Results for “humeral spot”

Within this assemblage P. manipurensis is most similar to 'P.' meingangbii and P. padamya by virtue of the fact that males in all three possess orange-red pigmentation on the flanks and caudal-fin. It can be told apart most easily by the fact it possesses a relatively small, spot-like humeral marking, vs. a vertically-elongated, relatively large humeral marking in both the other species.

This species is relatively rare in the aquarium hobby but is occasionally traded as 'red-tailed flag tetra'. It lends its name to the H. aghula group of closely-related species within the genus as proposed by Géry (1977, see below) of which members share the following characters which set them apart from other characids: lower half of the body dark, especially above the anal-fin; usually possessing a laterally-elongate humeral spot, more-or-less united wit...

Hyphessobrycon melanostichos shares a number of similarities with Hyphessobrycon sp. Blue Ribbon. The former can be differentiated from the latter by a lighter set, more streamlined body , smaller humeral spot and also red colouring, which is not present on the Blue Ribbon tetra. Care and maintenance of the two species is however, virtually the same.

This is the smallest of three similar-looking species most commonly-referred to as the 'bleeding heart' subgroup, the other two being H. erythrostigma and H. socolofi. All possess a reddish humeral spot which is not present in any other characid with other shared characters including possession of 6 -14 maxillary teeth, 7-9 scales above the lateral line, 5-7 scales below the lateral line and 26-33 anal fin rays.

This small species is a popular aquarium fish but there is some confusion surrounding its identity. Two colour forms have been traded, one of which also possesses tiny hooks on the fin rays. It can be distinguished from congeners by colour pattern; the body is rose-coloured, fins red with no black markings, and the ovoid humeral spot is prominent, measuring around half of the body depth.

This species is uncommon in the aquarium trade although its name is sometimes applied to other species. It was originally described in the monotypic genus Pseudopristella, and can be distinguished from the vaguely similar Pristella maxillaris by possession of a relatively large (vs. relatively small) humeral spot and having black pigmentation in the anal-fin restricted to the first ray (vs. a prominent distal blotch).

This species has been traded as 'six-eyed tetra' in reference to its colour pattern comprising two dark spots on each flank plus the eye. Based on the extensive review of the genus by Lucena and Malabarba (2010), in which nine new species were described, P. tegatus can be told apart from congeners by the following combination of characters: lateral line incomplete with 8-13 perforated scales; laterally elongate humera...

There are currently 24 described species of Serrasalmus, many of which look superficially similar. S. marginatus has at various times been considered a synonym of S. rhombeus and S. humeralis, but is currently considered to be distinct. It's main distinguishing feature is usually given as the thick, black, v-shaped marking in the anterior portion of the caudal fin. Juveniles are said to differ from similar-looking species such as S. compressus and S. altuvei because the dark body "spot...

This is one of the species of Synodontis seen less frequently in the trade and it ranks alongside S. schall as one of the more aggressive members of the genus. It is very hardy however and makes a good tankmate for large aggressive cichlid species. One unique characteristic of S. acanthomias is that the humeral process (the bony extension just above the pectoral fins) is long and tapered with a curved end....