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Lyropecten
Taxonomy
Lyropecten was named by Conrad (1862) [Sepkoski's age data: T Ol-l T Plio Sepkoski's reference number: 1112].
It was reranked as Pecten (Lyropecten) by Dall (1898), Arnold (1906), Grant and IV and Gale (1931); it was reranked as Chlamys (Lyropecten) by Gardner (1943) and Dockery (1982).
It was assigned to Pecten by Dall (1898), Arnold (1906), Grant and IV and Gale (1931); to Chlamys by Gardner (1943) and Dockery (1982); to Pectinidae by Addicott (1974), Moore (1984), Smith (1991) and Perrilliat (1994); and to Pterioida by Sepkoski (2002).
It was reranked as Pecten (Lyropecten) by Dall (1898), Arnold (1906), Grant and IV and Gale (1931); it was reranked as Chlamys (Lyropecten) by Gardner (1943) and Dockery (1982).
It was assigned to Pecten by Dall (1898), Arnold (1906), Grant and IV and Gale (1931); to Chlamys by Gardner (1943) and Dockery (1982); to Pectinidae by Addicott (1974), Moore (1984), Smith (1991) and Perrilliat (1994); and to Pterioida by Sepkoski (2002).
Species
Chlamys (Lyropecten) duncanensis, Chlamys (Lyropecten) ernestsmithi, Chlamys (Lyropecten) menthifontis, Chlamys (Lyropecten) planicosta, L. catalinae, L. cerrosensis (syn. Pecten (Lyropecten) ashleyi), L. condylomatus, L. crassicardo (syn. Pecten crassicardo biformatis, Swiftopecten adekunbiana, Pecten (Lyropecten) ricei, Pecten (Pallium) holwayi, Pecten crassicardo nomlandi, Pecten (Lyropecten) vickeryi), L. denaius, L. dumblei, L. gallegosi, L. laekeniensis, L. miguelensis, L. modulatus, L. pittieri, L. pretiosus (syn. Pecten (Lyropecten) miguelensis submiguelensis), L. septemplicatus, L. tamiamiensis, L. terminus, L. tiburonensis, L. vaughani
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1862 | Lyropecten Conrad p. 291 |
| 1898 | Pecten (Lyropecten) Dall p. 724 |
| 1906 | Pecten (Lyropecten) Arnold p. 49 |
| 1931 | Pecten (Lyropecten) Grant, IV and Gale p. 175 |
| 1943 | Chlamys (Lyropecten) Gardner p. 32 |
| 1974 | Lyropecten Addicott p. 180 |
| 1982 | Chlamys (Lyropecten) Dockery p. 44 |
| 1984 | Lyropecten Moore p. B49 |
| 1991 | Lyropecten Smith p. 43 |
| 1994 | Lyropecten Perrilliat |
| 2002 | Lyropecten Sepkoski |
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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. †Lyropecten Conrad 1862
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†Chlamys (Lyropecten) duncanensis Mansfield 1934
†Chlamys (Lyropecten) ernestsmithi Tucker 1931
†Chlamys (Lyropecten) menthifontis Glawe 1970
†Chlamys (Lyropecten) planicosta Gardner 1943
†Lyropecten catalinae Arnold 1906
†Lyropecten cerrosensis Gabb 1866
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Invalid names: Pecten (Lyropecten) ashleyi Arnold 1906 [synonym]
†Lyropecten condylomatus Dall 1898
†Lyropecten crassicardo Conrad 1856
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†Pecten (Lyropecten) crassicardo hamiltoni Arnold 1906
Invalid names: Pecten (Lyropecten) ricei Trask 1922 [synonym], Pecten (Lyropecten) vickeryi Trask 1922 [synonym], Pecten (Pallium) holwayi Clark 1915 [synonym], Pecten crassicardo biformatis Nomland 1917 [synonym], Pecten crassicardo nomlandi Hertlein 1931 [synonym], Swiftopecten adekunbiana Adegoke 1969 [synonym]
†Lyropecten denaius Woodring 1982
†Lyropecten dumblei Gardner 1945
†Lyropecten gallegosi Jordan and Hertlein 1926
†Lyropecten laekeniensis Vincent 1881
†Lyropecten miguelensis Arnold 1906
†Lyropecten modulatus Hertlein 1925
†Lyropecten pittieri Dall 1912
†Lyropecten pretiosus Hertlein 1925
†Lyropecten septemplicatus Nilsson 1827
†Lyropecten tamiamiensis Mansfield 1932
†Lyropecten terminus Arnold 1906
†Lyropecten tiburonensis Smith 1991
†Lyropecten vaughani Arnold 1906
†Pecten (Lyropecten) vaughani emigdioensis Wagner and Schilling 1923
