Halocyprida

Right view of carapace of adult male Danielopolina wilkensi, from Kornicker & Iliffe (1995).


Belongs within: Ostracoda.
Contains: Polycopidae.

The Halocyprida is a mostly planktonic group of ostracods, with a long exopod on the second antenna and a leg-like fifth limb.

Characters (from Anne C. Cohen): Adult carapace length 0.1-3 mm; shape varied, elongate subquadrate to almost circular; anterior rostrum often present; anterior incisur present or absent; posterior keel absent, occasionally posterodorsal corner-shaped process or spine present. Six to eight limbs present. Second antenna with exopod larger than endopod; 9 exopod articles; 2-3 endopod articles; male endopod often with hook-like clasper. Mandible with proximal endite present as a cusped tooth; basis endite often with a cusped tooth; endopod with dorsal and sometimes ventral setae; exopod present (one article only) or absent. Sexual dimorphism in limbs usually absent (rarely present in fifth and sixth limbs). Fourth limb with exopod present (1-2 articles) or absent; endopod with 2-3 articles. Fifth limb leg-like; endopod present and jointed; exopod present or absent. Sixth limb present or absent, limb-like if present; proximal setose branchial plate (epipod) sometimes present; endopod present; exopod present (one article only) or absent. Seventh limb present (as reduced lobe with few setae) or absent. Copulatory limb (eighth limb or hemipenis) single, unbranched or with two branches.

<==Halocyprida MD01
    |--Halocypridina MD01
    |    |--Halocypris Dana 1853 [Halocyprididae, Halocypridoidea] MD01
    |    `--Thaumatocyprididae [Thaumatocypridacea, Thaumatocypridoidea] MD01
    |         |--Danielopolina Kornicker & Sohn 1976 DH86
    |         |    |--D. orghidani (Danielopol 1972) DH86
    |         |    `--D. wilkensi Hartmann 1985 DH86
    |         `--Welesia kornickeri (Danielopol, Baltanas & Humphreys 2000) PH13
    `--Cladocopina [Cladocopida] MD01
         |  i. s.: Discoidella Croneis & Gale 1938 ZL87
         |           |--D. henanensis Zhang in Zhang & Liang 1987 ZL87
         |           |--D. pendens (Croneis & Gutke 1939) ZL87
         |           `--D. xingyangensis Zhang in Zhang & Liang 1987 ZL87
         `--Polycopidae MD01

*Type species of generic name indicated

REFERENCES

[DH86] Danielopol, D. L., & G. Hartmann. 1986. Ostracoda. In Stygofauna Mundi: A Faunistic, Distributional, and Ecological Synthesis of the World Fauna inhabiting Subterranean Waters (including the Marine Interstitial) (L. Botosaneanu, ed.) pp. 265-294. E. J. Brill / Dr. W. Backhuys: Leiden.

Kornicker, L. S., & T. M. Iliffe. 1995. Ostracoda (Halocypridina, Cladocopina) from an anchialine lava tube in Lanzarote, Canary Islands. Smithsonian Contributions to Zoology 568: 1-32.

[MD01] Martin, J. W., & G. E. Davis. 2001. An updated classification of the Recent Crustacea. Natural History Museum Los Angeles County, Science Series 39: 1-124.

[PH13] Poore, G. C. B. & W. F. Humphreys. 2013. Bunderanthura bundera gen. et sp. nov. from Western Australia, first anchialine Leptanthuridae (Isopoda) from the Southern Hemisphere. Records of the Western Australian Museum 28 (1): 21-29.

[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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