Platycopina

Glyptopleura inopinata, from Benson et al. (1961). Left to right: posterior, left lateral, and dorsal views.

Belongs within: Metacopina.
Contains: Cavellinidae, Cytherellidae, Kloedenellidae.

The Platycopina are a group of ostracods that are first recorded from the Lower Silurian, named for the relatively flat sides of most members of the group. Members of the Platycopina are characterised by the lack of a duplicature and the present of a posteriorly situated brood pouch within the carapace, demarcated by a limen (Adamczak 2003a). They are represented in the modern fauna by the family Cytherellidae, and possibly by the unusual Punciidae. The Punciidae are known from dredgings in the South Pacific and have an elongate, delicate carapace with a long, straight hinge line and contact margins extended by a wide, septate fringe (Benson et al. 1961).

<==Platycopina [Kloedenelloidea, Platycopa, Platycopida]
    |--Cytherellacea A03b
    |    |--Cavellinidae A03b
    |    `--Cytherellidae A03b
    |--Punciidae [Punciacea] MD01
    |    |--Manawa Hornibrook 1949 BB61
    |    |    `--*M. tryphena Hornibrook 1949 BB61
    |    `--Puncia Hornibrook 1949 BB61
    |         `--*P. novozealandica Hornibrook 1949 BB61
    `--Kloedenellacea A03b
         |--Kloedenellidae A03b
         |--Sansabella Roundy 1926 (see below for synonymy) BB61
         |    `--*S. amplectens Roundy 1926 BB61
         |--Buregia Zaspelova in Polenova 1953 BB61 [Buregiidae M61]
         |    |--*B. bispinosa Zaspelova in Polenova 1953 BB61
         |    `--B. krestovnikovi BB61
         |--Miltonellidae BB61
         |    |--Miltonella Sohn 1950 BB61
         |    |    `--*M. shupei Sohn 1950 BB61
         |    |--Sanniolus Sohn 1954 BB61
         |    |    `--*S. sigmoides Sohn 1954 BB61
         |    `--Savagellites Přibyl 1953 [=Savagella Geis 1932 non Foerste 1920] BB61
         |         `--*S. lindahli (Ulrich 1891) [=Kirkbya lindahli, *Savagella lindahli] BB61
         |--Indivisiidae [Indivisiinae] M61
         |    |--Indivisia Zaspelova 1954 M61
         |    |    `--*I. indistincta Zaspelova 1954 M61
         |    |--Ilmenoindivisia Egorov 1954 M61
         |    |    `--*I. wjadica Egorov 1954 M61
         |    `--Sulcoindivisa Egorov 1954 (n. d.) M61, BB61
         |         `--*S. svinordensis Egorov 1954 BB61
         |--Glyptopleuridae BB61
         |    |--Glyptopleurina Coryell 1928 (see below for synonymy) BB61
         |    |    `--*G. montifera Coryell 1928 BB61
         |    |--Svantovites Pokorný 1950 BB61
         |    |    `--*S. primus Pokorný 1950 BB61
         |    `--Glyptopleura Girty 1910 (see below for synonymy) BB61
         |         |--*G. inopinata Girty 1910 BB61
         |         |--G. adunca BB61
         |         `--G. varicostata BB61
         |--Geisinidae [Perprimitiidae, Perprimitiinae] CB86
         |    |--Neonyhamnella suboblonga Wang 1983 WSB93
         |    |--Geisina Johnson 1936 (see below for synonymy) BB61
         |    |    `--*G. gregaria (Ulrich & Bassler 1906) [=Beyrichiella gregaria] BB61
         |    |--Hypotetragona Morey 1935 (see below for synonymy) BB61
         |    |    `--*H. impolita Morey 1935 BB61
         |    |--Knoxites Egorov 1950 BB61
         |    |    `--*K. menneri Egorov 1950 BB61
         |    |--Knoxiella Egorov 1950 CB86
         |    |    |--K. simplex Xie 1983 WSB93
         |    |    `--K. xinhuaensis Wang 1978 CB86
         |    |--Oliganisus Geis 1932 A03a [incl. Oliganiscus Neave 1940 BB61]
         |    |    |--*O. sulcatus Geis 1932 BB61
         |    |    `--O. punctatus BB61
         |    `--Jonesina Ulrich & Bassler 1908 (n. d.) M61, BB61
         |         |--*J. fastigiata (Jones & Kirkby 1867) [=Beyrichia fastigiata] BB61
         |         `--J. etheridgei Chapman 1920 F71
         `--Beyrichiopsidae [Knoxidae, Knoxinae, Mennerellidae] BB61
              |--Beyrichiella Jones & Kirkby 1886 (see below for synonymy) BB61
              |    `--*B. cristata Jones & Kirkby 1886 BB61
              |--Geffenina Coryell & Sohn 1938 BB61
              |    `--*G. marmerae Coryell & Sohn 1938 BB61
              |--Knoxina Coryell & Rogatz 1932 (see below for synonymy) BB61
              |    `--*K. lecta Coryell & Rogatz 1932 BB61
              |--Mennerella Egorov 1950 BB61
              |    `--*M. tuberosa Egorov 1950 BB61
              |--Gipsella Egorov 1950 (n. d.) M61, BB61
              |    `--*G. polkovii Egorov 1950 BB61
              |--Geffenites Coryell & Sohn 1938 (n. d.) M61, BB61
              |    `--*G. jungae Coryell & Sohn 1938 BB61
              |--Sargentina Coryell & Johnson 1939 M61, BB61 [incl. Perimarginia Hou 1955 BB61]
              |    |--*S. allani Coryell & Johnson 1939 A03a
              |    `--S. postacuta FP12
              |--Beyrichiopsis Jones & Kirkby 1886 (see below for synonymy) BB61
              |    |--*B. fimbriata Jones & Kirkby 1886 BB61
              |    `--B. fortis BB61
              `--Tambovia Samoilova 1951 [incl. Marginia Polenova 1952] BB61
                   |--*T. prima Samoilova 1951 BB61
                   `--T. sculpta BB61

