Other formats

    Adobe Portable Document Format file (facsimile images)   TEI XML file   ePub eBook file  

Connect

    mail icontwitter iconBlogspot iconrss icon

Deep-Water Crustacea of the Genus Sergestes (Decapoda, Natantia) from Cook Strait, New Zealand

Order Decapoda — Suborder Natantia — Section Penaeidea — Family Sergestidae — Subfamily Sergestinae — Genus Sergestes M.-Edwards, 1830

Order Decapoda
Suborder Natantia
Section Penaeidea
Family Sergestidae
Subfamily Sergestinae
Genus Sergestes M.-Edwards, 1830.

  • 1830. Sergestes M.-Edw., Ann. Sci. Nat. Zool. XIX: 348.
  • 1896. Sergestes Hansen, Proc. Zool. Soc. London 1896: 936 (review of genus).
  • 1919. Sergestes Hansen, Siboga Exped. XXXVIII: 2.
  • 1922. Sergestes Hansen, RéAs. Camp. Sci. Monaco LXIV: 11 (key to Atlantic species).
  • 1950. Sergestes Barnard, Ann. S. Afri. Mus. XXXVIII: 638.

Sergestidae with first 3 pairs of pereiopods elongate, slender, with stiff outstanding setae; 1st pereiopod without proper chela; 2nd and 3rd pereiopods nearly always with very small chelae; 4th and 5th pereiopods with 6 segments, the dactyli being absent, 5th much shorter than 4th, one or both being natatory. 1st maxilla with palp; 2nd maxilla with 2 lobes; 1st maxilliped with segmented palp. Branchial lamellae as well as arthrobranchs; 2 arthrobranchs on 4th pereiopod, none on 5th. Petasma with processus ventralis not forked. (Adapted here from Barnard, 1950.)

The type species of the genus is Sergestes atlanticus M.-Edw., 1830. At least 57 adult species are currently accepted, mostly pelagic in tropical and subtropical seas. Three different types of luminous organs occur in the genus, though no species has more than one type and some have none at all. The larval development is aberrant among the Decapoda and certain specialised names are used. The first stage is the nauplius (see Gordon, 1955), followed by the elaphocaris (protozoea), the acantho-soma (zoea) and the mastigopus (post-larval) stages.