Bairdia

Bairdia, copyright Moorea Biocode.


Belongs within: Bairdiidae.

Bairdia is a genus of ostracods with a fossil record extending from the Ordovician to the present day (Benson et al. 1961).

Characters (from Benson et al. 1961): Carapace mostly elongate fusiform in lateral view, with broadly arched dorsum that becomes concave terminally, especially at the rear; venter centrally straight but curved upward terminally so that extremities are nearly at mid-height, anterior end generally higher and better rounded than posterior, which is generally acuminate; in dorsal view, lateral outlines symmetrically convex and extremities acuminate; surface of valves smooth, punctate, or rarely with protuberances; left valve larger than right valve, mostly overreaching it around entire margin and overlapping it, especially ventrally, around contact margin. Short ridge-and-groove hingement commonly marked by prominent cardinal angles, especially in right valve; contact margins complex, with wide duplicature, vestibule, and associated structures; adductor-muscle scar pattern of several discrete spots.

<==Bairdia M’Coy 1844 HM04
    |--B. acuminata Cooper 1946 HM04
    |--B. aliger (Guseva 1971) ZL87
    |--B. altiacuta CB86
    |--B. beedei CB86
    |--B. bicornis Bradfield 1935 ZL87
    |--B. calida CB86
    |--B. citriformis CB86
    |--B. crassa Harlton 1929 HM04
    |--B. cristata CB86
    |--B. deloi (Bradfield 1935) ZL87
    |--B. demissa CB86
    |--B. eissensis Upson 1933 ZL87
    |--B. firmata ZL87
    |--B. garrisonensis Upson 1933 S82
    |--B. girtyi Sohn 1960 HM04
    |--B. grahamensis Harlton 1928 HM04
    |--B. guanxiensis Guan 1978 CB86
    |--B. harltoni Cooper 1946 HM04
    |--B. hassi Sohn 1960 ZL87
    |--B. kwanshanensis CB86
    |--B. lungtanensis CB86
    |--B. mandelstami CB86
    |--B. marginicompressa Chen & Bao 1986 CB86
    |--B. menardensis Harlton 1929 ZL87
    |--B. modica CB86
    |--B. monstrabilis Cooper 1946 ZL87
    |--B. permagna Geis 1932 HM04
    |--B. piscariformis CB86
    |--B. pompilioides Harlton 1928 HM04
    |--B. postacuta CB86
    |--B. radlerae Kellett 1934 ZL87
    |--B. seminalis (Kellett 1934) ZL87
    |--B. symmetrica ZL87
    |--B. trianguliformis CB86
    |--B. verdesensis LeRoy 1943 S-VC91
    |--B. verwiebei ZL87
    |--B. whitesidei Bradfield 1935 HM04
    `--B. zhongyingensis Wang 1978 CB86

*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.

[S-VC91] Segura-Vernis, L. R., & A. L. Carreño. 1991. Foraminíferos y ostrácodos de la Laguna de La Paz, Baja California Sur, México. Inv. Mar. CICIMAR 6 (1): 195-224.

[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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