Rec. zool. Surv. India: Vol. 120(3)/289–291, 2020 ISSN (Online) : 2581-8686 DOI: 10.26515/rzsi/v120/i3/2020/149800 ISSN (Print) : 0375-1511 First report of the Paratrypauchen Murdy, 2008 (: : ) from the Odisha coast, India

Haradhan Ruidas1, Swarup Ranjan Mohanty2, Saumyapriya Rana1, Sanmitra Roy2 and Anil Mohapatra2* 1Indian Institute of Science Education and Research, Berhampur – 760010, Odisha, India 2Estuarine Biology Regional Centre, Zoological Survey of India, Gopalpur-on-Sea, Ganjam, Odisha – 761002, India Email: [email protected]

Abstract Present study reports a comb , Paratrypauchen microcephalus (Bleeker, 1860), genus Paratypauchen fromP. Odisha microcephalus coast for from the first Odisha time. coast The Murdy (2008) is monospecific, with scaleless abdomen and a subdermal or only slightly exposed, smooth frontal crest. The paper deals with the meristic and morphological details of in details. Keywords:

Arjyapalli, , Gobiidae, New Record Introduction substrate (Larson & Lim, 2005) and feeds on benthic invertebrates such as (Chen & Fang, 1999). The Gobiid fishes show remarkable morphological The present paper reports Paratrypauchen and ecological variability with a large number of microcephalus for the first time from the Odisha coast (Zander, 2011). are globally distributed based on the study of two specimens collected from and occur in marine, freshwater and brackish habitats Arjyapalli, Odisha. (Knebelsberger & Thiel, 2014). Along Odisha coast, the total number of marine and estuarine fish species reported is 605 under 138 families and includes about 47 Material and Methods fishes under family Gobiidae (Barmanet al., 2007). One During local survey two fish samples of family Gobiidae more species Periophthalmus novemradiatus (Hamilton, were collected from Arjyapalli fish landing centre, Odisha 1822) reported by Mitra et al., (2010) increase the (19°18’38.91” N and 84°58’20.68” E). After collection, number of Gobiidae to 48 along Odisha coast. Recently the specimens were photographed and the detail the authors collected two specimens from the morphometric measurements taken in fresh condition, group of subfamily Amblyopinae characterized in having then preserved in 10% formaldehyde solution. All dorsal and anal fin connected to caudal fin by membrane. measurement was made by digital caliper. The counting The Trypauchen group includes seven genera, of which of the spines, rays and scales were carried out by Leica s9i six are known from India (Murdy, 2008). Murdy in the digital stereo microscope. The collected specimens were year, 2008 reported a new genus Paratrypauchen with subsequently identified as Paratrypauchen microcephalus key to the genus of the Trypauchen group. The genus following Murdy (2008). The specimens were registered Paratypauchen is monospecific and currently known from with registration number F11297 and deposited in Paratrypauchen microcephalus (Bleeker, 1860). This goby Estuarine Biology Regional Centre, Zoological Survey of is common in estuaries and coastal areas with muddy India, Gopalpur-on-Sea, Odisha.

* Author for correspondence Article Received on: 23.12.2019 Accepted on: 14.02.2020 First report of the genus Paratrypauchen Murdy, 2008 (Gobiiformes: Gobiidae: Amblyopinae)...

Results Table 1. Morphometric characteristics of Paratry- pauchen microcephalus (Bleeker, 1860) Systematic Accounts Characters Measurements (mm) Phylum CHORDATA Total Length 63.4 – 110 Class Standard Length 54.3 – 92.5 Order GOBIIFORMES In standard length Family GOBIIDAE Body depth at origin 7.1 – 7.3 Subfamily AMBLYOPINAE Body depth at anus 7.3 – 8.2 Paratrypauchen microcephalus (Bleeker, 1860) Height of dorsal fin 28.0 – 28.6

