A new species of Osteobrama (Teleostei: Cyprinidae) from the Mahanadi River, India with a note on the validity of O. dayi

Abstract

A new species of the genus Osteobrama is described from the Mahanadi River, Tikarpada, Angul District, Odisha state, India. Osteobrama tikarpadaensis, new species, differs from its congeners in having two pairs of minute barbels; iii–iv unbranched dorsal-fin rays with 25–33 serrae on the last unbranched ray; 15–16 branched pectoral-fin rays, and 25–27 branched anal-fin rays. The status of Osteobrama dayi is discussed and shown to be a valid species. A key to the species of the genus is provided.

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“…After detail examination, Shangningam et al (2020) followed Hora & Misra (1940) [5] 16-18), more pre-dorsal scales (31-32 vs. 19-22), lesser predorsal distance (53.7-54.0 % SL vs. 53.0-56.5), a smaller eye diameter (vs. 6.1-6.9 % SL vs. 8.7-11.6) and a greater interorbital distance (7.6-8.0 % SL vs. 5.9-7.3). The present study fully agrees with the description of Osteobrama tikarpadaensis Shangningam et al (2020) [7] . However, there are slight variations in the body morphometry, which is presented in Table 1.…”

“…The genus is characteristic in having a deep and strongly compressed body, with the abdominal edge trenchant in its entirety or from the pelvic-fin base to vent; 0-2 pairs of barbels; a complete lateral line running medially; and 11-33 branched rays in the anal fin (Talwar & Jhingran 1991) [10] . Shangningam et al (2020) [7] described Osteobrama tikarpadensis from the Mahanadi River, Tikarpada, Angul District, Odisha and recognized other nine valid species within the genus viz., O. belangeri (Valenciennes 1844) [11] ; O. feae Vinciguerra (1890) [12] and O. cunma (Day 1888) [2] from the Chindwin-Irrawaddy drainage of India and Myanmar; O. cotio (Hamilton 1822) [4] from the Barak-Meghna and Ganga-Brahmaputra drainages of India and Bangladesh; O. neilli (Day 1873) [1] from the Cauvery drainage of India; O. bakeri (Day 1873) [1] from westflowing rivers in Kerala and O. vigorsii (Sykes 1839) [8] ; O. dayi (Hora & Misra, 1940) [5] and O. peninsularis Silas (1952) [8] from the Godavari and Krishna drainages of India. A fish collection lot from the Erai River, Chandrapur District, Maharashtra India included two specimens of Osteobrama.…”

Integrative Taxonomy Clarifies the Historical Flaws in the Systematics and Distributions of Two Osteobrama Fishes (Cypriniformes: Cyprinidae) in India

“…cunma (Day, 1888), O. belangeri (Valenciennes, 1844), and O. feae Vinciguerra, 1890-are distributed in Southeast Asia, Myanmar, and China [17,19,20]. A recent addition to the genus is O. tikarpadaensis (Shangningam, Rath, Tudu and Kosygin, 2020), described from the Mahanadi River in Odisha, central India, and reported in the Erai River, Godavari drainages, Maharashtra [21,22]. Although O. alfredianus (Valenciennes, 1844) was originally documented in Mysore, peninsular India [18], subsequent taxonomic assessments have synonymized it with O. vigorsii [17].…”

“…In the realm of systematics, the presence or absence of barbels stands as a crucial taxonomic trait in Osteobrama [21,23]. When present, these barbels may manifest as a single pair of maxillary barbels or include both maxillary and rostral varieties, sometimes being minute or rudimentary in certain species.…”

“…When present, these barbels may manifest as a single pair of maxillary barbels or include both maxillary and rostral varieties, sometimes being minute or rudimentary in certain species. Rostral barbels may either remain concealed in a groove or be visible only under microscopic examination, while in other species, they can be significantly longer, extending to the base of maxillary barbels [17,19,21]. The type locality of O. vigorsii is the Bhima River (a tributary of the Krishna River) at Pairgaon, Maharashtra, but there are also reports in the Krishna and Godavari Rivers [24,25].…”