Belongs within: Punciocopida.
The Primitiopsidae are a group of ostracods known from the Ordovician to the mid-Devonian (Whatley et al. 1993).
Characters (from Benson et al. 1961): Unisulcate (sulcus or sulcal pit corresponding to S2) or nonsulcate; hingement may consist of median groove and corresponding ridge with lateral pits and prominences. Dimorphic, with more or less closed posterior velar chamber in heteromorphs but adventral structures may or may not be developed in tecnomorphs.
<==Primitiopsidae [Primitiopsididae]
| i. s.: Coryellina Bradfield 1935WSB93, ZL87
| |--*C. capax Bradfield 1935BB61
| `--C. indicata Sohn 1954WSB93
|--Polenovula Martinsson 1960 [Polenovulinae]BB61
| `--*P. crassa (Polenova 1955) [=Leperditellina crassa]BB61
|--Anisocyamus Martinsson 1960 [Anisocyaminae]BB61
| |--*A. elegans (Harris 1957) [=Primitiopsis elegans]BB61
| `--A. multiperforata (Harris 1957)WSB93
|--LeiocyaminaeBB61
| |--Leiocyamus Martinsson 1956BB61
| | `--*L. apicatus Martinsson 1956BB61
| `--Amygdalella Martinsson 1956 [=Amygalella (l. c.)]BB61
| `--*A. subclusa Martinsson 1956BB61
`--Primitiopsinae [Primitiopsiinae]BB61
|--Clavofabella Martinsson 1955BB61 [=Clavafabella (l. c.)M61]
| `--*C. incurvata Martinsson 1955BB61
|--Limbinaria Swartz 1956BB61
| `--*L. multipunctata Swartz 1956BB61
|--Primitiopsella Polenova 1960 [=Leperditellina Polenova 1955 non Neckaja 1955, Viazoviella Martinsson 1960]BB61
| `--*P. miranda (Polenova 1955) [=*Leperditellina miranda, *Viazoviella miranda]BB61
|--Sulcicuneus Kesling 1951 [Sulcicuneinae]BB61
| `--*S. porrectinatium Kesling 1951BB61
`--Primitiopsis Jones 1887BB61
|--*P. planifrons Jones 1887BB61
`--P. bassleriS61
*Type species of generic name indicated
References
[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.
[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.
[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.