Fig 1 - uploaded by Maurice Kottelat
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Mouth parts in Lepidocephalichthys berdmorei (CMK 25927, 71.1 mm SL), as example for the genus; ventral view. Abbreviations: mb, maxillary barbel; ml, mental lobe of lower lip; pf, posterior flange of lower lip; rbi, inner rostral barbel; rbo, outer rostral barbel; ul, upper lip.
Contexts in source publication
Context 1
... (1990) and Kottelat & Freyhof (2007). Head length is the lateral head length of Kottelat (1990). Last 2 branched dorsal and anal-fin rays articulating on a single pterygiophore are noted as "1½". The last two posterior rays (6 and 7th branched rays) of the pectoral fin, when fused, are called pectoral rod. Terminology for mouth parts, see Fig. 1; the lower lip is interrupted in the middle; each half is made of a fleshy lobe in medial position (mental lobe), which ends in a point, may have a number of indentations on the medial side, and is separated from the lateral portion by a small notch; the lateral portion (postlabial flange) is the area between the mental lobe and the ...
Context 2
... indentations on the medial side, and is separated from the lateral portion by a small notch; the lateral portion (postlabial flange) is the area between the mental lobe and the base of the maxillary barbel; the postlabial flange is thin, extends backwards, its posterior part is free from the throat and its posterior edge usually lobed or fringed (Fig. 1). Abbreviations used: CMK, collection of the author; MHNG, Muséum d'Histoire Naturelle, Genève; and ZRC, Lee Kong Chian Natural History Museum, ...
Context 3
... et al., 2014). Other characters are: slender body; absence of lateral line; dorsal fin with 3-4 unbranched and 6½ branched rays; pelvic fin with 1 unbranched and 6 branched rays; anal fin with 3 unbranched and 5½ branched rays; caudal fin with 14 branched rays; three pairs of barbels (2 rostral and 1 maxillary); each half of lower lip ( Fig. 1) with a pointed mental lobe separated from postlabial flange by a small notch, posterior margin of flange and medial edge of lobe denticulated, crenulated or fringed; anterior naris at tip of a short tube (not extended into a 'nasal ...
Context 4
... and later as lamina circularis, which is more appropriate because the structure is not a scale. The lamina circularis is a laminar, usually but not always circular, posterior projection of the first (proximal-most) segment of the dorsal hemitrich of the first branched pectoral-fin ray (see, e.g., Nalbant, 1963: 356;Kottelat & Freyhof, 2007: 301, fig. 61). A second lamina circularis is present on the second branched ray in some species. Obviously, the lamina circularis of males of Cobitis and Misgurnus is not homologous with the fused pectoral-fin rays 7-8 of male Lepidocephalichthys, with the thickened pectoral-fin rays 1-2 of male Theriodes, with the curled pectoral fins with ...
Citations
... The loach genus Lepidocephalichthys comprises of about 19 valid species with a range extending across the lowlands of Sri Lanka and India, across Myanmar to the Mekong basin, Thailand, and the Sundaland (Havird & Page, 2010;Kottelat, 2012;Fricke et al., 2023). Fishes of this genus are distinguished from other cobitids by males having the seventh and eighth pectoral-fin rays fused and hardened into a 'lamina circularis' (except in L. eleios: Havird & Page, 2010;Kottelat, 2017). Four species from the peninsula of India and Sri Lanka are considered valid in the current literature: L. thermalis (Valenciennes), shared between Sri Lanka and India; L. coromandelensis (Menon), from the Araku Valley of the Eastern Ghats of Andhra Pradesh in the eastern peninsula; L. guntea (Hamilton) from the northern Western Ghats and Godavari River (Keskar et al., 2018); and L. jonklaasi (Deraniyagala), from the rainforests of perhumid south-western Sri Lanka (Pethiyagoda, 1991). ...
Loaches of the genus Lepidocephalich-thys are ubiquitous in Peninsular India and the nearby continental-shelf island of Sri Lanka. Four valid species are reported from this region: L. thermalis, a species reported from across this region; L. jonk-laasi, confined to rainforests in southern Sri Lanka; L. coromandelensis, from the Eastern Ghats and L. guntea, from the northern Western Ghats of the Indian peninsula. Here, based on collections from 25 locations in 13 river basins in Sri Lanka and 20 locations across India, including a dataset downloaded from GenBank, we present a molecular phylogeny constructed from the mitochondrial cytochrome b (cytb) and cytochrome c oxidase subunit 1 (cox1) sequences. We show that ancestral Lepidocephalich-thys colonized Sri Lanka in the late Miocene. Multiple back-migrations to India, as well as colonizations from the mainland, took place in the Plio-Pleisto-cene. The persistence on the island of L. jonklaasi, an obligatory rainforest associate, suggests that per-humid refugia existed in Sri Lanka throughout this Handling editor: Louise Chavarie Supplementary Information The online version contains supplementary material available at https:// doi. time. Lepidocephalichthys thermalis appears to have colonized the Sri Lankan highlands as recently as the Pleistocene. The data suggest that Lepidocephalich-thys thermalis is a species complex in which multiple species remain to be investigated and described, both in India and Sri Lanka.
