PBDB Taxon

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

Osperleioceras

Taxonomy

Osperlioceras was named by Krimholz (1957).

It was corrected as Osperleioceras by Howarth (2013).

It was assigned to Harpoceratinae by Howarth (2013).

Species

O. (Osperleioceras), O. (Pseudopolyplectus) bicarinatum (syn. Leioceras cumulatum), O. (Pseudopolyplectus) loeve, O. (Pseudopolyplectus) subtile

Species lacking formal opinion data

O. alternans, O. schirardini, O. wunstorfi

Synonyms

Pseudopolyplectus was named as a genus. It is not extant.

It was reranked as Osperleioceras (Pseudopolyplectus) by Bécaud (2006); it was synonymized subjectively with Osperleioceras by Howarth (2013).

It was assigned to Ammonoidea by Sepkoski (2002); and to Osperleioceras by Bécaud (2006).

Synonymy list

Year	Name and author
1957	Osperlioceras Krimholz
2002	Pseudopolyplectus Sepkoski
2006	Osperleioceras (Pseudopolyplectus) Bécaud p. 69
2013	Osperleioceras Howarth p. 76

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

No classification data are available

†Osperlioceras seidlitzi Schirardin 1909

show all | hide all

†Osperlioceras holzapfeli Schirardin 1909

show all | hide all

Diagnosis

No diagnoses are available

Measurements

part	N	mean	minimum	maximum	median	s.d.
shell height	20	23.4	10.0	127.0	16.0	37.2
shell diameter	20	47.8	21.0	266.0	32.2	77.1
shell inflation	20	9.89	4.00	54.0	8.35	15.3

No ecological data are available

Age range: base of the Early/Lower Toarcian to the top of the Late/Upper Toarcian or 184.20000 to 174.70000 Ma

Collections (148 total)

Time interval	Ma	Country or state	Original ID and collection number
Early/Lower Toarcian	184.2 - 182.9	Spain (Granda)	Pseudopolyplectus bicarenatum (201096 201104)
Toarcian	184.2 - 174.7	France	Osperlioceras bicarinatum (210794 210795 210808 210818 210819 210833 210834 210835 210836)
Middle Toarcian	182.9 - 180.4	Spain (Granda)	Pseudopolyplectus bicarenatum (201108 201109 201112 201114 201115 201117 201118 201207 201212 201214 201225 201244 201252)
Middle Toarcian	182.9 - 180.4	Spain (Murcia)	Pseudopolyplectus bicarenatum (201428 201429 201437 201446 201453 201454 201456 201458 201463 201465)
Bifrons	182.9 - 174.7	France	O. bicarinatum (161639 161645 161646) O. holzapfeli (161657) O. schirardini (161658) O. spp. (161660 161661) Osperlioceras bicarinatum (170438)
Levesquei	182.9 - 174.7	France (Deux-Sevrès)	O. reynesi, O. authelini (140875)
Levesquei	182.9 - 174.7	France	O. wunstorfi (148812)
Levesquei	182.9 - 174.7	Spain	O. alternans (147112) O. authelini (147113) O. reynesi (147105 147107 147108) O. sourensis (147121 147122 147125) O. sp. (147091 147092 147095 147096 147102 147103 147104 147106 147110 147117) O. sp., O. alternans (147109)
Variabilis	182.9 - 174.7	France	Esericeras loeve (148811) O. holzapfeli, O. spp., O. bicarinatum (161665) O. spp. (161667) O. spp., O. bicarinatum (161662 161663)
Variabilis	182.9 - 174.7	France (Deux-Sevrès)	O. bicarinatum (147163 147164 147165) O. loeve (140898 147162)
Variabilis	182.9 - 174.7	Spain	O. bicarinatum (126516)
Late/Upper Toarcian	180.4 - 174.7	Spain	O. sp. (73289)
Late/Upper Toarcian	180.4 - 174.7	Spain (Murcia)	O. sp (201635 201636 201643 201647 201648) O. subbeticum (201649 201650 201654 201657) O. subbeticum, O. sp (201645 201651)
Late/Upper Toarcian	180.4 - 174.7	Spain (Granada)	O. sp (201291 201292 201293 201294 201295 201296 201297 201298 201316 201317 201318 201319 201320 201321 201322 201323 201324 201325 201326 201327 201328 201329 201330 201331 201332 201333 201335 201336 201337 201338 201339 201340 201341 201342 201343 201344 201345 201346 201347 201349 201351 201354 201355 201356 201357 201359 201360 201363 201366)
Late/Upper Toarcian	180.4 - 174.7	France	O. spp. (161672 161676) O. spp., O. bicarinatum (161668) O. spp., O. reynesi (161678) O. spp., O. reynesi, O. subcostulatum (161677) O. subcostulatum (161670)
Thouarsense	180.4 - 174.7	France (Deux-Sevrès)	O. bicarinatum (140870 147167) O. subtile (140871)
Thouarsense	180.4 - 174.7	France (Vendée)	O. authelini (147222) O. bicarinatum (147216) O. rivierense (147214) O. sp., O. rivierense, O. subcostulatum (147215)