Gurumon gurumayum, a new genus and new species of freshwater crab (Decapoda: Brachyura: Potamidae) from Arunachal Pradesh, northeastern India
Abstract
A new genus and new species of potamid crab, Gurumon gurumayum gen. et sp. nov., are described from the Arunachal Pradesh State of northeastern India. Gurumon gen. nov. has affinities with Abormon Mitra, Pati & Ng, 2021, Pararanguna Dai & Chen, 1985, and some species of Potamiscus Alcock, 1909, but the new genus can easily be differentiated from them mainly by its low external orbital angle, the relatively stouter exopod of the third maxilliped, and the relatively broader male pleonal somite 6. Their male first gonopods are also different from each other. Counting Gurumon gurumayum gen. et sp. nov., India is currently known for ten genera and 24 species of potamiscine freshwater crabs, and Arunachal Pradesh for eight genera and 11 species of these crabs. The current nomenclatural problems with Potamiscus are also discussed.
References
Alcock A. 1909. Diagnoses of new species and varieties of freshwater crabs. Nos. 1–3. Records of the Indian Museum 3 (3): 243–252.
Alcock A. 1910. Catalogue of the Indian Decapod Crustacea in the Collection of the Indian Museum. Part I. Brachyura. Fasciculus II. The Indian Fresh-water Crabs – Potamonidae. Indian Museum, Calcutta.
Bott R. 1970. Die Süßwasserkrabben von Europa, Asien, Australien und ihre Stammesgeschichte. Eine Revision der Potamoidea und Parathelphusoidea (Crustacea, Decapoda). Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft 526: 1–338.
Chu K., Zhou L. & Sun H. 2017. A new genus and new species of freshwater crab (Decapoda: Brachyura: Potamidae Ortmann, 1896) from Yunnan Province, China. Zootaxa 4286 (2): 241–253. https://doi.org/10.11646/zootaxa.4286.2.7
Coleman C.O. 2018. Shadings in digital taxonomic drawings. Zoosystematics and Evolution 94 (2): 529–533. https://doi.org/10.3897/zse.94.28624
Dai A.Y. 1999. Fauna Sinica: Arthropoda Crustacea Malacostraca Decapoda Parathelphusidae Potamidae. Science Press, Beijing. [In Chinese with English abstract.]
Dai A.Y., Chen G.X., Liu J.B., Luo X.R., Yi D.Y., Liu Z.H., Gu G.Q. & Liu C.H. 1990. A study on freshwater crabs of Sichuan Province. Acta Zootaxonomica Sinica 15 (3): 282–297. [In Chinese with English abstract.]
Davie P.J.F., Guinot D. & Ng P.K.L. 2015. Anatomy and functional morphology of Brachyura. In: Castro P., Davie P.J.F., Guinot D., Schram F.R. & von Vaupel Klein J.C. (eds) Treatise on Zoology – Anatomy, Taxonomy, Biology. The Crustacea. Volume 9 (Part C-I). Decapoda: Brachyura (Part 1): 11–163. Brill, Leiden. https://doi.org/10.1163/9789004190832_004
Guinot D., Tavares M. & Castro P. 2013. Significance of the sexual openings and supplementary structures on the phylogeny of brachyuran crabs (Crustacea, Decapoda, Brachyura), with new nomina for higher-ranked podotreme taxa. Zootaxa 3665 (1): 1–414. https://doi.org/10.11646/zootaxa.3665.1.1
ICZN (International Commission on Zoological Nomenclature) 1999. International Code of Zoological Nomenclature. Fourth edition. The International Trust for Zoological Nomenclature, Natural History Museum, London.
Mitra S. 2019. A new species of Himalayapotamon Pretzmann, 1966 (Decapoda: Brachyura: Potamidae: Potaminae) from Western Himalaya, India. Journal of Environment & Sociobiology 16 (2): 121–131.
Mitra S. 2020. Abortelphusa namdaphaensis, a new genus and new species of freshwater crab (Decapoda, Brachyura, Gecarcinucidae) from Arunachal Pradesh, India. Crustaceana 93 (7): 803–817. https://doi.org/10.1163/15685403-bja10027
Mitra S. & Pati S.K. 2021. A new species of freshwater crab, Teretamon kapota sp. nov. (Decapoda: Brachyura: Potamidae) and a new record from Arunachal Pradesh, North-Eastern India. Records of the Zoological Survey of India 121 (1): 1–9. https://doi.org/10.26515/rzsi/v121/i1/2021/153202
Mitra S. & Waikhom M.D. 2019. A new species of freshwater crab of the genus Potamiscus Alcock, 1909 (Crustacea: Brachyura: Potamidae: Potamiscinae) from Manipur, North-Eastern India. Journal of Emerging Technologies and Innovative Research 6 (1): 624–634.
