Puntigrus anchisporus

Puntigrus: formed from part of the generic name Puntius and tigrus, a word created to sound like the Latin word tigris, meaning 'tiger', in allusion to the barred colour pattern and the common name 'tiger barb' used for some members.

anchisporus: Vaillant did not specify the precise derivation, but probably from the Ancient Greek ἄγχῐ (akchi), meaning 'near', and σπόρος (spóros), meaning 'offspring', in reference to this species' resemblance to certain other small cyprinids.

Endemic to Borneo, with Indonesian records from the Kapuas and Mempawah rivers in Kalimantan Barat (West Kalimantan) province, Maruwei, Pembuang, Teweh, and Kahayan watersheds in Kalimantan Tengah (Central Kalimantan), plus the Negara and Jorong drainages in Kalimantan Selatan (South Kalimantan).

It also occurs throughout much of Sarawak state in the Malaysian part of the island, although official records are lacking (M. Lo, pers. comm.; pers. obv.).

Type locality is 'Kapuas River, Borneo, Indonesia'.

Occurs in forest streams and tributaries containing relatively clear water and sandy to rocky substrates. Marginal vegetation tends to grow thickly and the water may be stained yellowish with tannins and other organic substances.

Beds of aquatic plants from genera such as Cryptocoryne or Barcalaya and patches of submerged leaf litter can be found in some habitats.

Sympatric species include members of Desmopuntius, Eirmotus, Rasbora, Gastromyzon, Nemacheilus, Pangio, and Paracrossocheilus.

An aquarium measuring at least 80 ∗ 30 ∗ 30 cm31 ∗ 12 ∗ 12 in is required.

Choice of décor is not especially critical though it should display better colouration in a well-decorated set-up. The addition of floating or overhanging vegetation and driftwood roots or branches also seems to be appreciated by members of this genus.

Probably an omnivore feeding primarily on insect larvae and zooplankton, but also known to browse plant material and organic detritus (pers. obv.).

In the aquarium offer regular meals of small live and frozen foods such as chironomid larvae (bloodworm), Daphnia, and Artemia alongside good quality dried products.

Limited aquarium observations suggest this species to be peaceful when provided with a sufficiently large aquarium and well-chosen tankmates.

It is a gregarious species forming loose hierarchies, with rival males continually battling with each other for female attention and hierarchical position within the group. A group of at least 8-10 specimens should therefore be considered the minimum purchase.

Adult males tend to be slightly smaller, slimmer, and possess a more intense colour pattern than females.

Unrecorded.

This species occasionally appears in the aquarium hobby, but the trade is largely reliant on commercially-produced 'tiger barbs' of questionable origin.

It is distinguished from congeners by the following combination of characters: lateral line complete; 14 circumpeduncular scales; 21-23+2 scales in the lateral row; dorsal-fin black with red outer band; pelvic fins red.

The genus Puntigrus was raised by Kottelat (2013) in order to accommodate a group of species formerly referred to as the 'Puntius tetrazona group'. Other members are P. tetrazona, P. navjotsodhii, P. pulcher, and P. partipentazona, of which the first three are native to western, central, and eastern Borneo, respectively, and the latter to Indochina.

This assemblage is diagnosed by possession of a unique colour pattern comprising 4 black bars on a pale body, and black pigmentation on at least the basal half of the dorsal-fin. The anteriormost body bar passes through the eye, the second is anterior to the pelvic-fin base, the third is above the anal-fin and continues onto it, and the posteriormost is at the caudal-fin base.

The following combination of characters also aid in identification, although individually they are not unique to the genus: body rhomboid, deep; last simple dorsal-fin ray serrated posteriorly; rostral barbels absent; maxillary barbels present; lips smooth and thin, postlabial groove interrupted medially; lateral line complete or incomplete; 18–23 lateral line scales; 9½–10½ [5½/1/3–4½] scale rows between dorsal-fin origin and ventral midline anterior to pelvic-fin base; 12–14 circumpeduncular scale rows; 8–9 rakers on first gill arch.

The genus Puntius was previously viewed as a polyphyletic catch-all containing over 100 species, but this situation has been largely resolved since the turn of the century.