Anchistrocheles, from here.

Belongs within: Ostracoda.
Contains: Bairdia.

The Bairdiidae are a family of marine ostracods with a convex-backed carapace and wide duplicature. Though they have a long history, extending from the Lower Ordovician to the present, they mostly varied little in morphology throughout this time (Benson et al. 1961).

Characters (from Benson et al. 1961): Carapace convex-backed, mostly with asymmetrical, angulated, convex and concave, round and acuminate “bairdian” shape in lateral view; lateral outlines mostly symmetrically convex and terminally acuminate in dorsal view; left valve larger than right valve, both overreaching and overlapping it; with short, ridge-and-groove hingement and prominent duplicature and vestibule; muscle-scar pattern composed of several discrete spots.

<==Bairdiidae [Nesideidae]
    |    |--Pussella Danielopol 1976DH86
    |    |    |--P. botosaneanui Danielopol 1976DH86
    |    |    `--P. danielopoli Maddocks 1976DH86
    |    `--Anchistrocheles Brady & Norman 1889DH86
    |         |--*A. fumata Brady 1890BB61
    |         |--A. acerosaBB61
    |         |--A. barnharti Maddocks 1976DH86
    |         |--A. bensoni Maddocks 1969DH86
    |         |--A. bradyi (Scott 1905)DH86
    |         |--A. hartmanni Maddocks 1976DH86
    |         `--A. mcquadei Maddocks 1976DH86
         |--Bairdoppilata Coryell, Sample & Jennings 1935DH86
         |    |--*B. martyni Coryell, Sample & Jennings 1935BB61
         |    |--B. cratericola Maddocks 1969DH86
         |    `--B. glibertiS61
         |--Paranesidea Maddocks 1969DH86
         |    |--P. algicola Maddocks 1969DH86
         |    |--P. fracticorallicola Maddocks 1969DH86
         |    `--P. spongicola Maddocks 1969DH86
         |--Triebelina van den Bold 1964DH86 [incl. Glyptobairdia Stephenson 1946BB61]
         |    |--*T. indopacifica van den Bold 1946BB61
         |    |--T. bradyi (Triebel 1948)DH86
         |    |--T. coronataBB61
         |    |--T. gierloffi Hartmann 1959H59
         |    |--T. indopacifica van den Bold 1946H59
         |    |--T. raripila (Müller 1894)DH86
         |    |--T. schulziH59
         |    `--T. sertata (Triebel 1948)DH86
         `--Neonesidea Maddocks 1969DH86
              |--N. aregina Maddocks 1969DH86
              |--N. maddocksae Hartmann 1974DH86
              |--N. michaelseni Hartmann 1982DH86
              |--N. pateriformes Maddocks 1969DH86
              `--N. schulzi (Hartmann 1964)DH86
Bairdiidae incertae sedis:
  Rectobairdia Sohn 1960ZL87
    |--R. jinchengensis Shi 1987ZL87
    |--R. legumen (Jones & Kirkby 1886) [=Bairdia legumen; incl. B. angulatiformis Posner 1951]S82
    `--R. subsymmetrica Zhang in Zhang & Liang 1987ZL87
  Pustulobairdia Sohn 1960ZL87
    |--P. pruniseminata (Sohn 1954)ZL87
    `--P. subpruniseminata Zhang in Zhang & Liang 1987ZL87
  Lobobairdia Kollmaun 1963ZL87
    `--L. ventriconcava (Chen 1958) [=Bairdia ventriconcava]ZL87
  Abrobairdia Chen 1982CB86
    |--A. brevicostaCB86
    `--A. monocosta Chen & Bao 1986CB86
  Cryptobairdia Sohn 1960ZL87
    |--C. coryelli (Roth & Skinner 1931) (see below for synonymy)CB86
    |--C. submanifesta Zhang in Zhang & Liang 1987ZL87
    |--C. subseminalis Zhang in Zhang & Liang 1987ZL87
    `--C. xiaodonggouensis Shi 1987ZL87
  Bairdiacypris Bradfield 1935HM04 [incl. Actuaria Schneider 1956BB61]
    |--*B. deloi Bradfield 1935BB61
    |--B. glennensis (Harlton 1927)HM04
    |--B. haydenbranchensisBB61
    |--B. incurvata Kraft 1962WSB93
    |--B. longirobustaCB86
    |--B. reniformisCB86
    |--B. sinensisCB86
    |--B. ventralisCB86
    `--B. yui Shi 1960ZL87
  Orthobairdia Sohn 1960ZL87
    |--O. cestriensis (Ulrich 1891) [=Bairdia cestriensis]S82
    |--O. chasae (Kellett 1934) [=Bairdia chasae]ZL87
    |--O. florenaensis (Upson 1933) [=Bairdia florenaensis]ZL87
    |--O. insolens (Cooper 1941) [=Bairdia insolens]CB86
    |--O. ponderosa (Chen 1958) [=Bairdia ponderosa]CB86
    |--O. powersi (Kellett 1934) [=Bairdia powersi; incl. B. perincerta Cordell 1952]CB86
    |--O. texana (Harlton 1927)CB86
    `--O. xingyangensis Zhang in Zhang & Liang 1987ZL87
  Antibythocypris Jennings 1936BB61
    `--*A. gooberi Jennings 1936BB61
  Bairdianella Harlton 1929BB61
    |--*B. elegans Harlton 1929BB61
    `--B. subcylindricaCB86
  Bairdiolites Croneis & Gale 1939BB61
    `--*B. crescentis Croneis & Gale 1939BB61
  Ceratobairdia Sohn 1954BB61
    `--*C. dorsospinosa Sohn 1954BB61
  Fabalicypris Cooper 1946BB61
    |--*F. wileyensis Cooper 1946BB61
    |--F. altaCB86
    `--F. ellipticaCB86
  Newsomites Morris & Hill 1952BB61
    `--*N. pertumidus Morris & Hill 1952BB61
  Pseudocyproides Morris & Hill 1952BB61
    `--*P. alatus Morris & Hill 1952BB61
  Spinobairdia Morris & Hill 1952BB61
    `--*S. kellettae Morris & Hill 1952BB61
  Isobythocypris Apostolescu 1959LH61
    `--*I. unispinata Apostolescu 1959LH61
  Celechovites Pokorný 1950M61, BB61
    `--*C. cultratus Pokorný 1950BB61
  Famenella Polenova 1953 (n. d.)M61, BB61
    `--*F. inconditis Polenova 1953BB61
  Ellesmerina Glebovskaja & Zaspelova in Glebovskaja 1948M61, BB61 [=Mossolovella Egorov 1953BB61]
    `--*E. incognita Glebovskaja & Zaspelova in Glebovskaja 1948 [=*Mossolovella incognita]BB61
  Silenites Coryell & Booth 1933M61, BB61
    |--*S. silenus Coryell & Booth 1933BB61, ZL87, BB61
    |--S. fabalis (Cooper 1946)CB86
    |--S. lenticularis (Kellett 1934)CB86 [=Carbonia lenticularisBB61]
    |--S. marginiferus (Geis 1932) [=Bythocypris marginifera]CB86
    |--S. testatus (Chen 1958) [=Bythocypris testatus]ZL87
    `--S. unicostus Chen & Bao 1986CB86
  Steusloffina Teichert 1937M61, BB61
    |--*S. ulrichi Teichert 1937BB61
    `--S. papillosaBB61
  Artifactella Coryell & Booth 1933M61, BB61
    `--*A. tomahawki Coryell & Booth 1933BB61
  Elpinella Přibyl & Šnajdr 1950M61, BB61
    `--*E. radiata [=Leperditia radiata]BB61
  Hastacypris Croneis & Gutke 1939M61, BB61
    `--*H. bradyi Croneis & Gutke 1939BB61
  Shidelerites Morris & Hill 1951M61, BB61
    `--*S. typus Morris & Hill 1951BB61

