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Sphenodiscus

Cephalopoda - Ammonitida - Sphenodiscidae

Taxonomy
Sphenodiscus was named by Meek (1871) [Sepkoski's age data: K Maes-l K Maes-u Sepkoski's reference number: 2,971].

It was reranked as Buchiceras (Sphenodiscus) by Craigen (1900).

It was assigned to Buchiceras by Craigen (1900); to Ammonoidea by Sepkoski (2002); and to Sphenodiscidae by Hyatt (1903), Zaborski (1985), Kennedy (1986), Kennedy and Cobban (1996), Kennedy et al. (1996), Kennedy et al. (1997) and Landman and Cobban (2003).

Synonymy list
YearName and author
1871Sphenodiscus Meek
1900Buchiceras (Sphenodiscus) Craigen
1903Sphenodiscus Hyatt p. 58
1985Sphenodiscus Zaborski p. 57
1986Sphenodiscus Kennedy p. 176
1996Sphenodiscus Kennedy and Cobban p. 801
1996Sphenodiscus Kennedy et al. p. 11
1997Sphenodiscus Kennedy et al. p. 4
2002Sphenodiscus Sepkoski
2003Sphenodiscus Landman and Cobban p. 15

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
RankNameAuthor
classCephalopodaCuvier 1797
subclassAmmonoidea()
orderAmmonitida
suborderAmmonitinaHyatt 1889
superfamilyAcanthoceratoidea(de Grossouvre 1894)
familySphenodiscidae
genusSphenodiscusMeek 1871

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. †Sphenodiscus Meek 1871
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†Sphenodiscus aberrans Böse 1928
†Sphenodiscus beecheri Hyatt 1903
†Sphenodiscus corroyi Sornay and Tessier 1949
†Sphenodiscus konincki Hyatt 1903
†Sphenodiscus lobatus Tuomey 1856
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Invalid names: Ammonites lenticularis Owen 1852 [replaced]
†Sphenodiscus pleurisepta Conrad 1857
†Sphenodiscus siva Forbes 1846
†Sphenodiscus stantoni Hyatt 1903
†Sphenodiscus ubaghsi de Groussouvre 1894
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Invalid names: Sphenodiscus rutoti de Grossouvre 1894 [synonym]
Diagnosis
No diagnoses are available
Measurements
partNmeanminimummaximummedians.d.
shell height1154.931.475.457.115.0
shell diameter1196.251.8140.0100.229.9
shell inflation111.010.0018.904.002.77

Composition: aragoniteo
Environment: marinec
Locomotion: fast-movingo
Life habit: nektonico
Diet: carnivoreo
Vision: well-developedc
Created: 2005-01-28 02:27:03
Modified: 2009-10-08 14:14:55
Source: o = order, c = class
References: Kiessling 2003, Kiessling 2004

Age range: base of the Maastrichtian to the top of the Early/Lower Maastrichtian or 72.10000 to 66.00000 Ma

Collections (212 total)


