Aulopareia cyanomos (Bleeker, 1849)

Sen, Arya, Sreeraj, Chemmencheri Ramakrishnan & Raghunathan, Chelladurai, 2023, First report of two euryhaline gobiid fishes (Gobiidae Cuvier, 1816) from West Bengal, India, Species (e 29 s 1512) 24 (73), pp. 1-8 : 3

Aulopareia cyanomos (Bleeker, 1849)

1849. Gobius cyanomos Bleeker, Verhandelingen van het Bataviaasch Genootschap van Kunstenen Wetenschappen , 22:6

1989. Acentrogobius cyanomos (Bleeker, 1849) . Ataur Rahman, A. K. Freshwater fishes of Bangladesh. The Zoological Society of Bangladesh. ii-xvii + 1-364

2022. Aulopareia cyanomos (Bleeker, 1849) . Larson, H. K. and Z. Jaafar, A review of the gobiid fish genus Aulopareia ( Gobiidae : Gobiinae) with description of a new species from Kuwait and discussion of the status of Gobius cyanomos Bleeker. Zootaxa 5155 (no. 4): 493-516.

Common Name

Threadfin blue goby

Conservation Status

Least Concern (IUCN 3.1) (IUCN Red List)

Material examined

ZSI/SbRC/KN 2852, 1 ex., TL 11.6cm, SL 9.2cm, Dhanchi Island , Sunderban Biosphere Reserve (21°42'34.77"N; 88°27'25.63"E), 1.3.2020, Coll: Arya Sen .

Diagnostic Characters

1 st Dorsal spines 6; 2 nd Dorsal spine 1; 2 nd Dorsal soft rays 11; Anal spine 1; Anal soft rays 9; Ventral spine 1; Ventral soft rays 5; Pectoral soft rays 20; Caudal soft rays 12. Body rounded in lateral profile anteriorly but laterally compressed posteriorly, snout is flattened. Head moderately cylindrical; jaws equal; gill opening not extended anteriorly. Some spines of first dorsal in the middle elongate. Pelvic fins united medially; presence of frenum. Most scales ctenoid; scales on pectoral base, breast, nape cycloid; naked operculum. Pores, sensory canals present on head; longitudinal sensory papillae rows on cheek. Caudal fin is diamond shaped with pointed end. Dorsal profile of head slanted downward anteriorly, Caudal peduncle without groove. Interorbital space little convex. Body-color of the dorsal profile is light brown to yellow and little silvery ventrally. Black triangular spot present just above dorsal of gill opening. 5 mid-lateral dusky spots on body. Numerous pale blue-green spots on body, dorsal and caudal fin.2 nd dorsal and anal dark bearing reddish outer edge. Ventral and most of the caudal fins grey. Caudal fin having a dark Red to Orange coloration on the dorsal margin ( Figure 2a, b ). Detailed measurement of the specimen is given ( Table 1).

Habitat

River Channel, Brackish Water (Salinity: 3-5 ppt).

Distribution

India: Mangroves of Tamilnadu, Odisha, Andhra Pradesh ( Chakraborty et al., 2017). Elsewhere: Thailand, Malaysia, Indonesia, Bangladesh, China, Philippines and Fiji Islands ( Vasileva and Bogorodskii, 2004; AqGRISI, 2019).

Remarks

Type specimen was collected from Madura Straits near Surabaya and Kammal, Java, Indonesia (AqGRISI, 2019). This species was first described as Gobius cyanomos by Bleeker in 1849. Later Ataur Rahman 1989 placed this species under Acentrogobius 7. Larson and Zafar, 2022 placed the species under the genus Aulopareia Smith, 1945 . Presence of elongated infraorbital pore and absence of postorbital pore and presence of a single inter-orbital pore are the characters, which distinguishes Aulopareia from Acentrogobius .

Figures

Figure 2 Photographs of newly reported fishes. A & B: Fresh and preserved specimen of Acentrogobius cyanomos (Bleeker, 1849). C & D: Fresh and preserved specimen of Stigmatogobius yanamensis Rao, 1971.