Cavellinidae

Carapace architecture of Sulcella (Postsulcella) testis (st = stragulum), from Adamczak (2003).


Belongs within: Platycopina.

The Cavellinidae are a group of ostracods known from the Middle Silurian to the lower Middle Triassic. They are ancestral to the later Cytherellidae, from which they differ in retaining a plesiomorphic random aggregate muscle scar pattern (Adamczak 2003).

Characters (from Adamczak 2003): Typically oval lateral carapace outline; right valve consistently larger, overreaching all around the smaller; contact of valves holosolenic; stragular process present; domiciliar dimorphism kloedenellid, i.e. in heteromorphs brood chamber always separated by an inner partition (limen); random aggregate muscle scar patterns.

<==Cavellinidae [Cavellininae]
    |--Reubenella avnimelechi Sohn 1968 A03
    |--Alatacavellina Wang 1983 A03
    |    `--*A. ovata Wang 1983 A03
    |--Chapmanites Krömmelbein 1954 A03
    |    `--*C. crassus Krömmelbein 1954 A03
    |--Facticavellina Wang & Cao 1997 A03
    |    `--*F. reliqua Wang & Cao 1997 A03
    |--Uchtovia Egorov 1950 A03
    |    `--*U. polenovae Egorov 1950 A03
    |--‘Uralina’ Rozhdestvenskaya 1962 non Schuchert & LeVene 1929 A03
    |    `--*U. uralica Rozhdestvenskaya 1962 A03
    |--Gotlandella Adamczak 1966 [Gotlandellidae] A03
    |    |--*G. martinssoni Adamczak 1966 A03
    |    `--G. cornuta (Krause 1891) A03
    |--Sansabelloides Harris & Lalicker 1932 [incl. Semilukiella Egorov 1950] A03
    |    |--S. texana (Warthin 1930) (see below for synonymy) A03
    |    `--*Semilukiella’ zaspelovae Egorov 1950 A03
    |--Birdsallella Coryell & Booth 1933 (see below for synonymy) A03
    |    |--*B. simplex Coryell & Booth 1933 A03
    |    |--*Cavellinella [Polenova & Zaspelova]’ batalinae A03
    |    |--*Cavellinella [Bradfield]’ casei Bradfield 1935 A03
    |    `--B. eifeliensis Adamczak 1968 A03
    |--Kloedenellitina Egorov 1950 [incl. Houhongfeiella Olempska 1999, Muhuaella Olempska 1999] A03
    |    |--*K. sygmaeformis (Batalina 1941) [=Beyrichia sygmaeformis] A03
    |    |--*Houhongfeiella’ microspinosa Olempska 1999 A03
    |    |--K. pseudosygmaeformis Egorov 1950 A03
    |    `--*Muhuaella’ spinosa Olempska 1999 A03
    |--Sulcella Coryell & Sample 1932 A03
    |    |--S. (Sulcella) A03
    |    |    |--*S. (S.) sulcata Coryell & Sample 1932 A03
    |    |    `--S. (S.) kloedenellides Adamczak 1968 A03
    |    `--S. (Postsulcella Adamczak 1968) A03
    |         |--S. (*P.) testis Adamczak 1968 A03
    |         `--S. (P.) postuma Becker 1965 A03
    `--Cavellina Coryell 1928 HM04 [incl. Alveus Hamilton 1942 A03, Alvenus (l. c.) A03]
         |  i. s.: *Alveus’ depressus Hamilton 1942 [=Alvenus (l. c.) depressus] A03
         |         C. glandella CB86
         |--C. (Cavellina) HM04
         |    |--*C. (C.) pulchella Coryell 1928 A03
         |    |--C. (C.) jolliffana (Bradfield 1935) [=Cytherella jolliffana] HM04
         |    |--C. (C.) rohrensis Becker 1965 A03
         |    `--C. (C.) symmetrica (Payne 1937) HM04
         `--C. (Invisiblia Polenova 1960) A03
              `--C. (*I.) indistincta Polenova 1955 A03

Birdsallella Coryell & Booth 1933 [incl. Cavellinella Bradfield 1935, Cavellinella Polenova & Zaspelova in Polenova 1953 non Bradfield 1935] A03

Sansabelloides texana (Warthin 1930) [=Jonesina texana; incl. Sulcella harrisi Bradfield 1935, *Sansabelloides harrisi] A03

*Type species of generic name indicated

REFERENCES

[A03] Adamczak, F. J. 2003. The platycopine dynasty. 2. Family Cavellinidae Egorov, 1950. Authentic platycopines. Neues Jahrbuch für Geologie und Paläontologie – Abhandlungen 229 (3): 375-391.

[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.

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

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