| Abstrak/Abstract |
Brachyuran crabs are grouped into 53 families spread all over the world. In Indonesia, there
are 40 non-freshwater crab families and three endemic freshwater crab families, namely:
Potamidae, Gecarcinudae, and Parathelpusidae. Carapace and chela (claws) of crabs are
body parts that are used to determine taxonomical identification. In Indonesia has been
found several fossil fragments of crabs and mostly are carapace and chela. There were no
guidance to determine the taxonomical identification of fossils crabs based on its carapace
and chela, so it needs to be studied. Therefore, this study aims to examine the morphological
characters of carapace and claws as diagnostic characters of crabs so that they can be used
in the identification of crab fossils. The specimens studied were collection of the Laboratory
of Animal Systematics, Faculty of Biology, Universitas Gadjah Mada. The method used are
the comparison of morphology and characteristics of carapace and claws and reference
studies. The results showed that the characteristics of the carapace and claws, including:
carapace shape, lateral and dorsal carapace ornamentation, enlarged claws, tubercles on the
claw teeth, and claw shape, can be used as references to determine the taxonomical group of
brachyuran fragments fossils found in Indonesia especially in Java Island.
Keywords: Crab, Identification, Carapace, Chela, Java |
