PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Acirsa (wentletrap)

Gastropoda - Epitoniidae

Taxonomy

Acirsa was named by Mörch (1857) [Sepkoski's age data: K Apti R Sepkoski's reference number: 157]. It is extant.

It was assigned to Acirsinae by Sohl (1964), Sohl (1964) and Kase (1984); to Neotaenioglossa by Sepkoski (2002); and to Epitoniidae by Durham (1937), Harris and Palmer (1947), Palmer and Brann (1966), Todd (2001), Wienrich (2001) and Squires and Saul (2003).

Species

A. (Acirsa), A. (Acirsella), A. (Hemiacirsa), A. (Plesioacirsa), A. alpha, A. beta, A. culmosa, A. delta, A. epsilon, A. gravida, A. nexilia (syn. Mesostoma intermedium), A. obtusa, A. penepolaris

Species lacking formal opinion data

A. duvergieri, A. kelseyi, A. ofunatoensis, A. solumcostata

Synonyms

Tumidiacirsa was named by de Boury (1911) [Sepkoski's age data: T Eo].

It was synonymized subjectively with Acirsa by Beu (2011).

It was assigned to Neotaenioglossa by Sepkoski (2002).
Pseudoacirsa was named by de Boury (1909).

It was replaced with Tumidiacirsa by de Boury (1911).

Synonymy list

Year	Name and author
1857	Acirsa Mörch
1909	Pseudoacirsa de Boury
1911	Tumidiacirsa de Boury p. 221
1937	Acirsa Durham p. 510 figs. Plate 56, figure 4
1947	Acirsa Harris and Palmer p. 236
1964	Acirsa Sohl p. 313
1966	Acirsa Palmer and Brann p. 475
1984	Acirsa Kase p. 164
2001	Acirsa Todd
2001	Acirsa Wienrich p. 447
2002	Acirsa Sepkoski
2002	Tumidiacirsa Sepkoski
2003	Acirsa Squires and Saul p. 35

Is something missing? Join the Paleobiology Database and enter the data

Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Protostomia
—	Spiralia
superphylum	Lophotrochozoa

Rank	Name	Author
phylum	Mollusca
class	Gastropoda
subclass	Caenogastropoda	(Cox 1959)
superfamily	Epitonioidea	(Berry 1910)
family	Epitoniidae	Berry 1910
genus	Acirsa	Mörch 1857

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. Acirsa Mörch 1857 [wentletrap]

show all | hide all

Subg. Acirsa (Acirsa) Mörch 1857

hide

†Acirsa (Acirsa) vaquerosensis Durham 1937

Subg. †Acirsa (Acirsella) de Boury 1886

hide

†Acirsa (Acirsella) henryleai Price and Palmer 1928

†Acirsella effiae Willett 1939

Subg. †Acirsa (Hemiacirsa) de Boury 1890

hide

†Acirsa (Hemiacirsa) americana Wade 1926

†Acirsa (Hemiacirsa) gracilior Meyer 1886

†Acirsa (Hemiacirsa) whitneyi Palmer 1937

Subg. Acirsa (Plesioacirsa) de Boury 1909

hide

†Acirsa (Plesioacirsa) implexa Sohl 1964

†Acirsa (Plesioacirsa) microstriata Wade 1917

†Acirsa alpha Squires and Saul 2003

†Acirsa beta Squires and Saul 2003

†Acirsa culmosa Sohl 1964

†Acirsa delta Squires and Saul 2003

†Acirsa epsilon Squires and Saul 2003

†Acirsa gravida Sohl 1964

†Acirsa nexilia White 1889

hide

Invalid names: Mesostoma intermedium Whiteaves 1903 [synonym]

†Acirsa obtusa White 1889

†Acirsa penepolaris Wood 1872

Invalid names: Tumidiacirsa de Boury 1911 [synonym]

Diagnosis

Reference	Diagnosis
J. W. Durham 1937	Shell more or less heavy, small to medium size; axial ribs usually nearly obsolete; spiral ribs present; basal disk present; aperture entire although inner lin is often very thin; outer lip sharpened.
R. L. Squires and L. R. Saul 2003	Shell acuminate, whorls joined (with only a moderately impressed suture), and not umbilicate. Sculpture much reduced, may be spiral or axial or both; incised spiral grooves usually present. Basal keel absent. Basal disk indistinct but may be defined by a subperipheral ridge (Clench & Turner, 1950; DuShane, 1974, 1979; Kilburn, 1985; Bouchet & Waren, 1986; Dockery, 1993; Neville, 2001).