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Archeolourinia shermani, a new genus and species of Louriniidae (Copepoda: Harpacticoida) from a Caribbean mesophotic zone

Published online by Cambridge University Press:  21 September 2012

P.H.C. Corgosinho  and
N.V. Schizas
P.H.C. Corgosinho*
Affiliation:
Foundation Unesco/HidroEx, Avenida Professor Mário Palmério 1000, 38200-000, Frutal-MG, Brazil Department of Human Sciences, State University of Minas Gerais-UEMG/Campus Frutal, Avenida Professor Mário Palmério 1000, 38200-000, Frutal-MG, Brazil
N.V. Schizas
Affiliation:
Department of Marine Sciences, University of Puerto Rico, Mayagüez, Call Box 9000, Mayagüez, PR 00681, USA
*
Correspondence should be addressed to: P.H.C. Corgosinho, Foundation Unesco/HidroEx, Avenida Professor Mário Palmério 1000, 38200-000, Frutal-MG, Brazil email: [email protected]
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Abstract

Mesophotic coral ecosystems (MCEs) are found on the insular and continental slopes of Caribbean islands and comprise mainly scleractinian corals, sponges and macroalgae. These species provide habitat for a highly diverse and specialized crustacean fauna. A new genus and species of the family Louriniidae is described from samples taken from an MCE in south-west Puerto Rico. The new taxa can be diagnosed by: body elongate, almost cylindrical and with inconspicuous podoplean boundary between prosome and urosome; double genital somite with a discontinuous chitinized cuticular ridge; telson short with rectangular anal operculum; furca short; rostrum sinusoidal, well defined at the base; antennules 7-segmented with aesthetasc on the fourth segment; antenna with a brush-like basal seta and an abexopodal seta, exopod 1-segmented with 2 setae; endopod with 7 elements (1 geniculate seta and 1 modified inner spine); maxilliped well developed, prehensile, composed of syncoxa, basis, one segmented endopod and one claw-like apical seta; leg 1 endopod 3-segmented, first segment with a modified inner seta; legs 2, 3 and 4 with 2-segmented endopod with inner seta on the first segment; leg 5 basendopod fused, well developed with 4 setae, exopod well developed, with 5 setae; leg 6 represented by a single seta; and genital slits wide apart. The new genus and species can be confidently assigned to the family Louriniidae on the basis of the following synapomorphies: rostrum well-developed with rounded tip; antennule of female 7-segmented; mandible palp reduced; maxillule endopod and exopod absent; maxillae endopodite 2 represented by 3 setae; leg 5 basoendopod of female confluent, intercoxal sclerite absent, exopod 1-segmented; eggs retained in a single ventral egg sac; telson shorter than last urosomite; and furca short and with 6 setae.

Keywords

mesophotic coral ecosystemsPuerto RicoLouriniidaeHarpacticoidanew genusnew species
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 93 , Issue 3 , May 2013 , pp. 651 - 657
Copyright
Copyright © Marine Biological Association of the United Kingdom 2012

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