Platycopida

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

Belongs within: Ostracoda.
Contains: Cavellinidae, Cytherellidae, Kloedenellidae, Leperditellidae, Bassleratiidae.

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).

<==Platycopida [Platycopa, Platycopina]L05
|--Cytherelloidea [Cytherellacea]L05
| |--CavellinidaeA03b
| |--CytherellidaeA03b
| |--Gotlandella Adamczak 1966A03b [GotlandellidaeL05]
| | |--*G. martinssoni Adamczak 1966A03b
| | `--G. cornuta (Krause 1891)A03b
| `--Lichviniidae [Lichvininae, Lichwinidae, Lichwininae]L05
| |--Lichvinia Posner in Egorov 1950 [=Lichwinia (l. c.)]A03a
| | |--*L. lichvinensis Posner in Egorov 1950 [=L. lichwinensis (l. c.)]A03a
| | `--L. malevkensis Egorov 1950A03a
| `--GlyptolichvinellaL05
|--Kloedenelloidea [Kloedenellacea]L05
| |--KloedenellidaeA03b
| |--Sansabella Roundy 1926 (see below for synonymy)BB61
| | `--*S. amplectens Roundy 1926BB61
| |--Buregia Zaspelova in Polenova 1953BB61 [BuregiidaeM61]
| | |--*B. bispinosa Zaspelova in Polenova 1953BB61
| | `--B. krestovnikoviBB61
| |--MiltonellidaeBB61
| | |--Miltonella Sohn 1950BB61
| | | `--*M. shupei Sohn 1950BB61
| | |--Sanniolus Sohn 1954BB61
| | | `--*S. sigmoides Sohn 1954BB61
| | `--Savagellites Přibyl 1953 [=Savagella Geis 1932 non Foerste 1920]BB61
| | `--*S. lindahli (Ulrich 1891) [=Kirkbya lindahli, *Savagella lindahli]BB61
| |--Indivisiidae [Indivisiinae]M61
| | |--Indivisia Zaspelova 1954M61
| | | `--*I. indistincta Zaspelova 1954M61
| | |--Ilmenoindivisia Egorov 1954M61
| | | `--*I. wjadica Egorov 1954M61
| | `--Sulcoindivisa Egorov 1954 (n. d.)M61, BB61
| | `--*S. svinordensis Egorov 1954BB61
| `--Beyrichiopsidae [Knoxidae, Knoxinae, Mennerellidae]BB61
| |--Beyrichiella Jones & Kirkby 1886 (see below for synonymy)BB61
| | `--*B. cristata Jones & Kirkby 1886BB61
| |--Geffenina Coryell & Sohn 1938BB61
| | `--*G. marmerae Coryell & Sohn 1938BB61
| |--Knoxina Coryell & Rogatz 1932 (see below for synonymy)BB61
| | `--*K. lecta Coryell & Rogatz 1932BB61
| |--Mennerella Egorov 1950BB61
| | `--*M. tuberosa Egorov 1950BB61
| |--Gipsella Egorov 1950 (n. d.)M61, BB61
| | `--*G. polkovii Egorov 1950BB61
| |--Geffenites Coryell & Sohn 1938 (n. d.)M61, BB61
| | `--*G. jungae Coryell & Sohn 1938BB61
| |--Sargentina Coryell & Johnson 1939M61, BB61 [incl. Perimarginia Hou 1955BB61]
| | |--*S. allani Coryell & Johnson 1939A03a
| | `--S. postacutaFP12
| |--Beyrichiopsis Jones & Kirkby 1886 (see below for synonymy)BB61
| | |--*B. fimbriata Jones & Kirkby 1886BB61
| | `--B. fortisBB61
| `--Tambovia Samoilova 1951 [incl. Marginia Polenova 1952]BB61
| |--*T. prima Samoilova 1951BB61
| `--T. sculptaBB61
`--LeperditelloideaL05
|--LeperditellidaeL05
|--MonotiopleuridaeL05
| |--Karinutia Schallreuter 1978A03b
| |--Monotiopleura auriculata Guber & Jaanusson 1964WSB93
| `--Primitiella Ulrich 1894WSB93, BB61
| |--*P. constricta Ulrich 1894BB61
| |--P. brevisulcata Hessland 1949WSB93
| |--P. plattevillensisBB61
| `--P. unicornisBB61
`--BassleratiidaeL05

Beyrichiella Jones & Kirkby 1886 [incl. Kirkbyia Cossman 1899, Kirkbyina Ulrich & Bassler 1908, Synaphe Jones & Kirkby 1896 nec Huebner 1789 nec Thomson 1864]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

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.

[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.

[L05] Liebau, A. 2005. A revised classification of the higher taxa of the Ostracoda (Crustacea). Hydrobiologia 538: 115–137.

[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.

Leave a comment

Your email address will not be published. Required fields are marked *