Taxonomy & naming
Schistura greenei was formally described by Sonja Endruweit in 2017 in Zootaxa, in a paper covering new Schistura species from the Salween basin of western Yunnan. The type locality is the Nanbanhe River, a tributary of the Nangunhe River within the Salween (Nu Jiang) drainage, at an elevation of roughly 1,184 ft. The species epithet honours Richard Greene of the Smithsonian Institution, credited in the original description for his persistent support of the author's fieldwork.
Schistura is by far the largest genus in Nemacheilidae, with well over 200 described species spread across South, Southeast and East Asia, and it continues to be split and revised as new material is examined — many species formerly lumped into Nemacheilus or Noemacheilus have since been moved into Schistura. Schistura greenei has not been placed in any subgenus or species group in the literature reviewed here, and no synonyms or prior combinations are on record; it has carried this name since its description.
Morphology
Schistura greenei is a small loach, reaching only about 2 in in standard length, consistent with the genus as a whole, whose members generally range from about 0.5–4.5 in SL. As in other Schistura, the body is slender and elongate, the skin is effectively naked to the eye with tiny, deeply embedded scales, and there is an erectile spine hidden in a groove below the eye — the suborbital spine shared across the true loaches, used defensively and as a hazard when handling the fish with a net.
Beyond these genus-level features, no detailed description of colour pattern, fin formula or other diagnostic morphology was available in the sources consulted for this profile. As a recently described, single-locality species, much of its fine anatomy is documented only in the technical taxonomic literature rather than in secondary sources — a case where it is more honest to note the gap than to guess at pattern details.
Habitat
The species is known only from its type locality: the Nanbanhe River, a small tributary of the Nangunhe River in the Salween River drainage, in Yunnan Province, western China. At the collection site the stream was about 26 ft wide and roughly 3 ft deep, at an elevation of 1,184 ft, with slightly turbid, brownish-tinged water measuring pH 6.2 and a conductivity of 100 µS/cm. The substrate was a mix of sand, pebbles, twigs, rocks and boulders, with a growth of short green algae over the stones.
This is a high-altitude Salween-basin stream, and the setting — fast current, rocky and gravelly bottom, cool elevation — points to clear, well-oxygenated flowing water typical of benthic micro-predator habitat in the region. No specific water temperature was recorded in the original description, but a 1,184 ft elevation stream in this part of Yunnan is reasonably expected to run cool rather than warm year-round; that inference is noted here rather than presented as a measured fact.
Feeding
No diet information specific to Schistura greenei has been documented. Across the genus, Schistura species are benthic micro-predators, foraging over gravel and stone substrates for small invertebrates — insect larvae, small crustaceans and other invertebrate prey picked from between stones in fast-flowing water.
In the aquarium, related Schistura species readily accept small live and frozen foods such as daphnia, cyclops and bloodworm, along with sinking pellets, but they can be slow to recognise or take flake food that sits at the surface. A keeper working with this species should plan around that pattern and offer sinking, meaty foods rather than assume a fish this size will graze algae or accept dry flake alone.
Mating
No courtship or spawning behaviour has been documented for Schistura greenei, and no external sexual dimorphism has been recorded either. Data on reproduction in this species is essentially absent from the literature — unsurprising for a fish described less than a decade ago from a single remote stream and never established in the aquarium hobby.
What can be said follows from the genus and family: Schistura and other Nemacheilidae are egg-scattering fish, without courtship displays or pair bonds of the kind seen in cave-spawning or mouthbrooding fishes. Any specifics of pairing or spawning triggers for this species would be speculation rather than fact, so none are offered here.
Breeding
As with the great majority of stone and brook loaches, Schistura greenei is not known to have been bred in captivity, and no aquarium spawning reports exist for it. The genus reproduces by scattering eggs over gravel and among stones in fast-flowing water, with no parental care of eggs or fry — a pattern shared broadly across Nemacheilidae.
Breeding Schistura species in general is considered difficult, typically requiring cool temperatures and strong water flow to bring fish into condition, and even then successful spawnings are seldom reported. For this specific, recently described, single-locality species, the honest summary is that its captive breeding biology is undocumented; anyone attempting it would be working without a template from either the scientific or hobbyist literature.
In the aquarium
Schistura greenei is not established in the aquarium trade, and no husbandry reports for the species were found. Given its small size (around 2 in), its natural cool, fast-flowing, well-oxygenated stream habitat, and general Schistura care needs, a hypothetical setup would call for a tank with strong current, high dissolved oxygen, a gravel-and-stone substrate, and cooler water than typical tropical community fish — closer to the temperate-to-subtropical end of the range rather than a warm, still tank.
As a near-scaleless loach it should be assumed sensitive to copper-based medications and full-strength treatments, in keeping with the rest of the family, so any medicating would call for caution and reduced dosing. Because so little is documented, this species is best treated as a case study in the limits of what is known about Asia's stream loaches rather than as a species with an established care routine — data sparse is the accurate description, not a gap to paper over with guesswork.
Conservation
Schistura greenei has not been assessed by the IUCN Red List and carries no conservation category here; it is recorded as Not Evaluated rather than assigned a guessed status. It is known only from its type locality in the Nanbanhe River, a tributary of the Nangunhe River in the Salween drainage of western Yunnan, China — a single-stream range that would, if formally assessed, likely warrant close scrutiny given how little redundancy such a narrow distribution allows.
No information on population trend, harvesting or trade was located for this species; there is no evidence it is collected for the aquarium trade at any scale. As with many recently described, narrow-range stream loaches in this part of Asia, the main plausible long-term pressures would be habitat-linked — changes in water quality, flow or land use in its home watershed — rather than any documented commercial exploitation.