PBDB Taxon

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

Bairdiacypris

Ostracoda - Podocopida - Bairdiidae

Taxonomy

Bairdiacypris was named by Bradfield (1935).

It was assigned to Bairdiinae by Forel (2022); and to Bairdiidae by Hoare and Mapes (2000), Crasquin (2008), Sebe et al. (2013), Chitnarin (2017), Forel (2017), Forel (2017), Tanaka (2018), Chitnarin and Ketwetsuriya (2021), Kolar-Jurkovšek et al. (2024).

Species lacking formal opinion data

B. curvis, B. dubius, B. elongatissima, B. glabella, B. irregularis, B. mirautae, B. multidentata, B. postrectiformis, B. vaga, B. virga, B. zigulensis

Synonyms

Actuaria was named by Schneider (1956). Its type is Actuaria diffusa.

It was synonymized subjectively with Bairdiacypris by Kollmann (1963).

It was assigned to Bairdiidae by Schneider (1956).

Synonymy list

Year	Name and author
1935	Bairdiacypris Bradfield
1956	Actuaria Schneider p. 91
2000	Bairdiacypris Hoare and Mapes p. 13
2008	Bairdiacypris Crasquin p. 248
2013	Bairdiacypris Sebe et al. p. 516
2017	Bairdiacypris Chitnarin p. 670
2017	Bairdiacypris Forel
2018	Bairdiacypris Tanaka p. 15
2021	Bairdiacypris Chitnarin and Ketwetsuriya p. 5
2022	Bairdiacypris Forel p. 338
2024	Bairdiacypris Kolar-Jurkovšek et al. p. 185

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

Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Protostomia
—	Ecdysozoa	Aguinaldo et al. 1997
—	Panarthropoda
phylum	Arthropoda	Latreille 1829
—	Deuteropoda
—	Mandibulata
—	Pancrustacea	Zrzavý and Štys 1997

Rank	Name	Author
—	Hymenostraca	(Rolfe 1969)
superclass	Oligostraca	Zrzavý et al. 1997
class	Ostracoda
subclass	Podocopa	Sars 1865
order	Podocopida	Sars 1866
suborder	Bairdiocopina	Grundel 1967
superfamily	Bairdioidea	(Sars 1888)
family	Bairdiidae	Sars 1888
genus	Bairdiacypris	Bradfield 1935

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. †Bairdiacypris Bradfield 1935

show all | hide all

†Bairdiacypris aequisymmetrica Mette 2014

†Bairdiacypris anisica Kozur 1971

Invalid names: Bairdiacypris galbruni Crasquin-Soleau and Gradinaru 1996 [synonym]

†Bairdiacypris badgerai Ferdinando 2001

†Bairdiacypris bistiensis Crasquin-Soleau 1998

†Bairdiacypris caeca Shi 1987

†Bairdiacypris changxingensis Shi 1987

†Bairdiacypris combeae Forel 2011

†Bairdiacypris deloi Bradfield 1935

†Bairdiacypris fornicata Shi 1982

†Bairdiacypris guangpingensis Yi 1993

†Bairdiacypris haqanaensis Gerry and Honigstein 1987

†Bairdiacypris hayasakai Tanaka 2013

†Bairdiacypris ikeyanoriyukii Tanaka 2018

†Bairdiacypris kathleenae Gliwa 2020

†Bairdiacypris longirobusta Chen 1958

†Bairdiacypris mirabilis Guan 1985

†Bairdiacypris mirautaae Crasquin-Soleau and Gradinaru 1996

†Bairdiacypris opulenta Zanina 1971

†Bairdiacypris ottomanensis Crasquin-Soleau et al. 2004

†Bairdiacypris postretiformis Lethiers 1989

†Bairdiacypris praewangi Kozur 1985

†Bairdiacypris reniformis Chen 1958

†Bairdiacypris sartriensis Donze 1966

†Bairdiacypris sinensis Chen 1958

†Bairdiacypris sorgunensis Forel 2018

†Bairdiacypris suprapermiana Kozur 1985

†Bairdiacypris triassica Kozur 1971

†Bairdiacypris ventralis Chen 1958

†Bairdiacypris wangi Kozur 1985

†Bairdiacypris wangi Olempska 1999

†Bairdiacypris zaliensis Mette 2010

Invalid names: Actuaria Schneider 1956 [synonym]