Time interval Ma Country or state Original ID and collection number
Late/Upper Campanian83.5 - 70.6Nigeria S. lobatus (69626)
Late/Upper Campanian83.5 - 70.6France S. sp. (165896) S. sp., S. ubaghsi (82889) S. ubaghsi (165895) S. ubaghsi, S. rutoti (165894)
Late/Upper Campanian83.5 - 70.6Angola S. sp. (88882)
Late/Upper Campanian83.5 - 70.6Mexico (Coahuila) S. sp. (79607 154244)
Late/Upper Campanian83.5 - 70.6France (Landes) S. sp. (213785 214030)
Late/Upper Campanian83.5 - 70.6Nigeria (Enugu) S. sp., S. lobatus (82733)
Maastrichtian72.1 - 66.0Mexico (Coahuila) S. lenticularis (51546) S. sp. (181867)
Maastrichtian72.1 - 66.0USA (Mississippi) S. lobatus (7606)
Maastrichtian72.1 - 66.0USA (Arkansas) S. sp. (4390)
Maastrichtian72.1 - 66.0Jordan S. lobatus (166341 166342 166343)
Maastrichtian72.1 - 66.0USA (Texas) S. lenticularis (4535 4553) S. pleurisepta (4528 4548 4556 4559 4563 4584 4588 4593 4601 4605 4608 4609 4611 4616 4621 4628 4629 4630 4631 4633 4636 7489) S. pleurisepta, S. intermedius (4582 4626) S. pleurisepta, S. lenticularis (4627) S. sp. (4525 4531 4537 4543 4546 4547 4575 4576 4578 4581 4586 4587 4594 4598 4603 4606 4607 4622 4623 4624 4625 4635 7480 7493) S. tirensis (7450 7519)
Maastrichtian72.1 - 66.0USA (Alabama) S. sp. (4257)
Maastrichtian72.1 - 66.0Brazil (Paraíba) S. brasiliensis (88073)
Maastrichtian - Late/Upper Maastrichtian72.1 - 66.0Brazil (Paraíba) S. sp., S. parahybensis (88070)
Early/Lower Maastrichtian70.6 - 66.0USA (Georgia) S. sp. (4267 4268 4269 4277 4278 4279 4280 4281)
Early/Lower Maastrichtian70.6 - 66.0USA (Mississippi) S. lenticularis (4105) S. pleurisepta (4099 4100) S. sp. (4101 4104 4109) S. sp., S. pleurisepta, S. lenticularis (4118)
Early/Lower Maastrichtian70.6 - 66.0Mexico (Nuevo Leon) S. intermedius (88244 88245) S. lenticularis (88241) S. lenticularis, S. intermedius, S. prepleurisepta (88242) S. prepleurisepta (88238)
Early/Lower Maastrichtian70.6 - 66.0USA (New Jersey) S. lobatus (83067)
Early/Lower Maastrichtian70.6 - 66.0Mexico (Coahuila de Zaragoza) S. lenticularis (88243)
Early/Lower Maastrichtian70.6 - 66.0USA (Alabama) S. sp. (4245 4247 4254 4256 4263 4264) S. sp., S. lobatus (4255)
Early/Lower Maastrichtian70.6 - 66.0Nigeria S. lobatus (69625)
Early/Lower Maastrichtian70.6 - 66.0USA (Maryland) S. lenticularis (125950)
Early/Lower Maastrichtian70.6 - 66.0USA (Wyoming) S. lenticularis (1575)
Early/Lower Maastrichtian70.6 - 66.0Egypt S. lobatus (224160 224161)
Late/Upper Maastrichtian70.6 - 66.0USA (Wyoming) S. pleurisepta (178307 178310 178311 178313 178314)
Late/Upper Maastrichtian70.6 - 66.0Belgium S. binkhorsti (82493)
Late/Upper Maastrichtian70.6 - 66.0USA (Alabama) S. pleurisepta (83238) S. sp. (4201 4205 4215 4230 4231 4235 4236 205803)
Late/Upper Maastrichtian70.6 - 66.0USA (South Carolina) S. lobatus (152080) S. sp. (4342 4344 4346 4351 4352 4361)
Late/Upper Maastrichtian70.6 - 66.0USA (South Dakota) S. pleurisepta (178315) S. sp., S. lenticularis, S. beecheri (88511)
Late/Upper Maastrichtian70.6 - 66.0USA (New Jersey) S. lobatus (4377 178550) S. sp. (4381)
Late/Upper Maastrichtian70.6 - 66.0USA (North Carolina) S. sp. (4363)
Late/Upper Maastrichtian70.6 - 66.0Mexico (Coahuila de Zaragoza) S. pleurisepta (88247) S. pleurisepta, S. aberrans (88246)
Late/Upper Maastrichtian70.6 - 66.0Netherlands S. binkhorsti (82496)
Late/Upper Maastrichtian70.6 - 66.0India Ammonites siva (41428)
Late/Upper Maastrichtian70.6 - 66.0Senegal S. corroyi (208782)
Late/Upper Maastrichtian70.6 - 66.0USA (Colorado) S. pleurisepta (178285 178286 178287 178288 178312)
Late/Upper Maastrichtian70.6 - 66.0USA (Missouri) S. lobatus, S. pleurisepta (205794)
Late/Upper Maastrichtian70.6 - 66.0USA (Texas) S. pleurisepta (4401 4421 4423 4506 4520 4632) S. pleurisepta, S. lenticularis, S. intermedius (4536) S. sp. (4399 4400 4410 4413 4418 4425 4435 4439 4458 4523 5554 5555 5556 5558 5560) S. sp., S. tirensis (4470) S. sp., S. tirensis, S. pleurisepta (4431) S. tirensis (4404 4407 4412 4428 4430 4476 4488 4495 4516) S. tirensis, S. pleurisepta (4398) S. tirensis, S. sp. (4499)
Late/Upper Maastrichtian70.6 - 66.0USA (Maryland) S. lobatus (82399 82400 82403) S. lobatus, S. pleurisepta (82408) S. sp. (4364 4365 4367 4368 4369 4370 4371 4372 4373 4375 4376) S. sp., S. lobatus (4366)
Late/Upper Maastrichtian70.6 - 66.0USA (Mississippi) S. lobatus (205793) S. pleurisepta (4123 4137 4160 4163 4165) S. pleurisepta, S. lenticularis (4164) S. sp. (4117 4136 4161 7604) S. sp., S. pleurisepta (4125) S. sp., S. pleurisepta, S. lenticularis, S. beecheri (4127)
Late/Upper Maastrichtian - Early/Lower Paleocene70.6 - 61.7USA (New Jersey) S. lobatus (26819)