Paraparchitidae

Left and right valves of Shivaella nicklesi, from Hoare & Merrill (2004).


Belongs within: Ostracoda.

The Paraparchitidae are a group of mostly robust ostracods known from the Lower Devonian to the Middle Permian (Benson et al. 1961).

Characters (from Benson et al. 1961): Nonsulcate, nonlobate, nonvelate, smooth to punctate, some with posterodorsal spine; dorsum straight to gently convex; valves unequal, larger overlapping smaller along free margin, subovate to elongate-ovate, ends broadly rounded; hinge channel straight or interrupted at ends by faint to moderately strong posterior and anterior cardinal indentations where overlap begins; one valve may slightly overreach other dorsally, but dorsal shoulders usually of equal height.

<==Paraparchitidae [Paraparchitacea, Paraparchitoidea]
    |--Coelonella Swartz 1936 CB86
    |    `--C. longula (Chen 1958) [=Microcoelonella longula] CB86
    |--Chamishaella Sohn 1971 ZL87
    |    `--C. carbonaria ZL87
    |--Shemonaella Sohn 1971 S82
    |    `--S. dutroi Sohn 1971 S82
    |--Paraparchites Ulrich & Bassler 1906 CB86
    |    |--P. inornatus CB86
    |    |--P. orbiculatus CB86
    |    `--P. texanus CB86
    |--Proparaparchites Cooper 1941 HM04
    |    |--P. fabulus Cooper 1941 HM04
    |    |--P. ovatus Cooper 1941 HM04
    |    `--P. parallelus Cooper 1946 HM04
    `--Shivaella Sohn 1971 HM04
         |--S. brazoensis (Coryell & Sample 1932) (see below for synonymy) HM04
         |--S. cyclopea (Girty 1910) HM04
         |--S. macallisteri Sohn 1972 HM04
         `--S. nicklesi (Ulrich 1891) [=Leperditia nicklesi] HM04

Shivaella brazoensis (Coryell & Sample 1932) [=Paraparchites brazoensis; incl. P. oblongus Coryell & Sample 1932, P. palopintoensis Coryell & Sample 1932] HM04

*Type species of generic name indicated

REFERENCES

Benson, R. H., J. M. Berdan et al. 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.

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

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

[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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