytoma) nigerrimus, Drillia (Brachytoma) annandalei, Drillia (Brachytoma) buddhaica, Drillia (Brachytoma) convexa, Drillia (Brachytoma) gautama, Drillia (Brachytoma) pinfoldi, Drillia (Brachytoma) reticulata, Drillia (Brachytoma) sarasvati, Drillia (Brachytoma) tjemoroensis, Drillia (Brachytoma) yabei
Synonymy list
| Year | Name and author |
|---|---|
| 1840 | Brachytoma Swainson |
| 1921 | Drillia (Brachytoma) Vredenburg p. 110 |
| 1931 | Clavus (Brachytoma) Grant, IV and Gale p. 583 |
| 1939 | Drillia (Brachytoma) Mukerjee p. 80 |
| 1961 | Drillia (Brachytoma) Dey |
| 1973 | Clavus (Brachytoma) Baldi p. 323 |
| 2002 | Brachytoma Sepkoski |
| 2007 | Brachytoma Hendy |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
G. Brachytoma Swainson 1840
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Clavus (Brachytoma) nigerrimus Sowerby 1834
†Drillia (Brachytoma) annandalei Vredenburg 1921
†Drillia (Brachytoma) buddhaica Vredenburg 1921
†Drillia (Brachytoma) convexa Vredenburg 1921
†Drillia (Brachytoma) gautama Vredenburg 1921
†Drillia (Brachytoma) pinfoldi Vredenburg 1921
†Drillia (Brachytoma) reticulata Vredenburg 1921
†Drillia (Brachytoma) sarasvati Vredenburg 1921
†Drillia (Brachytoma) tjemoroensis Martin 1903
†Drillia (Brachytoma) yabei Vredenburg 1921
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Kiessling 2004, Hendy et al. 2009 | |||||
Age range
Maximum range based only on fossils: base of the Bartonian to the top of the Late/Upper Pleistocene or 41.03000 to 0.01170 Ma
Minimum age of oldest fossil (stem group age): 37.71 Ma
Minimum age of oldest fossil (stem group age): 37.71 Ma
Collections (14 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Bartonian | Pakistan | B. sp. A (8676 183819) | |
| Chattian | Myanmar | Drillia pinfoldi (76589) | |
| Aquitanian | Myanmar | Drillia tjemoroensis, Drillia yabei, Drillia annandalei, Drillia buddhaica (76582 76596) Drillia tjemoroensis, Drillia yabei, Drillia annandalei, Drillia buddhaica, Drillia convexa (76593) Drillia tjemoroensis, Drillia yabei, Drillia sarasvati, Drillia annandalei, Drillia reticulata, Drillia buddhaica, Drillia gautama (76595) Drillia tjemoroensis, Drillia yabei, Drillia sarasvati, Drillia buddhaica (76584) | |
| Early/Lower Miocene | India | Drillia pinfoldi (72033) Drillia tjemoroensis (76573 76574) | |
| Tortonian | Denmark (Jutland) | B. obtusangula (34521) | |
| Piacenzian | Japan | B. sp. (97079) | |
| Late/Upper Pleistocene | India (Kerala) | B. crenularis (107971) |