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Journaloffthreattenedtaxa OPEN ACCESS The Journal of Threatened Taxa fs dedfcated to bufldfng evfdence for conservafon globally by publfshfng peer-revfewed arfcles onlfne every month at a reasonably rapfd rate at www.threatenedtaxa.org . All arfcles publfshed fn JoTT are regfstered under Creafve Commons Atrfbufon 4.0 Internafonal Lfcense unless otherwfse menfoned. JoTT allows unrestrfcted use of arfcles fn any medfum, reproducfon, and dfstrfbufon by provfdfng adequate credft to the authors and the source of publfcafon. Journal of Threatened Taxa Bufldfng evfdence for conservafon globally www.threatenedtaxa.org ISSN 0974-7907 (Onlfne) | ISSN 0974-7893 (Prfnt) Note Ffrst record of the Two-strfped Box Crab Calappa bflfneata Ng, Laf & Aungtonya, 2002 (Brachyura: Calappfdae) from St. Martfn’s Island, Bangladesh Muntasfr Akash & Mostafa A.R. Hossafn 26 January 2017 | Vol. 9| No. 1 | Pp. 9771–9773 10.11609/jot. 2943 .9.1. 9771-9773 For Focus, Scope, Afms, Polfcfes and Gufdelfnes vfsft htp://threatenedtaxa.org/About_JoTT.asp For Arfcle Submfssfon Gufdelfnes vfsft htp://threatenedtaxa.org/Submfssfon_Gufdelfnes.asp For Polfcfes agafnst Scfenffc Mfsconduct vfsft htp://threatenedtaxa.org/JoTT_Polfcy_agafnst_Scfenffc_Mfsconduct.asp For reprfnts contact <[email protected]> Publfsher/Host Partner Threatened Taxa Journal of Threatened Taxa | www.threatenedtaxa.org | 26 January 2017 | 9(1): 9771–9773 Note Ffrst record of the Two-strfped Box Crab Pacffc, Indfan Ocean and fn the Calappa bflfneata Ng, Laf & Aungtonya, Eastern Medfterranean (Sakaf 1976; 2002 (Brachyura: Calappfdae) from Daf & Yang 1991; Chen & Xu 1991; St. Martfn’s Island, Bangladesh Chen 1993; Galfl 1997; Holthufs ISSN 0974-7907 (Onlfne) 2001; Ng et al. 2002). The Indfan ISSN 0974-7893 (Prfnt) Muntasfr Akash 1 & Mostafa A.R. Hossafn 2 Subconfnent has been hftherto represented by efght Calappa OPEN ACCESS 1 House 37, Road 1, Block A, Bonosree, Dhaka 1219, Bangladesh specfes whfch are C. capellonfs 2 Department of Ffsh. Bfology & Genefcs, Bangladesh Agrfcultural (Laurfe, 1906), C. bflfneata Ng, Laf & Unfversfty, Mymensfngh 2202, Bangladesh 1 [email protected] (correspondfng author), Aungtonya, 2002 , C. exanthematosa 2 [email protected] Alcock & Anderson, 1894, C. gallus (Herbst, 1803), C. guerfnf Brfto-Capello, 1871, C. hepafca (Lfnnaeus, 1758), C. lophos (Herbst, 1782) and by C. pustulosa Alcock, 1896 Crabs fn the famfly Calappfdae are heterotrematan, (Galfl 1997; Deb 1999; Laf et al. 2006; Ahmed & Hossafn eubrachyuran specfes dfsfngufshed by thefr normal 2008; Kumar et al. 2007, 2013; Galfl & Ng 2010; Ng et al. ambulatory dactylf, trfangular merus of thfrd maxfllfpeds, 2011). As fnformafon on crustacean dfversfty from thfs buccal cavern wfthout canal and not paddle-lfke, the regfon fs sfll lfmfted, avaflable reports of Two-strfped Box rfght and always larger chela armed wfth a pafr of specfal Crab C. bflfneata are only from Srf Lanka, Andaman Sea, cufng teeth desfgned for ‘cufng’ open gastropods (Ng & Red Sea and from the western coast of Indfa (Ng et al. Tan 1984). Rounded, dome-shaped, ovate to transversely 2002; Kumar et al. 2013). Thfs present study records C. ovate carapace befng usually broader than long wfth wfng- bflfneata for the frst fme from Bangladesh as well as from lfke sfde extensfons that conceal the four pafrs of walkfng the northern part of the Bay of Bengal. legs; the broad, lat claws are held lfke shfelds, protecfng Safnt Marfn’s Island forms the southernmost part the crab’s front surface and complefng the box-lfke of Bangladesh lyfng fn the northeastern part of the Ba y appearance, hence, fmply thefr common name Box Crab of Bengal, about 9km of from the southern fp of Co x’s (Ng 1998; Ahmed & Hossafn 2008). Bazar-Teknaf penfnsula (Ffg. 1). Thfs small fsland (8km 2) fs Annotated checklfsts of bachyuran crabs publfshed by the only coral fsland of the country, an ecologfcally crffcal Ng et al. (2008) and of decapod crustaceans publfshed by area (ECA) and rfch fn marfne bfodfversfty. Grave et al. (2009) lfst nfne extant genera, wfth the genus As part of a survey of a BS (honours) study tour Calappa holdfng the largest dfversfty, represented by 43 conducted by the Department of Zoology, Unfversfty of specfes. Dhaka, two specfmens of box crabs were caught wfth a Calappfd crabs have a wfde dfstrfbufon, whereas, the beach sefne net from the northern beach fn front of the genus Calappa fs concentrated mostly along the Western Hotel Prfnce Heaven. Those box crabs were collected DOI : htp://dof.org/10.11609/jot.2943.9.1. 