Hippoid crab is a crustacean group which inhabits sandy beach in tropical and subtropical areas. There are seven species of hippoid crab has been reported from Indonesia so far, i.e. six from family Hippidae and one from family Albuneidae. One of them is Hippa admirabilis Thalwittz, 1891. This species is first record from Tomini Bay, province in our study. The Specimens were collected from Tomini Bay in 2016. To confirm the species, we used CO1 gene as DNA barcoding. The DNA was extracted from the muscle tissues. The upper part of CO1 gene was amplified using Primer AF215-216. The CO1 gene that we retrieved was 634 bp. The samples from our study have about 99.8% similarity with the sequence of Hippa admirabilis in Genebank with the accession number is KR047031.1. Based on morphological and molecular data, our samples are confirmed as H. admirabilis.
Hippoid crab is crustacean species which inhabits sandy beach in tropical and subtropical area. One of them is Hippa admirabilis. Previously, this species was reported only in Sulawesi Island in Indonesia beside Taiwan and New Guinea. The aim of this study was to elucidate the genetic variation of Hippa admirabilis in Northern Sulawesi. Ten specimens were collected from two locations in the northern part of Sulawesi in 2016 which is Ogotumubu (Province of Central Sulawesi) and Gorontalo (Province of Gorontalo). The length of the amplified CO1 gene fragment is 596 bp. The obtained sequences are compared to our previous work in Genbank which is Hippa admirabilis from Banggai, Sulawesi. The phylogenetic tree was constructed to phylogeographic scenario based on Neighbor-Joining methods with Kimura 2-parameters models. The haplotype analysis was performed using DnaSP software. The phylogenetic tree shows that all of the H. admirabilis samples assembled into one clade. Five haplotypes of Hippa admirabilis was discovered in this study. There is one shared haplotype group with ten individuals from Gorontalo and Ogotumubu. The rest haplotype is exclusive belongs to each location. The nucleotide variation between Gorontalo, Ogotumubu, and Banggai (as reference sequence) was 8 nucleotide bases.
All previous reports of the genus Emerita from Indonesia have only identified one species, namely Emerita emeritus, which was found on the west coast of Sumatera and the south and northern coast of Java. Previous studies expected that other species, related to Emerita emeritus, should be found in southern Java.
We report a new species of Emerita, which was found on Pangandaran Beach, in an intertidal area, within the southern beach of Java, near Citonjong Estuary. We compared the specimen from a nearby location, that is from Cilacap and the collection of Emerita emeritus from Bengkulu. Here, we describe and illustrate the species.
The report of genus Emerita from Indonesia has only contained one species, namely Emerita emeritus. They were found on the west coast of Sumatera and the south coast of Java. Although Indonesia is the number two country in the world that has long beaches and is dominated by sandy beaches, as the preferred habitat for sand crabs, reports regarding these biotas in Indonesia are still limited. The previous studies have expected about the occurrence of the other species which was related to Emerita emeritus in Southern Java.
We reported the new species of Emerita which was found in Pangandaran beach, West Java. We found it in an intertidal area, near Citonjong Estuary. Here, we described and illustrated the species.
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