Hoplisoma armatum (formerly Corydoras armatus) is one of the longest-known species of armored catfish. It was scientifically described in 1868 as the sixth species in what was then the genus Corydoras. Surprisingly, however, the species did not appear in the aquarium hobby until much later—probably not until the 1990s—and has remained relatively rare in the hobby to this day. The species name “armatum” means “armed” and refers to the extremely long dorsal fin spine. This makes the species, which was scientifically described as originating from Peru (Rio Huallaga), virtually unmistakable. There are, however, two look-alikes. The first comes from Brazil (Rio Abuna, on the border between Brazil and Bolivia). The Brazilian species was given the invalid trade names “Corydoras dorsalis” and “Corydoras ogawae,” which are made-up names with no scientific significance. Additionally, this form was assigned the number CW86.
The second look-alike also comes from Peru (Rio Nanay) and was assigned the C number 96. While the Brazilian lookalike is virtually indistinguishable from the “real” Hoplisoma armatum (aside from the 2,500 km as the crow flies between the Rio Huallaga and the Rio Abuna and the slightly coarser spots on CW 86), C96 has a black, vertical stripe beneath the dorsal fin on its shoulder, which makes it easily recognizable. In addition, C96—which has not yet been scientifically described—develops a slight ochre tint on its anterior body. Hoplisoma sp. C96 is an uncomplicated, attractive armored catfish that can be kept without difficulty in any well-maintained community aquarium, where it adds life to the bottom area.
Maximum size: approx. 4.5–5 cm; Temperature: 22–28°C; pH and hardness: not important for care (tap water), soft and acidic for breeding; Diet: omnivorous; Social behavior: peaceful schooling fish.
For our customers: These fish are listed under codes 222202 through 222205 on our inventory list. Please note that we supply exclusively to wholesale customers.
Text & photos: Frank Schäfer