Invalid names: Pecten (Lyropecten) miguelensis submiguelensis Loel and Corey 1932 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. T. Smith 1991 | Valves circular in outline, equally convex in profile; moderately flat to gibbous, some species tending to have rounded or angular ledges. Radiating ribs or- namented by radial costae in most taxa (but not the type species); interspaces with one or more radial riblets cross- ed by concentric lirae or growth lines. Auricles subequal, costate, and lirate, hinge line less than half shell length. Byssal notch moderately deep, ctenolium present in juveniles, preserved in some adults. Three pairs of hinge teeth in right valves, two pairs in left valves. Some species with regularly spaced ribs, others with prominent key ribs arranged in patterns characteristic of different phylo- genetic lineages within the genus. Some of the species with key ribs also have nodes.Similar to Nodipecten in valve outline and profile, hinge characters, ctenolium, and fine sculpture; unlike Nodi- pecten in having nearly equal auricles, a shallow byssal notch, and regularly spaced ribs rather than left valve ribs and right valve interspaces of alternating widths. Most species lack nodes, but in the group including L. crassicardo and L. magnificus, hollow nodes evolved over time from elongate thickenings along key ribs. Nodipecten nodes are commonly larger and bulbous. Lyropecten differs in growth form and proportions from "Macrochlamis," which is represented in California by taxa hav- ing large auricles, hinge lines greater than half the shell length, a shallow byssal notch, and no tendency to develop ledges, key ribs or nodes. Vertipecten has many characters that distinguish it from Lyropecten: a convex left valve and flat right valve, the number and character of imbricated ribs, shagreen microsculpture, deep byssal notch, and a smooth hinge area lacking crura. |
Measurements
No measurements are available
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| Source: g = genus, f = family, o = order | |||||
| References: Sanchez Roig 1926, Kiessling 2004 | |||||
Age range: base of the Late/Upper Campanian to the top of the Gelasian or 83.50000 to 1.80600 Ma
Collections (196 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Campanian | USA (Colorado) | L. sp. (162249) | |
| Early/Lower Oligocene | USA (Georgia) | Chlamys duncanensis (90567) | |
| Rupelian | USA (Mississippi) | Chlamys menthifontis (5867 5941 5943 5944 5949 5951) | |
| Rupelian | USA (California) | Pecten crassicardo (199729) | |
| Arikareean | USA (California) | L. miguelensis (59072) | |
| Late/Upper Oligocene | Panama | Nodipecten denaius (92984) | |
| Late/Upper Oligocene | Trinidad and Tobago | Pecten condylomaius (93368) | |
| Chattian | USA (Alabama) | Chlamys duncanensis (89610) | |
| Chattian | USA (California) | L. miguelensis (52417 52418) Pecten miguelensis (52382 52383 52384 52385 52386 52387 52388 52389 52390 52393 52394 52395 52397 52400 52401 52403 52408 52414) | |
| Chattian | Mexico (Baja California Sur) | Pecten crassicardo (43805) | |
| Chattian - Aquitanian | USA (Florida) | Chlamys burnetti (61051 61069 61074 61100 61124 61128) Chlamys marionensis, Chlamys burnetti (61072 61073) | |
| Aquitanian | USA (California) | Pecten crassicardo, Pecten miguelensis (52410) Pecten miguelensis (52409) | |
| Early/Lower Miocene | Mexico (Baja California Sur) | Pecten condylomatus (43803) Pecten crassicardo (43811 43812) Pecten crassicardo, Pecten pretiosus (43810 96567) Pecten pretiosus (96568) | |
| Early/Lower Miocene | Mexico (Tamaulipas) | Chlamys dumblei (43072 43073) Chlamys nicholsi, Chlamys dumblei (43074 43075) Chlamys nicholsi, L. dumblei (43071) | |
| Early/Lower Miocene | USA (California) | L. crassicardo (196138 196169) L. miguelensis (160212) Pecten miguelensis (71215 71216 71221 71222 71228 203414 208581) | |
| Early/Lower Miocene | Cuba | Pecten pittieri (75310 75316) | |
| Early/Lower Miocene - Middle Miocene | Mexico (Baja California Sur) | Pecten crassicardo (43809) | |