Diagnosis

No diagnoses are available

Measurements

part	N	mean	minimum	maximum	median	s.d.
carapace height	39	0.454	0.280	0.770	0.450	0.124
shell height	11	0.397	0.260	0.510	0.400	0.084
valve height	26	0.411	0.270	0.870	0.378	0.158

Composition:

low Mg calcitec

Environment:

hypersaline, marine, brackish, freshwaterc

Locomotion:

actively mobilec

Life habit:

epifaunalo

Diet:

detritivoreo

Diet 2:

grazero

Vision:

limitedc

Created:

2010-02-05 02:00:00

Modified:

2010-02-23 23:16:56

Source: o = order, c = class

References: Jell and Adrain 2002, Kiessling 2004

Age range: base of the Late/Upper Frasnian to the top of the Thouarsense or 375.20000 to 174.70000 Ma

Collections (473 total)

Time interval	Ma	Country or state	Original ID and collection number
Frasnian	382.31 - 372.15	Afghanistan (Ghazni)	B. sp. (75031)
Late/Upper Frasnian	375.2 - 372.15	Poland (Kostomloty)	B. sobiekurowiensis, B. sp. A., B. martinae, B. irregularis (162220) B. sobiekurowiensis, B. sp., B. vaga, B. sp. A., B. anteroangulosa, B. sp. C, B. sp. B, B. irregularis (162212) B. sp. C, B. sp. A., B. irregularis (162211) B. vaga (162214)
Late/Upper Frasnian	375.2 - 372.15	Poland	B. martinae (35388) B. martinae, B. sobiekurowensis, B. irregularis, B. quarziana (35387) B. martinae, B. sobiekurowiensis (35386) B. martinae, B. sobiekurowiensis, B. virga (35393) B. martinae, B. virga (35389) B. sobiekurowiensis, B. virga, B. quarziana (35390 35391) B. sp. (35399) B. sp. nov. A, B. quarziana (35392) B. virga (35394 35396) B. virga, B. quarziana (35397 35398 35400) B. virga, B. quarziana, B. zigulensis (35401)
Early/Lower Famennian	372.15 - 368.5	Poland	B. quarziana (35403 35408 35411) B. quarziana, B. zigulensis (35402 35405) B. sobiekurowiensis (35409)
Early/Lower Famennian	372.15 - 368.5	USA (Nevada)	B. martinae, B. quarziana, B. anteroangulosa (158171)
Tournaisian	358.86 - 346.7	China (Guizhou)	B. wangi (58462)
Morrowan	323.4 - 318.6	USA (Texas)	B. sp. A, B. sp. B (236937)
Kashirian	313.8 - 311.46	Ukraine	B. sp. (216041)
Asselian	298.9 - 293.52	Greece	B. ventralis (112051)
Asselian	298.9 - 293.52	Thailand	B. sp. F (137892)
Asselian	298.9 - 293.52	Austria	B. sp. (108503 108504)
Asselian - Sakmarian	298.9 - 290.1	Thailand	B. sp. E (137895) B. sp. G (137898)
Sakmarian	293.52 - 290.1	China (Fujian)	B. longirobusta (95696)
Sakmarian	293.52 - 290.1	Australia (Western Australia)	B. badgerai (108215 108217 108296) B. sp. A (108208 108211 108230 108231 108235 108236 108237 108238 108241 108244 108245 108246 108283 108285 108291 108297 108298 108299 108300 108301 108302 108303) B. sp. A, B. badgerai (108209 108242 108289)
Sakmarian	293.52 - 290.1	Japan	B. ikeyanoriyukii (197662)
Artinskian	290.1 - 283.3	China (Fujian)	B. curvis (95698 95702) B. deloi, B. sinensis (95701)
Kungurian	283.3 - 274.4	Thailand	B. sp. B (223974) B. sp. H (137910)
