Results for “congener”

At the type locality of the congener S. lixianjiangensis sympatric species included Balitora kwangsiensis, Glyptothorax quadriocellatus, Garra orientalis, Hemibagrus pluriradtus, Poropuntius huangchieni, Pseudecheneis paviei,...

The genus Sphaerichthys currently comprises four species with S. osphromenoides by far the best known in the hobby. It's easily distinguishable from the congeners S. vaillanti and S. acrostoma since both exhibit a notably more elongate head and body profile, reverse sexual dimorphism (i.e. females are the more colourful/strongly-patterened), and are paternal mouthbrooders.

This species was referred to as S. sp. 'orange fin' or S. sp. 'ST01' prior to being offically named and is one of the more commonly-traded members of the genus, though often in batches containing only one gender, a mixture of species, or misidentified under an incorrect name such as S. zebrinus. It can be told apart from congeners by the following combination of characters: usually 9 soft second dorsal-fin rays; 15 soft pectoral-fin rays; first dorsal-fin in male poin...

This species seems not to have appeared in the trade and is similar to several congeners in appearance, most notably S. weberi which is native to the Maluku archipelago and other islands around the coast of Papua (formerly Irian Jaya). The two are said to be most easily-distinguished by examination of the belly which is fully-scaled in S. pelewensis but lacks scalation in S. weberi. The Gobiidae is the most speciose vertebrate family and notoriously problematic in terms of identifying fishes down to sp...

This fish was first collected in 2009 and limited numbers have been available in the aquarium trade. Though additional exports may be unlikely it's proven easy to breed in captivity and there's a fair chance it will become established in the hobby. It's sold under several names including T. sp. 'lemon' or 'yellow white cloud', and has also been misidentified as the congener T. thacbaensis, a valid species occurring much further north in Vietnam.

There are only three species in the genus Thayeria, of which T. boehlkei is by far the most popular in the hobby. Of its congeners, it was the type species T. obliqua that was originally given the common name of "penguin" fish or tetra, although T. boehlkei is usually sold under the same name (we've also seen it on sale as "hockeystick" tetra). The two are easy to tell apart, as in T. boehlkei the thick black stripe extending from the lower lobe of the travels laterally ...

There are only three species in the genus Thayeria, of which T. ifati is the least often seen in the hobby. This is a shame as it's a very pretty little fish. The holotype was collected from the upper Rio Maroni, close to the settlement of Gaa Kabaon on the French Guiana/Suriname border by the famous ichthyologist Jacques Géry in 1957. Géry also described the species in 1959. Of its congeners, it was the type species T. obliqua that was originally given the common name of &quo...

T. stellatus is superficially similar to its only congener T. securis, but can immediately be identified by the presence (vs. absence) of a prominent dark spot in the dorsal-fin. It is sometimes traded as 'platinum hatchetfish'. The genus Thoracocharax was originally erected by Fowler in 1906 as a subgenus of Gasteropelecus, but was elevated to generic status by Weitzman (1960).

Very similar to its congener T. exilis, it can be distinguished by looking at the position of the eye which is set much further forward in exilis. Also, the humeral process (long spine extending from the back of the gill plate), is broader and shorter in this species than exilis. Neither are seen very often in the hobby....

Very similar to its congener T. decaradiatus, it can be distinguished by looking at the position of the eye, which is set much further back in decaradiatus. Also, the humeral process (long spine extending from the back of the gill plate), is longer and thinner in this species than decaradiatus. Neither are seen very often in the hobby, but are sometimes available at specialist outlets....

It can be distinguished from congeners by its small adult size and presence of a single solid dark midlateral stripe on the body, above which is a series of dark blotches forming a second stripe. In the similar but larger, T. schalleri the upper stripe is more variable depending on the mood of the fish, sometimes fading entirely.

This species occurs in several colour forms depending on collection locality with some exhibiting more intense pigmentation in the fins or an additional reddish lateral stripe, for example. It's sometimes said to closely resemble and occur sympatrically with Rasbora agilis, but that name is currently considered a junior synonym of the congener Trigonopoma pauciperforatum. R. agilis had previously been us...