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Indonesian Giuris species are reviewed and compared to the known species described from the area. Three species are recognized including one new species, which is described in this paper using genetic and morphomeristic approaches. The three species differ by a high percentage of divergence in partial COI gene (652 bp) and by several characters including the number of pectoral fin rays, the scales in transverse forward series, the scales around the eye and the interorbital length. [ABSTRACT FROM AUTHOR]

A new species of Belobranchus, a freshwater Eleotridae, is described from streams of Indonesia. It differs from the other only species belonging to the genus by a combination of characters including the scales in transverse forward series (22-28 versus 27-35), in transverse back series (18-21 versus 20-23), in predorsal scales (16-23 versus 21-34), and the in vivo general colour pattern. Particularly the caudal fin is never spotted but generally translucent with some yellow or reddish zones. [ABSTRACT FROM AUTHOR]

Background : The freshwater ichthyofauna of Wallacea is diverse and understudied. A baseline survey of Bolano Sau Lake in Parigi Moutong District, Central Sulawesi Province, Indonesia in 2019 found an eleotrid goby (local name payangka) with characters conforming to the genus Giuris , long considered monophyletic as G. margaritacea/G. margaritaceus but recently found to comprise at least eight species. This study focused on the molecular (DNA barcoding) identification and phenotypic characters of the payangka. Methods : Payangka samples were collected from August to December 2019 in collaboration with local fishermen, weighed and measured, and preserved in 75% ethanol. Length, weight, sex (n=111) and 17 morphometric characters/six meristic counts (n=42) were recorded. DNA barcoding was performed on a fin clipping preserved in 96% ethanol. Homologous nucleotide sequences were obtained from public (GenBank and BOLD) databases, analysis conducted in MEGA X, and phylogenetic trees edited in the Interactive Tree of Life (iToL). Results : Within the deeply divided Giuris clade, the payangka sequence resolved into a sub-clade identified as Giuris laglaizei (Sauvage 1880), a recently resurrected taxon, based on a sequence provided by Philippe Keith. The length-weight relationship (L = 0.0087∙W3.162) indicated mildly allometric positive growth. Size distribution differed significantly between male and female fish with significantly larger mean size of males (13.56 cm) than females (11.62 cm). The meristic formula was: D VI-I,8 A I,8 P 13 V I,5 C15. Phylogenetic analysis indicated four Giuris species in wetlands around Tomini Bay and five in Sulawesi. Conclusions : This first record of G. laglaizei in Indonesia advances knowledge of Wallacean and Indo-Pacific Gobiiformes biogeography and highlights the need for a revision of the conservation status of the taxa currently grouped under Giuris margaritacea/G. margaritaceus in the IUCN Red List and FishBase databases. The data will inform biodiversity and fisheries management at local and regional levels., Competing Interests: No competing interests were disclosed., (Copyright: © 2023 Ndobe S et al.)