Kungurian	283.3 - 274.4	China (Fujian)	B. curvis, B. longirobusta, B. deloi, B. guangpingensis, B. sinensis, B. reniformis, B. praewangi (95707) B. fornicata (95704 95708) B. longirobusta (95703) B. longirobusta, B. deloi, B. guangpingensis, B. fornicata, B. reniformis, B. praewangi (95706) B. longirobusta, B. fornicata, B. sinensis (95705) B. longirobusta, B. reniformis (95709)
Kungurian	283.3 - 274.4	Guatemala	Actuaria suksuensis (155577) B. deloi (155568) B. elongatissima (155575) B. sp. (155574) B. sp. 1, B. sp. (155573) B. sp. C, B. sp. 1, B. deloi (155572) B. sp., B. elongatissima (155576)
Kungurian	283.3 - 274.4	China (Jiangsu)	B. longirobusta (142172 142175 142179 142181 142182 142186) B. longirobusta, B. ventralis (142188) B. reniformis (142183) B. sinensis (142187) B. ventralis (142167 142180 142190 142191) B. ventralis, B. sinensis (142178)
Kungurian - Roadian	283.3 - 266.9	Thailand	B. sp. (164537)
Roadian	274.4 - 266.9	Thailand	B. deloi (137901) B. sp. 1, B. sp. 2 (223889) B. sp. 1, B. sp. 2, B. sp. H (223887) B. sp. A, B. sp. D (223962) B. sp. C (223970)
Roadian	274.4 - 266.9	Russian Federation	Actuaria deplanata, Actuaria diffusa (197598) Actuaria diffusa (132366)
Wordian	266.9 - 264.28	Thailand	B. longirobusta (87204 223976) B. postrectiformis (87199)
Capitanian	264.28 - 259.51	Azerbaijan	B. sp. 1, B. memorabilis (110674) B. sp. 1, B. sp. 2 (110675)
Capitanian	264.28 - 259.51	Thailand	B. sp. B (223983)
Capitanian	264.28 - 259.51	Japan	B. deloi (109844) B. hayasakai (142029)
Capitanian	264.28 - 259.51	China (Sichuan)	B. sp.1, B. sp.2 (189439) B. sp.1, B. sp.2, B. sp.3 (189442) B. sp.1, B. sp.3 (189441) B. sp.2 (189446) B. sp.2, B. sp.3, B. sp.5 (189461) B. sp.4 (189443) B. sp.4, B. sp.5 (189444) B. sp.5 (189445 189466)
Capitanian	264.28 - 259.51	Russian Federation	B. changxingensis (124390) B. sp. A, B. sp. (124400)
Wuchiapingian	259.51 - 254.14	Iran	B. sp. (155128 155129 155130 155131 155133)
Wuchiapingian	259.51 - 254.14	Hungary	B. praewangi (146205) B. suprapermiana (146175) B. wangi (146217 146246)
Wuchiapingian	259.51 - 254.14	China (Sichuan)	B. longirobusta (148477) B. sp. (148498) B. sp., B. reniformis (148476) B. sp.6 (189472 189474) B. sp.6, B. sp.7 (189473) B. sp.6, B. sp.7, B. sp.8, B. sp.10, B. sp.11, B. sp.12 (189489) B. sp.6, B. sp.8 (189481) B. sp.7, B. sp.8 (189479 189480 189482 189487) B. sp.7, B. sp.8, B. sp.10, B. sp.11, B. sp.12 (189488) B. sp.7, B. sp.8, B. sp.9, B. sp.10, B. sp.11, B. sp.12 (189484) B. sp.8, B. sp.10, B. sp.11, B. sp.12 (189486) B. sp.8, B. sp.11 (189485)
Wuchiapingian	259.51 - 254.14	Lithuania	B. jonesiana (45952 46158 46159 46170 46198 46202 46203 46406 46411 46414 46427)
Wuchiapingian	259.51 - 254.14	Russian Federation (Kaliningrad)	B. jonesiana (46204)
Wuchiapingian	259.51 - 254.14	Greece	B. bistiensis (112058) B. deloi, B. bistiensis (112052) B. sp. 1, B. bistiensis (112057)
Wuchiapingian - Changhsingian	259.51 - 251.902	Israel	B. haqanaensis, B. ventralis (95762 109723)
Changhsingian	254.14 - 251.902	China (Guangxi)	B. mirautaae (97109)
