Dicrossus maculatus

Dicrossus maculatus
Spade Tail Checkerboard Cichlid
A strikingly beautiful dwarf cichlid, but unfortunately very rarely seen in the hobby. Males can be distinguished by the more intense colouration. During spawning, the female's ventral fins turn bright yellow with a black border, possibly a better signal to the fry. In this species, the caudal fin is rounded, hence the common name "spadetail checkerboard" as opposed to the elongated lyretail of males in the sister species D. filamentosus. The species is not difficult to breed, provided strict attention is paid to the water parameters (mandatory) and live foods are offered. 
The aquarium should be well-planted, and the water must be soft and acidic as noted under the water parameters below. Other fish in the aquarium will make this very shy and otherwise retiring cichlid feel more at ease. Plenty of wood and branches will replicate their natural habitat and provide hiding spots to further the fish's sense of security.
The common name "checkerboard" which is applied to the species in Dicrossus and also to the two species in Crenicara comes from the pattern of black squares on the sides of the fish. The checkerboard cichlids are within the Crenicarine clade of the subfamily Geophaginae and contain the species in Crenicara [2 valid species, C. punctulatum and C. lamincularium], Dicrossus [currently 3 valid species, D. filamentosus, D. maculatus and D. gladicauda erected in 2008 by Schindler & Staeck, and possibly 2 undescribed species (Schindler & Staeck, 2008)] and Mazarunia. The latter genus was erected by Kullander in 1990 for the new single (and type) species M. mazarunii.

This species was described by F. Steindachner in 1875 and named Dicrossus maculatus. Regan (1905) regarded the genus Dicrossus as a synonym of Crenicara, a view held by others until Kullander in 1990 determined that Dicrossus and Crenicara are distinct enough to be treated as separate taxa and he re-validated Dicrossus for the two species D. filamentosus and D. maculatus. Work by Lopez-Fernandez et.al. in 2005 agrees, further showing the two genera as sister taxa sharing a serrated posterior margin of the preopercule, a conspicuous and relatively rare character state in SA cichlids according to Kullander (1990).
Dicrossus comes from the Greek di [two] and krossoi [aspergillum, an instrument such as a brush or a perforated container used for sprinkling holy water]. Crenicara comes from the Latin noun crena [notch] and the Tupi-Guarani native word acara [cichlid].

In 1936, E. Ahl described the species Crenicara praetoriusi, but this was determined by Kullander to be the same species and the name is now a synonym (invalid) for the subject species.

以身上黑色点纹的特征而得其命“棋盘”,外表上三个主要品种的棋盘短鲷都各有其明显特色,区分的时候还是相当容易的。棋盘短鲷不但色泽上艳丽夺目,其独特“突停”的泳姿更显其幽雅风格。 极其夺目的外表和出众的体型使皇冠棋盘荣登“短鲷之王”的美誉