Article

A New species of the genus Lightiella : the first record of Cephalocarida ( Crustacea ) in Europe

DOI:Carcupino, Marcella and Floris, Antonello and Addis, Alberto and Castelli, Alberto and Curini Galletti, Marco (2006) A New species of the genus Lightiella: the first record of Cephalocarida (Crustacea) in Europe. Zoological Journal of the Linnean Society, Vol. 148 (2), p. 209-220. eISSN 1096-3642. Article.
Source: OAI

ABSTRACT A new species of Cephalocarida belonging to the genus Lightiella is described. Like all known species of Lightiella , the new species is characterized by reduction of trunk segment 8, which also lacks both pleura and thoracopods. The diagnostic characters of the species are: (1) one seta on the inner distal corner of the penultimate endopodal segment of second maxilla and thoracopods 1-5; (2) only one claw on the distal segment of the endopod of thoracopod 6. A cladistic analysis of 27 morphological characters was used to estimate the phylogeny of all species of Lightiella , with all other cephalocarid species used as outgroups. The discovery of this species in the Mediterranean fills a gap in the distribution of the genus and of the entire class.

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Keywords

27 morphological characters
 
cephalocarid species
 
Cephalocarida
 
cladistic analysis
 
diagnostic characters
 
distal segment
 
entire class
 
genus Lightiella
 
inner distal corner
 
Lightiella
 
Mediterranean fills
 
new species
 
outgroups
 
penultimate endopodal segment
 
second maxilla
 
seta
 
thoracopod 6
 
thoracopods
 
thoracopods 1-5
 
trunk segment 8