Australatya obscura Han and Klotz, 2015

Inui, Naoto, Maruyama, Tomoaki & Okamoto, Ken, 2019, First record of Australatyaobscura Han & Klotz, 2015 (Decapoda, Atyidae) from the Ryukyu Islands, Japan, Biodiversity Data Journal 7, pp. 30507-30507 : 30507

Australatya obscura Han and Klotz, 2015

Materials

Type status: Other material. Occurrence: catalogNumber: KPM-NH 3213 ; recordedBy: Naoto Inui; individualCount: 1; sex: female; lifeStage: adult; reproductiveCondition: non-ovigerous; disposition: in collection; Taxon: scientificName: Australatyaobscura; order: Decapoda; family: Atyidae; genus: Australatya; Location: higherGeography: East Asia; islandGroup: Ryukyu Islands; island: Ishigaki island; country: Japan; countryCode: Japan/JP; stateProvince: Okinawa; county: Ishigaki; municipality: Nosoko; locality: the Fukido river ; verbatimCoordinates: 24°28.92'N, 124°14.17'E; Identification: identifiedBy: Tomoaki Maruyama and Naoto Inui; dateIdentified: 2018-03-11; Event: samplingProtocol: hand net; year: 2018; month: 3; day: 11; habitat: freshwater river; Record Level: institutionCode: Kanagawa Prefectural Museum of Natural History (KPM); basisOfRecord: Preserved Specimen

Diagnosis

The specimen was a non-ovigerous adult female with carapace length 6.5 mm and rostral formula 0/4. The third maxilliped was slender, lacking terminal spiniform seta. The merus of the third pereiopod had a row of plumose setae. The live specimen had black and white vertical bands on the abdominal segments (Fig. 1). The morphological features and live colouration of the specimen agreed well with the original description of Australatya obscura ( Han and Klotz 2015).

Distribution

Japan: Ishigaki Island (this study); Taiwan; Philippines: Panay Island

Habitat

The collection site was a wooded section of the middle reaches of the Fukido River (Fig. 2). Sediment at the site comprised pebbles and cobbles. The water temperature was 14.8°C and depth about 0.2 m. Other atyid shrimps and palaemonid prawns caught in the same habitat included Atyopsis spinipes (Newport, 1847), Caridina laoagensis Blanco, 1939, C. macrodentata Cai and Shokita, 2006, C. typus H. Milne Edwards, 1837, Macrobrachium lar (Fabricius, 1798), M. latimanus (von Martens, 1868), M. placidulum (De Man, 1892), Macrobrachium sp. 1 (Japanese name: “Chura-tenaga-ebi”) and Macrobrachium sp. 2 (Japanese name: “Kasuri-tenaga-ebi”).