| Miocene | USA (California) | L. cerrosensis (195415) L. crassicardo (214400) L. estrellanus (195082) L. sp. (195120) L. terminus (194805 195039 195076 195416) Pecten cerrosensis (207027) Pecten crassicardo (208081 208107) Pecten crassicardo, Pecten vaughani (208087) Pecten miguelensis (208085 208086) | |
| Burdigalian | USA (Florida) | L. dumblei, Pecten condylomatus (42290 42328) Pecten condylomatus (41760 42250 42365 42678) | |
| Burdigalian | USA (California) | Pecten crassicardo (139850) | |
| Hemingfordian | USA (California) | Pecten crassicardo (84788) | |
| Barstovian | USA (California) | L. crassicardo (59074) Pecten crassicardo (91540) | |
| Barstovian - Hemphillian | Mexico (Baja California Sur) | L. miguelensis (18731) | |
| Langhian | Mexico (Baja California) | L. sp. (52183) | |
| Langhian | USA (California) | L. crassicardo (37526 37535) | |
| Middle Miocene | USA (California) | L. crassicardo (44968) Pecten crassicardo (94814 159672) | |
| Middle Miocene | Mexico (Veracruz) | L. dumblei (91580 91581 91583) | |
| Middle Miocene | Mexico (Baja California) | L. miguelensis (52181) | |
| Serravallian | USA (Florida) | Nodipecten condylomatus (111204) Pecten condylomatus (43032) Pecten nicholsi, Pecten condylomatus (94810) | |
| Serravallian - Tortonian | USA (California) | Pecten crassicardo (159599) | |
| Tortonian | USA (California) | Pecten crassicardo (59158) | |
| Late/Upper Miocene | USA (California) | L. crassicardo (44421 44423 44425 164674 214962 214963) Pecten crassicardo (94811 203546 216203) | |
| Late/Upper Miocene | Haiti | Chlamys pittieri (60106 60108 60109) | |
| Late/Upper Miocene - Early/Lower Pliocene | USA (California) | L. crassicardo (52203) | |
| Late/Upper Miocene - Pliocene | Aruba | L. pittieri (209170 209171) L. pittieri, L. tamiamiensis (209167) | |
| Late/Upper Miocene - Pliocene | Netherlands Antilles | L. pittieri (209175 209181 209183 209187) | |
| Hemphillian | USA (California) | Pecten crassicardo (19342) | |
| Messinian | USA (California) | L. cerrosensis (194870) L. sp. (194798 194868 194888 194894) L. terminus (194797 194801 194803 194866 194891 194895 195029 195032 195037) Pecten crassicardo (194799) | |
| Early/Lower Pliocene | USA (Florida) | L. jeffersonensis (35026) | |
| Early/Lower Pliocene | Mexico (Baja California Sur) | L. modulatus (44039) | |
| Early/Lower Pliocene | USA (California) | Pecten ashleyi (120822) Pecten cerrosensis (124511) Pecten estrellanus (96904) Pecten subnodosus (96539) Pecten terminus (206365 206370 220177 220180 220199) | |
| Pliocene | Mexico (Baja California Sur) | L. gallegosi, L. modulatus (93768) Pecten cerrosensis (43682 43684 57779) | |
| Pliocene | Mexico (Baja California) | Pecten cerrosensis (97124) Pecten cerrosensis, L. gallegosi, L. modulatus (97127) Pecten cerrosensis, Pecten ashleyi (208197) Pecten cerrosensis, Pecten gallegosi, L. modulatus (97125) Pecten modulatus (97128) | |
| Pliocene | Mexico (Sonora) | Pecten cerrosensis, Pecten cerrosensis (96564) | |
| Pliocene | USA (California) | L. cerrosensis (218944) Pecten ashleyi (204364) Pecten cerrosensis (204365 204366 208313) Pecten cerrosensis, Pecten ashleyi (120820 186032) Pecten terminus (216433 216865 216867 216870 216871 216872 216903) | |
| Zanclean - Gelasian | USA (California) | L. cerrosensis (214261 214262) | |
| Late/Upper Pliocene | Mexico (Baja California) | L. cerrosensis (52229) | |
| Piacenzian | USA (California) | L. cerrosensis (13451) | |
| Gelasian | USA (California) | L. cerrosensis (189554 189555 189559 189768 189769 207663) | |
| Early/Lower Pleistocene | USA (Florida) | Pecten pittieri (41199 41205) Pecten pittieri, Pecten tamiamiensis (41202) Pecten tamiamiensis (41209) | |
| Early/Lower Pleistocene | USA (North Carolina) | Chlamys ernestsmithi (59316 60899) | |
| Pleistocene | USA (North Carolina) | Chlamys ernestsmithi (59313) |