Mitra S., Monica T. & Waikhom M.D. 2020. A new species of freshwater crab of the genus Badistemon Yeo & Ng, 2007 (Decapoda: Brachyura: Potamidae: Potamiscinae) from Manipur State, India, with the reassignment of Potamiscus pealianus (Wood-mason, 1871). Zootaxa 4838 (4): 475–490. https://doi.org/10.11646/zootaxa.4838.4.2
Mitra S., Pati S.K. & Ng P.K.L. 2021. Abormon, a new genus of freshwater crab (Crustacea: Brachyura: Potamidae) from northeastern India, with descriptions of two new species. Nauplius 29: e2021014. https://doi.org/10.1590/2358-2936e2021014
Mitra S., Payra A. & Chandra K. 2018. A new species of freshwater crab of the genus Teretamon Yeo & Ng, 2007 (Decapoda: Brachyura: Potamidae) from Arunachal Pradesh, northeastern India. Zootaxa 4500 (4): 587–595. https://doi.org/10.11646/zootaxa.4500.4.8
Montesanto G. 2015. A fast GNU method to draw accurate scientific illustrations for taxonomy. ZooKeys 515: 191–206. https://doi.org/10.3897/zookeys.515.9459
Montesanto G. 2016. Drawing setae: a GNU way for digital scientific illustrations. Nauplius 24: e2016017. https://doi.org/10.1590/2358-2936e2016017
Naruse T., Chia J.E. & Zhou X. 2018. Biodiversity surveys reveal eight new species of freshwater crabs (Decapoda: Brachyura: Potamidae) from Yunnan Province, China. PeerJ 6: e5497. https://doi.org/10.7717/peerj.5497
Ng P.K.L. 1988. The freshwater crabs of Peninsular Malaysia and Singapore. Department of Zoology, National University of Singapore, Shinglee Press, Singapore.
Ng P.K.L., Guinot D. & Davie P.J.F. 2008. Systema Brachyurorum: Part I. An annotated checklist of extant brachyuran crabs of the world. Raffles Bulletin of Zoology, Supplement 17: 1–286.
Ng P.K.L., Hla Htoo & Win Mar 2020. Potamiscus whitteni, a new freshwater crab from Chin State, Myanmar (Crustacea: Brachyura: Potamidae). Raffles Bulletin of Zoology, Supplement 35: 129–136.
Pati S.K. 2021. Two new species of freshwater crabs of the genus Potamiscus Alcock, 1909 (Brachyura: Potamidae) from Nagaland, northeastern India. Nauplius 29: e2021006. https://doi.org/10.1590/2358-2936e2021006
Pati S.K. & Thackeray T. 2018. The freshwater crab genera Ghatiana Pati & Sharma, Gubernatoriana Bott, and Inglethelphusa Bott (Crustacea: Decapoda: Brachyura: Gecarcinucidae) revisited, with descriptions of a new genus and eleven new species. Zootaxa 4440 (1): 1–73. https://doi.org/10.11646/zootaxa.4440.1.1
Pati S.K., Mitra S. & Yeo D.C.J. 2019. A new species of Acanthopotamon Kemp, 1918 (Decapoda: Brachyura: Potamidae: Potaminae) from northeastern India, with a key to the species of the genus and notes on their distribution in relation to freshwater ecoregions. Journal of Crustacean Biology 39 (4): 450–458. https://doi.org/10.1093/jcbiol/ruz040
Pati S.K., Yeo D.C.J. & Ng P.K.L. 2020a. Krishnamon, a new genus for the cavernicolous crab Telphusa austeniana Wood-Mason, 1871 (Decapoda: Brachyura: Potamidae) from Meghalaya state, northeastern India. Journal of Crustacean Biology 40 (3): 301–308. https://doi.org/10.1093/jcbiol/ruaa009
Pati S.K., Mitra S. & Ng P.K.L. 2020b. The identity of the freshwater crab Indochinamon manipurense (Alcock, 1909), with description of a new species of Potamiscus Alcock, 1909, from Manipur state, India (Decapoda, Brachyura, Potamidae). Crustaceana 93 (7): 703–725. https://doi.org/10.1163/15685403-bja10009
Pati S.K., Mandal S. & Jaiswal D. 2022. Description of a new species of Spiralothelphusa Bott, 1968, and redescription of Spiralothelphusa wuellerstorfi (Heller, 1862) (Decapoda: Brachyura: Gecarcinucidae). European Journal of Taxonomy 798: 1–29. https://doi.org/10.5852/ejt.2022.798.1629
Shih H.-T., Yeo D.C.J. & Ng P.K.L. 2009. The collision of the Indian plate with Asia: molecular evidence for its impact on the phylogeny of freshwater crabs (Brachyura: Potamidae). Journal of Biogeography 36 (4): 703–719. https://doi.org/10.1111/j.1365-2699.2008.02024.x
Wu H.-W. 1934. Enumeration of the river-crabs (Potamonidae) of China with descriptions of three new species. Sinensia 4 (11): 338–352.
Yeo D.C.J. & Ng P.K.L. 2004. Recognition of two subfamilies in the Potamidae Ortmann, 1896 (Brachyura, Potamidae) with a note on the genus Potamon Savigny, 1816. Crustaceana 76 (10): 1219–1235. https://doi.org/10.1163/156854003773123456
Yeo D.C.J. & Ng P.K.L. 2007. On the genus “Potamon” and allies in Indochina (Crustacea: Decapoda: Brachyura: Potamidae). Raffles Bulletin of Zoology, Supplement 16: 273–308.
Zhang Z., Xing Y., Cheng J., Pan D., Lv L., Cumberlidge N. & Sun H. 2020. Phylogenetic implications of mitogenome rearrangements in East Asian potamiscine freshwater crabs (Brachyura: Potamidae). Molecular Phylogenetics and Evolution 143: 106669. https://doi.org/10.1016/j.ympev.2019.106669
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