The first report on the occurrence of twins in a freshwater crayfish, Pacifastacus leniusculus (Decapoda, Astacoidea).
Twin stage 1 juveniles from the signal crayfish, Pacifastacus leniusculus, were observed in this study. No such observations have been found in the literature. The twins consist of two stage 1 juveniles that are fused at the head. Each juvenile has a separate abdomen and thorax and has the appropriate number of appendages and a telson, all characteristic of a normal stage 1 juvenile.
The University of Firat, Fisheries Faculty, 23119 Elazig, Turkey. mharlioglu@hotmail.com
Muzaffer M
MM
Harlioğlu
D000818:Animals; D003400:Astacoidea / Q000033:anatomy & histology / Q000502:physiology*; D005618:Fresh Water; D038522:Twinning, Monozygotic / Q000502:physiology*