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Down Cat-eLog Data Sheet
Scientific Name Chaetostoma formosae  Ballen, 2011
Common Names L187B, Blonde Rubbernose Pleco
L444, Blonde Bulldog Pleco, Blonde Rubber Pleco, Smuk Gumminæse (Denmark), Smuk Gumminæse-sugemalle (Denmark), Striped Bulldog Pleco, Striped Rubber Pleco, Striped Rubbernose Pleco
Type Locality Caño Chuy, affluent of río Upía, Boyacá -- Casanare border, upper río Meta basin, Orinoco drainage, San Luis de Gaceno, Departamento de Boyacá, Colombia.
Pronunciation KATE oh STOW mah
Etymology Greek, chaite = hair + Greek, stoma = mouth. This species is named formosae, an adjective in genitive case derived from the latin formosa. The name honours Ballen's sister, Laura María Ballen, in recognition of her unconditional love and support to him.
Article Link - Shane's World Right Reproduction Right A Chance Spawning of Chaetostoma sp. (L444)
Article Link - CotM Right 2012 Right February
Down Species Information
Size 103mm or 4.1" SL. Find near, nearer or same sized spp.
Identification The genus Chaetostoma is not straightforward to identify, but as a general rule, the species has spines behind the gill-cover (interopercular odontodes), no plates on the abdomen, and aside from C. platyrhynchus also lack plates on the snout edge. Different from Ancistrus by not having fleshy tentacles on the snout.

This particular species has spots only on the head. All fins are clear and each body armour plate is lined in black. The basic colouration is pale olive green. Aqualog shows this fish as L146/L146a and L187b. The real L146 (introduced in DATZ) is a rather unusually shaped but plainly coloured ancistrine loricariid also from Colombia. L187b is an Aqualog invention and only used here for reference/link back to the old Aqualog literature.
Variously and incorrectly labelled as C. thomsoni and others.
Some sources consider L444 the same as C. tachiraense. This may stem from a confusion about the Rio Tachira in the Rio Meta drainage, and the namesake river in the Maracaibo basin.
Sexing The males have however a somewhat larger and broader head, slimmer ventral sides and disproportionately large pelvic fins. Perhaps the over-sized pelvic fins play a large role in the fertilization of the eggs. By inverting these over the clutch of eggs, they prevent the sperm cells being carried away too fast in the current.
Down Habitat Information
Distribution Currently known from western piedmont tributaries of the upper río Meta and Guaviare basins, in departments of Meta and Casanare, Eastern Colombia, Orinoco drainage.
Orinoco, Middle Orinoco, Meta, Upper Meta, Upía (click on these areas to find other species found there)
Orinoco, Upper Orinoco, Guaviare, Upper Guaviare, Ariari, Güejar (click on these areas to find other species found there)
Orinoco, Middle Orinoco, Meta, Upper Meta, Cusiana (click on these areas to find other species found there)

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IUCN Red List Category Vulnerable, range map and more is available on the IUCN species page. Last assessed 2020.
pH 6.8 - 7.8
Temperature 20.0-25.0°C or 68-77°F (Show species within this range)
Other Parameters Has more stringent demands on water quality than many plecos and requires highly oxygenated water when kept in warmer water. Medium hard water is also beneficial.
Down Husbandry Information
Feeding Omnivore. Will eat algae and small live or frozen food. Some individuals can be weaned onto pellet food although this usually takes some effort and trial and error on the part of the aquarist. User data.
Furniture Worn smooth rounded or slightly flat fist sized rocks on a fine sand substrate.
Compatibility A peaceful fish which can sometimes be a little territorial with its own species.
Breeding See Shane's World Article
Breeding Reports There are 2 breeding reports, read them all here.
Down Further Information
Reference Papéis Avulsos de Zoologia, Museu de Zoologia da Universidade de São Paulo v. 51 (no. 26), pp 384, Figs. 1 and 3.
Registered Keepers There are 144 registered keepers, view all "my cats" data.
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There are 2 wishes to keep this species, see who wants what.
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There are 38 records of this fish being seen, view them all.
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Last Update 2022 Jan 22 09:50 (species record created: 2001 May 05 00:00)