... The eastern and western borders of the IWS are flanked by mountain ranges that reach over 1400 m in elevation and bear mixed deciduous and riverine evergreen forests at their lower to mid-level elevations and hill pine forests in their uplands. The watersheds draining these ranges contain endemic fish (Kottelat 2017) and invertebrates (Dumont & Green 2005) and the lake and its surrounding wetlands support a diversity of globally threatened wildlife including fishes, endangered birds, an endemic turtle, and an endemic salamander (Fritz, et al. 2008;Hla et al. 2010;Lwin et al. 2016;Than et al. 2019). Although much attention has been paid to the wetland areas surrounding the lake, relatively little work has been done in the surrounding riverine watershed habitats. ...
A herpetological survey of the Indawgyi Wildlife Sanctuary in Kachin State, Myanmar resulted in the discovery of a new species of Cyrtodactylus Gray along the eastern watershed of the Mokso Mountains. An integrative taxonomic analysis based on the mitochondrial ND2 gene, morphology, and color pattern recovered this new species, Cyrtodactylus mombergi sp. nov., as the sister taxon to an undescribed species from Miao, Arunachal Pradesh, India. Bayesian and maximum likelihood analyses recovered notable genetically divergent (4.7%) phylogeographic structure between northern and southern populations of C. mombergi sp. nov. across only 14 km of continuous habitat. Conversely, genetic divergence did not exceed 9.2% between C. mombergi sp. nov. and the undescribed species from Miao from across 355 km of habitat. Cyrtodactylus mombergi sp. nov. belongs to a well-supported, mitochondrial clade of 18 other species which now compose an expanded and redefined C. gansi group. Cyrtodactylus mombergi sp. nov. is only the third species of Bent-toed Gecko reported from Kachin State and indicates that additional herpetological surveys are needed in unexplored forested areas.
Lepidocephalichthys balios, new species, is described from the Nam Mang watershed, a tributary of the
Mekong, in central Laos. It is a small-sized species (largest known specimen 32.6 mm SL) distinguished from all
congeners (except L. eleios) in having the last two rays of the pectoral fin in the male adjacent, without membrane
between them but not fused, and without dorsal flange or projections (vs. unbranched parts fused and forming a
thick rigid rod, with a dorsal projection). The body is entirely covered by isolated randomly distributed pigments,
at places concentred in a midlateral row of 5–10 weakly contrasted irregular blotches and 6–9 irregular saddles,
and the black basal caudal pattern made of two vertically elongated blotches. The species was collected in leaf
litter and in vegetation at the bottom of a pool in a slow flowing stream.
Opsarius putaoensis, new species, is described from the Mali Hka River, a tributary of the Irrawaddy River in northern Myanmar. For convenience of identification, Opsarius sensu Rainboth (1991) in Southeast Asia and India can be divided into two species groups based on the number of anal-fin rays: (1) the O. gatensis species group with more than 12 branched anal-fin rays, and (2) the O. barna species group with fewer than 11 branched anal-fin rays. The remaining species of the O. barna species group can be divided into two species subgroups by the presence or absence of barbels: (1) the O. chatricensis species subgroup without barbels, and (2) the O. barnoides species subgroup with one or two pairs of barbels. Opsarius putaoensis sp. nov. is a member of the O. chatricensis species subgroup together with O. chatricensis, O. arunachalensis, and O. barna. Opsarius putaoensis is most similar to O. chatricensis in overall appearance, including the number of vertical bars and color pattern, but it differs from O. chatricensis by the following characters: insertion of dorsal not reaching posterior end of pelvic fin base vs. reaching, vertical bars 6−7 vs. 7−8, vertical bars extending to the lateral line vs. not, branched anal-fin rays 9 vs. 10, branched pelvic-fin rays 7 vs. 8, branched pectoral-fin rays 12, rarely 11 vs. 11, circumpeduncular scales 12 vs. 14, and scale rows between dorsal-fin origin and lateral line 7−8 vs. 6. It is distinguished from all other species of the genus Opsarius by a combination of the following characters: barbels absent, dentary with parallel rows of tubercles, snout much shorter than eye diameter, mouth gape below anterior edge of orbit, body deep with depth 25.6−33.3% SL, pectoral and pelvic axial scales lobate, lateral line completely perforated with 35−38 scales, scale rows between dorsal-fin origin and lateral line 7−8, predorsal scales 15, circumpeduncular scales 12, branched dorsal-fin rays 7, branched anal-fin rays 9, branched pelvic-fin rays 7, insertion of dorsal not reaching pelvic-fin base, body with 6−7 vertical bars, extending to lateral line, and distal edge of dorsal fin black.