9771 -9773 | ZooBank: urn:lsfd:zoobank.org:pub:7C87B2A3-91C2-4FA1-BF1A-00313B5AF6EA Edftor: Bfju Kumar, Unfversfty of Kerala, Thfruvananthapuram, Indfa. Date of publfcafon: 26 January 2017 (onlfne & prfnt) Manuscrfpt detafls: Ms # 2943 | Recefved 29 July 2016 | Ffnal recefved 17 November 2016 | Ffnally accepted 10 January 2017 Cftafon: Akash, M. & M.A.R. Hossafn (2017). Ffrst record of the Two-strfped Box Crab Calappa bflfneata Ng, Laf & Aungtonya, 2002 (Brachyura: Calappfdae) from St. Marfn’s Island, Bangladesh . Journal of Threatened Taxa 9(1): 9771 –9773 ; htp://dof.org/10.11609/jot.2943.9.1. 9771 -9773 Copyrfght: © Akash & Hossafn 2017 . Creafve Commons Atrfbufon 4.0 Internafonal Lfcense. JoTT allows unrestrfcted use of thfs arfcle fn any medfum, reproduc - fon and dfstrfbufon by provfdfng adequate credft to the authors and the source of publfcafon. Fundfng: Department of Zoology, Unfversfty of Dhaka (fundfng the survey); World Bank and Forest Department, Mfnfstry of Envfronment and Forest, Government of the People’s Republfc of Bangladesh (fundfng IUCN Updafng Red Lfst Bangladesh Project). Compefng fnterests: The authors declare no compefng fnterests. Acknowledgements: We owe our graftude to the ‘IUCN Updafng Red Lfst Bangladesh Project’ (funded by World Bank and led by the Forest Department, MoEF, GoB) to create the sphere of thfs dfscovery. LOGOs 9771 Record of Calappa bilineata from St. Martin’s Island, Bangladesh Akash & Hossain et al. Figure 1 . Map depicting location at St. Martin’s Island where Calappa bilineata was collected. © Sanjoy Roy. live and then photographed, as part of the project Diagnosis: Two-striped Box Crabs as carapace with two entitled “Updating Species Red List of Bangladesh” led bold longitudinal stripes locating on median carapace, in by IUCN Bangladesh, the first ever attempt considering addition, the purplish to maroon longitudinally convex the crustacean fauna of Bangladesh was made (IUCN dorsal surface, laterally flattened chelae with multidentate Bangladesh 2015). The goal was to evaluate and dorsal margin. Legs were devoid of any pattern or texture; determine the biodiversity status, national abundance, outer surface of chelae were evenly colored. habitat condition of native crustaceans and depict their Description: Carapace is smooth and arched dorsally threats, to advance related conservation initiatives. The aided with small, flat tubercles on the front. Clypeiform project, in the process, sought after evidence of new structure highly prominent, edges frilled with setae. From records, rediscoveries and quality photographs. the structure, four teeth are projected laterally from These crab photographs were then submitted to IUCN posterior margin. As of Ng et al. (2002), anterolateral Bangladesh Team and later were identified as Calappa margin is crested and beaded. Posterior carapace margin bilineata, turning out to be a new record of box crab with seven well developed granulated, pale yellowish species within the geographical area of Bangladesh. teeth, median tooth sub-equal to adjacent teeth with distinct concavity. Lateral margin of second abdominal Class: Malacostraca Latreille, 1802 segment angular. Order: Decapoda Latreille, 1802 Habit and Habitat: During extraction from the seines, Infraorder: Brachyura Linnaeus, 1758 specimen showed noticeable aggression relative to the Family: Calappidae Milne-Edwards, 1837 other species, might be a reflection of the species’ highly Genus Calappa Weber, 1795 carnivorous, predatory nature. The beach from which Calappa bilineata Ng, Lai & Aungtonya, 2002 (Image 1) specimens were collected represents sandy flats at low Common name: Two-striped Box Crab tide, devoid of limestone rock compared to the other parts Material examined: 07.xii.2012, two individuals of the island. The adjoining shallow sea-shelf, however, (male), Saint Martin’s Island, Bangladesh, 20038′07.50”N has submerged coral associations and dead coral colonies & 92019′34.68″E, coll. M. Akash. (Tomascik 1997). Formation of such sandy inter-tidal layers 9772 Journal of Threatened Taxa | www.threatenedtaxa.org | 26 January 2017 | 9(1): 9771–9773 Record of Calappa bilineata from St. Martin’s Island, Bangladesh Akash & Hossain et al. © Muntasir Akash Calcutta, 565pp. Galil, B. & P.K. Ng (2010). On a collection of calappoid and leucosioid crabs (Decapoda, Brachyura) from Vanuatu, with description of a new species of Leucosiidae, pp. 139–152. In: Castro, P., P.J.F. Davie, P.K.L. Ng & B. Richer de Forges (eds.). Studies on Brachyura: A Homage to Danièle Guinot. Crustaceana Monographs Vo. 11, Leiden, 376pp. http://doi. org/10.1163/ej.9789004170865.i-366.87 Galil, B.S. (1997). Crustacea Decapoda: A revision of the Indo-Pacific species of the genus Calappa Weber, 1795 (Calappidae). Mémoires du Muséum national d’Histoire naturelle 176: 271–335. Grave, S. De, N.D. Pentcheff & T. Ahyong (2009). A classification of living and fossil genera of decapod crustaceans. Raffles Bulletin of Zoology 21(sSupplement): 1–109. Holthuis,
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