Changhsingian	254.14 - 251.902	Iran	B. ottomanensis (220252 220255) B. ottomanensis, B. zaliensis (220258) B. sp. (155140 155141) B. sp. 1, B. ottomanensis (220248) B. sp. 1, B. sp. 2, B. sp. 3, B. ottomanensis (220249) B. sp. 2, B. ottomanensis (220256 220257) B. sp. 2, B. sp. 3, B. ottomanensis (220251) B. sp. 2, B. sp. 4, B. ottomanensis (220253) B. sp. 2, B. sp. 4, B. ottomanensis, B. kathleenae (220254) B. sp. 3 (168929) B. sp. A (168930) Praezabythocypris ottomanensis (168914 168915 168916 168917 168921 168931)
Changhsingian	254.14 - 251.902	Hungary	B. caeca (140067) B. fornicata (140058 140059)
Changhsingian	254.14 - 251.902	Israel	B. haqanaensis (108988 108993) B. haqananensis (108990)
Changhsingian	254.14 - 251.902	China (Guizhou)	B. sp. 7 (132515 132516 132520 132522) B. sp. 7, B. sp. 8, B. sp. 9 (132517) B. sp. 8, B. sp. 9 (132519) B. sp. 9 (132518)
Changhsingian	254.14 - 251.902	China (Sichuan)	B. fornicata (148507) B. fornicata, B. ventralis (148481) B. sp. (148489 148500 148503 148513) B. sp., B. sinensis (148483) B. ventralis (148493 148504 148512)
Changhsingian	254.14 - 251.902	China (Hubei)	B. glabella (149226)
Changhsingian	254.14 - 251.902	Italy	Bairdia sp. 3 (84133) B. caeca (84151) B. longirobusta (87191) B. longirobusta, B. wangi (84134) B. sp. 1 (84130)
Changhsingian	254.14 - 251.902	Slovenia	B. sp. (234857 234859 234864 234869 234874 234875)
Changhsingian	254.14 - 251.902	Serbia	B. caeca (112049)
Changhsingian	254.14 - 251.902	China (Zhejiang)	B. anisica (97928 97929) B. anisica, B. fornicata (97912) B. caeca (97889 97898 97916 97926 117585 117586 117654) B. caeca, B. fornicata (97918 97920 117592 117664) B. caeca, B. fornicata, B. sinensis (117577) B. caeca, B. sinensis (117588) B. fornicata (97896 97904 97910 97921 97925 117580 117584 117618 117631 117634 117645 117648) B. fornicata, B. sinensis (117656 117665) B. longirobusta (117587 117599 117615 117626 117639 117644 117647 117671) B. longirobusta, B. caeca (117600 117643 117655 117660) B. longirobusta, B. caeca, B. changxingensis, B. fornicata, B. sinensis (117598 117642 117668) B. longirobusta, B. caeca, B. fornicata (117670 117673) B. longirobusta, B. caeca, B. fornicata, B. sinensis (117667) B. longirobusta, B. caeca, B. sinensis (117575) B. longirobusta, B. changxingensis (117616) B. longirobusta, B. changxingensis, B. fornicata (117619 117624) B. longirobusta, B. changxingensis, B. fornicata, B. sinensis (117590) B. longirobusta, B. changxingensis, B. sinensis (117661) B. longirobusta, B. fornicata (117579 117620 117622 117633 117638) B. sinensis (117576 117581 117595 117617) B. sp. C, B. longirobusta, B. caeca, B. changxingensis, B. fornicata, B. sinensis (117597 117601) B. sp., B. fornicata (117636) B. sp., B. longirobusta (117621) B. sp., B. longirobusta, B. caeca, B. changxingensis, B. fornicata, B. sinensis (117669) B. sp., B. longirobusta, B. changxingensis, B. fornicata (117625) B. sp., B. longirobusta, B. changxingensis, B. fornicata, B. sinensis (117596)
Changhsingian	254.14 - 251.902	China (Fujian)	B. caeca (121292) B. changxingensis (121205 121289) B. changxingensis, B. fornicata (121288) B. fornicata (121229) B. longirobusta (121293) B. longirobusta, B. caeca (121230) B. longirobusta, B. caeca, B. changxingensis (121228) B. longirobusta, B. changxingensis, B. fornicata (121291)