Beyrichiella Jones & Kirkby 1886 [incl. Kirkbyia Cossman 1899, Kirkbyina Ulrich & Bassler 1908, Synaphe Jones & Kirkby 1896 non Huebner 1825] BB61

Beyrichiopsis Jones & Kirkby 1886 [incl. Deloia Croneis & Thurman 1939, Denisonella Croneis & Bristol 1942, Denisonia Croneis & Bristol 1939 non Krefft 1869, Leightonella Croneis & Gale 1939, Lokius Coryell & Johnson 1939] BB61

Geisina Johnson 1936 [incl. Hastifaba Cooper 1946, Neobeyrichiopsis Tasch 1953, Nuferella Bradfield 1935, Perijonesina Hou 1955, Perprimitia Croneis & Gale 1939, Prosopeionum Stover 1956] BB61

Glyptopleura Girty 1910 [incl. Ceratopleurina Coryell & Jonson 1939, Glyptopleurites Coryell & Johnson 1939, Mesoglypha Cooper 1941] BB61

Glyptopleurina Coryell 1928 [incl. Idiomorpha Croneis & Gale 1938 non Förster 1869, Idiomorphina Croneis & Gale 1939] BB61

Hypotetragona Morey 1935 [incl. Gillina Coryell & Johnson 1939, Janetina Coryell & Malkin 1936, Kloedenellina Coryell & Johnson 1939, Kuleschovkia Egorov 1950, Limnoprimitia Kummerow 1949, Plavskella Samoilova 1951] BB61

Knoxina Coryell & Rogatz 1932 [incl. Chesterella Croneis & Gutke 1939, Coryella Harris & Lalicker 1932, Mennerites Egorov 1950] BB61

Sansabella Roundy 1926 [incl. Carboprimitia Croneis & Funkhouser 1939, Lamarella Croneis & Funkhouser 1939, Lochriella Scott 1942, Persansabella Coryell & Sohn 1938, Reversabella Coryell & Johnson 1939; Sansabellidae] BB61

*Type species of generic name indicated

REFERENCES

[A03a] Adamczak, F. J. 2003a. The platycopine dynasty. 1. Family Kloedenellidae Ulrich & Bassler, 1908. Actual kloedenellaceans. Neues Jahrbuch für Geologie und Paläontologie—Abhandlungen 229 (3): 339–373.

[A03b] Adamczak, F. J. 2003b. The platycopine dynasty. 2. Family Cavellinidae Egorov, 1950. Authentic platycopines. Neues Jahrbuch für Geologie und Paläontologie—Abhandlungen 229 (3): 375–391.

[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.

[FP12] Farabegoli, E., & M. C. Perri. 2012. Millennial physical events and the end-Permian mass mortality in the western Palaeotethys: timing and primary causes. In: Talent, J. A. (ed.) Earth and Life: Global biodiversity, extinction intervals and biogeographic perturbations through time pp. 719–758. Springer.

[F71] Fletcher, H. O. 1971. Catalogue of type specimens of fossils in the Australian Museum, Sydney. Australian Museum Memoir 13: 1–167.

[MD01] Martin, J. W., & G. E. Davis. 2001. An updated classification of the Recent Crustacea. Natural History Museum Los Angeles County, Science Series 39: 1-124.

[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.

[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.

Last updated: 11 October 2020.