1860. Trypauchen microcephalus Bleeker, Acta Societatis Regiae Length of soft dorsal fin base 1.4 – 1.5 Scientiarum Indo - Neêrlandicae, 8(4): 62 (Sungiduri, Indo- Length of anal fin base 1.6 nesia). Predorsal length 4.5 – 4.7 Material examined: EBRC/ZSI F11297, 2 ex., 63.4 – 110 Preanal length 2.7–2.8 mm, Arjyapalli fish landing centre, Odisha, 07.vii.2019, Head length 5.4– 6.0 Haradhan Ruidas and Swarup Ranjan Mohanty. In head length Diagnostic characters: Body elongated and laterally compressed. Head slightly compressed and scaleless, 5.4 Pectoral fin length 2.8 –3.4 – 6.0 in standard length (SL), preanal length 2.7 – 2.8 length 3.9 – 4.3 in SL (Table 1). Eye, 17.1 – 20.2 in head length dorsal Snout length 5.1 – 6.7 margin of having a pouch-like cavity, frontal crest subdermal and no serration along dorsal margin. Inter -orbital space 8.6 – 9.8 Abdomen scaleless and pelvic fins connected medially Eye diameter 17.1 – 20.2 but not emarginated posteriorly and without disc. Maxilla (upper jaw) length 3.6 –3.9 Longitudinal scale rows 62 – 69. Mouth large and oblique upper and lower jaws with three rows of slightly curved Mandible (lower jaw) length 3.3 –3.4 canine teeth medially and two rows laterally. The pelvic Dorsal spine VI fin connected medially but emarginated posteriorly. Dorsal soft rays 49 – 51 Scales cycloid and extend from just dorsal to pectoral fin Pectoral spines 0 base to caudal fin. Pectoral rays 17 Colour: Body reddish pink in colour; head light pink; dorsal, Pelvic spine I anal and the caudal fins whitish pink; colour of the scaleless abdomen portion white. In preserved specimen, the body Pelvic rays 5 whitish gray and fins are ducky in colour (Figure 1). Anal spine 0 Distribution: Paratrypauchen microcephalus is reported Anal rays 43 – 46 from Japan, Taiwan, Philippines, Australia, Indonesia, Singapore, Malaysia, Vietnam, India, Mozambique, and Discussion South Africa (Murdy, 2008). In India, it is reported from Andaman (Rajan et al., 2013), Sundarbans, West Bengal Comparison among the species of Trypauchen group is (Chatterjee et al., 2013), Tamil Nadu (Mogalekar et al., difficult due to their very similar in external appearance. 2017) and Maharashtra (Singh & Yazdani, 1993). The genusParatrypauchen having only one species,

290 Vol 120(3) | 2020 | www.recordsofzsi.com Zoological Survey of India Haradhan Ruidas, Swarup Ranjan Mohanty, Saumyapriya Rana, Sanmitra Roy and Anil Mohapatra

Ctenotrypauchen is with scales; Paratrypauchen have a subdermal or only slightly exposed, smooth frontal crest, but in Ctenotrypauchen, frontal crest prominently exposed and serrated. The first report of the species from Odisha coast increases the numbers of Gobiidae species along the Odisha coast to 49. Paratrypauchen microcephalus not reported earlier probably due to the misidentification. It might be treated as other Amblyopin species of Trypauchen group such as , due to its close affinities. Now both the species can easily identify by means of its absence (Paratrypauchen microcephalus) and presence (Trypauchen vagina) of abdominal scales.

Figure 1. (A) Paratrypauchen microcephalus (Bleeker, Acknowledgements 1860), (B) Paratrypauchen microcephalus show- ing scaleless abdomen. We thank Dr. Kailash Chandra, Director, Zoological Survey of India, for providing necessary working facilities. P. microcephalus was identified asCtenotrypauchen We also thank Shri Subhrendu Sekhar Mishra, Marine microcephalus by many authors earlier. Murdy (2008) Fish Section, Zoological Survey of India for his scientific separate these two genera by some typical characters: advice. abdomen of Paratrypauchen lacking scales whereas

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