Changhsingian	254.14 - 251.902	China (Xizang)	B. changxingensis (106661) B. dubius (106655) B. sp. 1 (106651)
Griesbachian	251.902 - 250.5	Türkiye	B. sp. 1 (169090) B. sp. 1, B. sp. 2, Praezabythocypris ottomanensis (169074) B. sp. 1, Praezabythocypris ottomanensis (169081 169094) B. sp. 2, B. sp. 1, Praezabythocypris ottomanensis (169073) B. sp. 3 (169084 169092) B. sp. 4 (169058) Praezabythocypris ottomanensis (169060 169067 169068 169072 169075 169086)
Griesbachian	251.902 - 250.5	China (Guangxi)	B. sp. B, B. sp. (106639)
Griesbachian	251.902 - 250.5	Hungary	B. fornicata (140070)
Griesbachian	251.902 - 250.5	Slovenia	B. sp. (234865)
Griesbachian	251.902 - 250.5	Saudi Arabia	B. sp. 1 (87279)
Griesbachian	251.902 - 250.5	China (Guizhou)	B. ottomanensis (132535) B. sp. 2, B. sp. 6 (132527) B. sp. 4 (132533) B. sp. 4, B. ottomanensis (132532) B. sp. 4, B. sp. 1 (132538) B. sp. 5 (132537) B. sp. 5, B. sp. 3 (132539)
Griesbachian	251.902 - 250.5	China (Zhejiang)	B. anisica (97930 97931 97932) B. sp. 1, B. anisica (116316)
Griesbachian	251.902 - 250.5	Iran	B. longirobusta, B. ottomanensis (220270) B. ottomanensis (220260 220263 220264 220266 220267 220268 220269 220271) B. sp. (155151) B. sp. 1, B. sp. 2, B. sp. 3, B. longirobusta, B. ottomanensis, B. kathleenae (220261) B. sp. 2, B. sp. 3, B. longirobusta, B. ottomanensis, B. kathleenae (220259) B. sp. 2, B. sp. 3, B. sp. 4, B. longirobusta, B. ottomanensis, B. kathleenae (220262) B. sp. 3, B. ottomanensis, B. kathleenae (220265) B. sp. 3, B. sp. A, Praezabythocypris ottomanensis (168932) Praezabythocypris ottomanensis (168938 168939 168941 168942 168943 168945 168946 168947 168948 168949 168950 168951)
Induan	251.902 - 249.9	China (Sichuan)	B. ottomanensis (47904) B. sp.1, B. sp.2, B. ottomanensis (45895)
Induan	251.902 - 249.9	Türkiye	B. n.sp.1, B. ottomanensis (48057) B. ottomanensis (48018 48019 48053 48098 48102 48103 48104) B. sp.2 (48101) B. sp.X, B. sp.2, B. ottomanensis (48052)
Dienerian	250.5 - 249.9	Pakistan	B. sp. (117950)
Spathian	248.1 - 246.7	China (Xizang)	B. anisica, B. combeae (112027) B. combeae (112032 112033)
Spathian	248.1 - 246.7	China (Guangxi)	B. galbruni (106637 106645 106646) B. sp. A, B. galbruni (106636)
Spathian	248.1 - 246.7	Romania	B. galbruni (106552) B. sp. 3, B. anisica (154985)
Aegean	246.7 - 244.99	China (Xizang)	B. anisica, B. combeae (112036) B. combeae (112035)
Aegean	246.7 - 244.99	Romania	B. anisica (154989 154993 154994) B. anisica, B. triassica (154999) B. mirautaae (154986) B. mirautaae, B. anisica (154997 155001 155003) B. sp. 2, B. anisica (154998) B. sp. 3, B. anisica (154996)
Anisian	246.7 - 241.464	Romania	B. galbruni (48608 48637)
Anisian	246.7 - 241.464	Türkiye	B. sp. (98005)
Bithynian	244.99 - 244.24	Romania	B. sp. 2, B. anisica (155008) B. sp. 2, B. mirautaae (155005) B. sp. 2, B. sp. 1, B. sp. 4, B. anisica (155004) B. sp. 2, B. sp. 4, B. anisica (155007) B. spp., B. anisica, B. triassica, B. mirabilis (197722)
