A method for distinguishing the females and late copepodites of three species of Boeckella

Abstract

Consistent differences in the morphology of the last metasomal segment and genital segment were found among adult female Boeckella triarticulata, B. dilatata, and B. hamata. These differences are taxonomically useful in collections where males are sparse. Distinguishing features used to classify CIII‐CV B. triarticulata, B. dilatata, and B. hamata of co‐occurring populations to species are also described. The diagnostic features of both adult female and copepodites may be used at low magnifications.

Keywords:

• taxonomy
• calanoid copepods
• Boeckella triarticulata
• Boeckella dilatata
• Boeckella hamata
• adult female
• copepodites
• morphology

Notes

Present address: Department of Biological Sciences, University of Waikato, Private Bag, Hamilton, New Zealand