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Helicaulax

Gastropoda - Aporrhaidae

Taxonomy
Helicaulax was named by Gabb (1868) [Sepkoski's age data: K Apti-u K Maes-u Sepkoski's reference number: 790].

It was reranked as Anchura (Helicaulax) by Saul and Popenoe (1993), Elder and Saul (1996).

It was assigned to Anchura by Saul and Popenoe (1993), Elder and Saul (1996); to Neotaenioglossa by Sepkoski (2002); and to Anchurinae by Kollmann (2009).

Synonymy list
YearName and author
1868Helicaulax Gabb
1993Anchura (Helicaulax) Saul and Popenoe p. 353
1996Anchura (Helicaulax) Elder and Saul p. 394
2002Helicaulax Sepkoski
2009Helicaulax Kollmann p. 55

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
classGastropoda
RankNameAuthor
subclassCaenogastropoda(Cox 1959)
—Sorbeoconcha(Ponder and Lindberg 1997)
—Hypsogastropoda(Ponder and Lindberg 1997)
superorderLatrogastropodaRiedel 2000
superfamilyStromboidea(Rafinesque 1815)
familyAporrhaidaeGray 1850
subfamilyAnchurinae
genusHelicaulaxGabb 1868

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. †Helicaulax Gabb 1868
show all | hide all
†Anchura (Helicaulax) popenoei Elder and Saul 1996
†Anchura (Helicaulax) tricosa Saul and Popenoe 1993
†Helicaulax bicarinata Gabb 1869
†Helicaulax bicarinata Deshayes in Leymerie 1842
†Helicaulax falcata Böhm 1891
†Helicaulax formosa Stephenson 1955
†Helicaulax latealata Riedel 1933
Diagnosis
ReferenceDiagnosis
L. R. Saul and W. P. Popenoe 1993Medium-sized, high-spired aporrhaids with whorls ornately sculptured by both axial and spiral elements and usually noded at the intersections; last whorl uniangulate; anterior rostrum elongate, narrow, straight; aperture subquadrate; posterior digitation reflexed, elongate, and adnate to spire at its base; outer lip extended, falcate, tapering posteriorly to a spike; inner lip thin to thick.
Measurements
No measurements are available
Composition: aragonitec
Locomotion: slow-movingf
Life habit: semi-infaunalf
Diet: detritivoref
Vision: limitedc
Created: 2009-05-20 05:55:58
Modified: 2009-10-09 22:54:17
Source: f = family, c = class
Reference: Kiessling 2004

Age range: base of the Cenomanian to the top of the Early/Lower Maastrichtian or 100.50000 to 66.00000 Ma

Collections (74 total)


Time interval Ma Country or state Original ID and collection number
Cenomanian100.5 - 93.9Germany H. sp. (66779)
Early/Lower Turonian93.9 - 89.8Canada (British Columbia) Anchura condoniana (210511)
Late/Upper Turonian93.9 - 89.8USA (Oregon) Anchura condoniana (86813)
Late/Upper Turonian93.9 - 89.8USA (California) Anchura condoniana (215288 215570 215620 238638) Anchura falciformis (220390 220930 220931) Anchura tricosa (220941 239925 239927 239928)
Middle Turonian93.9 - 89.8USA (California) Anchura condoniana (86782)
Turonian93.9 - 89.8USA (California) Anchura condoniana (44213 62347 80933 80935 80938 80939 80940 86784 86785 86788 219080 220298 220338 220340 220360 222077 222094 222097 222098 222100 222102 222103 222107 222108 238635) Anchura falciformis (220939 221082) Anchura tricosa (17404 223859 239859 239926)
Turonian93.9 - 89.8France H. ornatus (3728)
Coniacian89.8 - 85.7Cameroon H. latealata (177976 209692)
Coniacian89.8 - 85.7USA (California) Anchura popenoei (3887)
Coniacian - Santonian89.8 - 83.6Egypt H. themedensis (114825)
Late/Upper Santonian85.7 - 83.6Austria H. gibbosus (177758)
Santonian85.7 - 83.6France H. buchi (3731)
Late/Upper Campanian83.6 - 72.2Germany H. falcata (221859)
Early/Lower Maastrichtian72.2 - 66.0USA (Alabama) H. formosa (4248 4253 4259 4261 4264 4286) H. sp. (4274)
Early/Lower Maastrichtian72.2 - 66.0USA (Georgia) H. formosa (4305) H. sp. (4279)
Early/Lower Maastrichtian72.2 - 66.0Germany H. falcata (213668)
Late/Upper Maastrichtian72.2 - 66.0Poland H. pozaryskii (28082 28083)
Late/Upper Maastrichtian72.2 - 66.0USA (Tennessee) H. formosa (4121)
Late/Upper Maastrichtian72.2 - 66.0USA (South Carolina) H. formosa (4354 4355)
Late/Upper Maastrichtian72.2 - 66.0USA (Mississippi) H. formosa (4122 4127)
Late/Upper Maastrichtian72.2 - 66.0USA (Missouri) H. formosa (4385) H. sp. (4386)
Maastrichtian72.2 - 66.0Nigeria H. latealata (1361)