Cryptobairdia coryelli (Roth & Skinner 1931) [=Bairdia coryelii; incl. B. ventricosa Roth & Skinner 1930 non Kirkby 1858]CB86

*Type species of generic name indicated


[BB61] Benson, R. H., J. M. Berdan, W. A. van den Bold, T. Hanai, I. Hessland, H. V. Howe, R. V. Kesling, S. A. Levinson, R. A. Reyment, R. C. Moore, H. W. Scott, R. H. Shaver, I. G. Sohn, L. E. Stover, F. M. Swain & P. C. Sylvester-Bradley. 1961. Systematic descriptions. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt Q. Arthropoda 3: Crustacea: Ostracoda pp. Q99–Q421. Geological Society of America and University of Kansas Press.

[CB86] Chen D.-Q. & Bao H. 1986. Lower Permian ostracodes from the Chihsia Formation of Jurong and Longtan, Jiangsu Province. Acta Micropalaeontologica Sinica 3 (2): 107–132.

[DH86] Danielopol, D. L., & G. Hartmann. 1986. Ostracoda. In: Botosaneanu, L. (ed.) Stygofauna Mundi: A Faunistic, Distributional, and Ecological Synthesis of the World Fauna inhabiting Subterranean Waters (including the Marine Interstitial) pp. 265–294. E. J. Brill/Dr W. Backhuys: Leiden.

[H59] Hartmann, G. 1959. Zur Kenntnis der lotischen Lebensbereiche der pazifischen Küste von El Salvador unter besonderer Berücksichtigung seiner Ostracodenfauna. Kieler Meeresforschungen 76 (2): 187–241.

[HM04] Hoare, R. D., & G. K. Merrill. 2004. A Pennsylvanian (Morrowan) ostracode fauna from Texas. Journal of Paleontology 78 (1): 185–204.

[LH61] Levinson, S. A., & H. V. Howe. 1961. Addendum. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt Q. Arthropoda 3: Crustacea: Ostracoda pp. Q421–Q422. Geological Society of America and University of Kansas Press.

[M61] Moore, R. C. 1961. Supplement—USSR treatise on Ostracoda. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt Q. Arthropoda 3: Crustacea: Ostracoda pp. Q422–Q429. Geological Society of America and University of Kansas Press.

[S61] Scott, H. W. 1961. Shell morphology of Ostracoda. In: Moore, R. C. (ed.) Treatise on Invertebrate Paleontology pt Q. Arthropoda 3: Crustacea: Ostracoda pp. Q21–Q37. Geological Society of America and University of Kansas Press.

[S82] Shi C.-G. 1982. Some early Carboniferous ostracodes from Nylam, Xizang (Tibet). Acta Palaeontologica Sinica 21 (3): 309–314.

[WSB93] Whatley, R. C., D. J. Siveter & I. D. Boomer. 1993. Arthropoda (Crustacea: Ostracoda). In: Benton, M. J. (ed.) The Fossil Record 2 pp. 343–356. Chapman & Hall: London.

[ZL87] Zhang X.-J. & Liang X.-Y. 1987. Ostracoda from the Taiyuan Formation of Xingyang and Gong Xian districts, Henan. Acta Micropalaeontologica Sinica 4 (3): 293–312.

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