Phylogeny and classification of the shrimp genera Acetes, Peisos, and Sicyonella (Sergestidae: Crustacea: Decapoda)

TY - JOUR

T1 - Phylogeny and classification of the shrimp genera Acetes, Peisos, and Sicyonella (Sergestidae: Crustacea: Decapoda)

AU - Vereshchaka, Alexander L.

AU - Lunina, Anastasia A.

AU - Olesen, Jørgen

PY - 2016/6/1

Y1 - 2016/6/1

N2 - Despite their role in marine systems, Sergestidae remain one of the most poorly understood families amongst planktonic shrimps with regard to phylogeny. Recent morphological and phylogenetic revisions of a number of sergestid genera have disentangled classificatory problems and emphasized the importance of reproductive structures for the taxonomy and phylogeny of the Sergestidae. Only three genera, Acetes, Peisos, and Sicyonella, remain unrevised phylogenetically. We undertook a phylogenetic analysis of these groups based on 124 morphological characters (120 binary, four multistate). Eighteen new characters were based on scanning electron microscopy studies of the clasping organ and petasma. The phylogenetic analysis revealed statistically supported monophyly of the clades Sicyonella and Acetes+Peisos. We combine Peisos and Acetes into a monophyletic genus Acetes, give emended diagnoses and keys to all species of Sicyonella and Acetes, and discuss morphological trends within these genera. We present maps of geographical distribution for all valid species of Acetes.

AB - Despite their role in marine systems, Sergestidae remain one of the most poorly understood families amongst planktonic shrimps with regard to phylogeny. Recent morphological and phylogenetic revisions of a number of sergestid genera have disentangled classificatory problems and emphasized the importance of reproductive structures for the taxonomy and phylogeny of the Sergestidae. Only three genera, Acetes, Peisos, and Sicyonella, remain unrevised phylogenetically. We undertook a phylogenetic analysis of these groups based on 124 morphological characters (120 binary, four multistate). Eighteen new characters were based on scanning electron microscopy studies of the clasping organ and petasma. The phylogenetic analysis revealed statistically supported monophyly of the clades Sicyonella and Acetes+Peisos. We combine Peisos and Acetes into a monophyletic genus Acetes, give emended diagnoses and keys to all species of Sicyonella and Acetes, and discuss morphological trends within these genera. We present maps of geographical distribution for all valid species of Acetes.

U2 - 10.1111/zoj.12371

DO - 10.1111/zoj.12371

M3 - Journal article

SN - 0024-4082

VL - 177

SP - 353

EP - 377

JO - Zoological Journal of the Linnean Society

JF - Zoological Journal of the Linnean Society

IS - 2

ER -