Bithynian	244.99 - 244.24	China (Xizang)	B. combeae (112039)
Pelsonian	244.24 - 243.33	China (Xizang)	B. anisica (112040)
Ladinian	241.464 - 237.0	Iran	B. sp. (97874)
Julian	237.0 - 233.6	Türkiye	B. sp. (197739) B. spp., B. ottomanensis, B. triassica, B. aequisymmetrica (197740)
Carnian	237.0 - 227.3	Israel	B. sp. (41683)
Sevatian	211.18 - 205.7	Canada (Yukon)	B. sorgunensis (225003) B. sp. 1, B. triassica (225009) B. sp. 2, B. triassica, B. sorgunensis (225001) B. sp. 3 (225011 225012) B. triassica (225000)
Rhaetian	205.7 - 201.4	Austria	B. multidentata (132267)
Angulata	201.4 - 199.5	Germany	B. form B, B. form G (139807)
Planorbis	201.4 - 199.5	United Kingdom (East Yorkshire)	B. sartriensis (159120)
Planorbis	201.4 - 199.5	Germany	B. form B (139803 139804)
Raricostatum	199.5 - 192.9	Germany	B. form A, B. form B, B. form C, B. form D, B. form G (139814) B. form A, B. form C (139816) B. form A, B. form C, B. form G (139811) B. form B, B. form C, B. form G (139812 139815) B. form C, B. form D (139817) B. form C, B. form D, B. form G (139813)
Semicostatum	199.5 - 192.9	Germany	B. form A, B. form C (139809) B. form C (139808)
Davoei	192.9 - 184.2	Germany	B. form C (139822)
Early/Lower Pliensbachian	192.9 - 184.2	Germany	B. form B (139820) B. form D (139819) B. form D, B. form G (139818)
Ibex	192.9 - 184.2	Portugal	B. rectangularis (33459)
Jamesoni	192.9 - 184.2	Türkiye	B. sp. 1 (158460 158461 158462) B. sp. 1, B. sp. 2 (158464)
Spinatum	192.9 - 184.2	Portugal	B. triangularis (33470)
Falciferum	184.2 - 182.9	Portugal	B. rectangularis, B. triangularis (33477) B. sp. (33476)
Falciferum	184.2 - 182.9	Spain	B. dorisae (119588 119590)
Falciferum	184.2 - 182.9	United Kingdom (Somerset)	B. spp. (33340 33341 33342 33343 33344)
Falciferum	184.2 - 182.9	Austria	B. form B, B. form D, B. form E, B. form F, B. sartriensis (139826) B. form B, B. form E, B. form F, B. sartriensis (139825)
Tenuicostatum	184.2 - 182.9	Austria	B. form A, B. form B (139824) B. form A, B. form B, B. form G (139823)
Tenuicostatum	184.2 - 182.9	Portugal	B. rectangularis, B. triangularis, B. sp. (33475) B. triangularis (33474)
Tenuicostatum	184.2 - 182.9	Spain	B. tumida (119573)
Toarcian	184.2 - 174.7	United Kingdom (Wales)	B. triangularis (33497)
Bifrons	182.9 - 174.7	Portugal	B. rectangularis (33479) B. rectangularis, B. triangularis (33478 33481 33482)
Bifrons	182.9 - 174.7	United Kingdom (Somerset)	B. spp. (33346 33347)
Bifrons	182.9 - 174.7	Austria	B. form B, B. form E, B. form F, B. sartriensis (139827 139828)
Bifrons	182.9 - 174.7	Spain	B. dorisae (119593)
Levesquei	182.9 - 174.7	Austria	B. form A, B. form B, B. form D, B. form E, B. form F, B. form G, B. sartriensis (139829) B. form A, B. form E, B. form F, B. form G, B. sartriensis (139830)
Levesquei	182.9 - 174.7	Portugal	B. rectangularis (33485) B. subrectangularis (33487)
Variabilis	182.9 - 174.7	Portugal	B. triangularis (33483)
Thouarsense	180.4 - 174.7	United Kingdom (Somerset)	B. spp. (33350)