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Scientific Name Nannostomus digrammus  (Fowler, 1913)
Common Names Two Stripe Pencilfish
Ziersalmler (Germany)
Type Locality Rio Madeira about 200 miles east of 62°20'W, Brazil.
Type Locality Notes Fowler reported the type locality as "Madeira River, about 200 miles east of W. Long. 62°20', Brazil." But if you drop a pin on the middle Rio Madeira (near Ipixuna region), you'll see that the longitude is exactly 62°20' W. So how do you go 200 miles east of that and also be on the Madeira river? The only way is to move northeast along the Madeira to Nova Olinda do Norte. This does keep you on the Madeira and you are about 200 miles east of 62°20'W, but that is an awfully circular way to describe what could have been an easy place to characterize, especially given that the paratypes are collected in the vicinity of Porto Velho. For lack of additional information, the type locality is plotted as Rio Madeira near Nova Olinda do Norte (-3.802724, -59.048472).
Pronunciation nan oss tow muss. - dye gram uss.
Etymology Latin, nannus = small + Greek, stoma = mouth. 
Hop to next section Species Information
Size 28mm or 1.1" SL. Find near, nearer or same sized spp.
Sexing Females, when in good condition, have a fuller body. Males tend to have brighter colours, typically a lot more red in the colouration.
Hop to next section Habitat Information
Distribution South America: Rio Madeira, lower and middle Amazon and Guyana.
Amazon, Lower Amazon (click on these areas to find other species found there)
Amazon, Middle Amazon (Solimoes), Madeira (click on these areas to find other species found there)
Amazon, Middle Amazon (Solimoes) (click on these areas to find other species found there)
Guyana Waters (click on these areas to find other species found there)

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IUCN Red List Category Least Concern, range map and more is available on the IUCN species page. Last assessed 2020.
pH 5.0 - 6.8
Hop to next section Husbandry Information
Suggested Tankmates Avoid boisterous tankmates, this is a small slow moving species that shoals.
Breeding Reports There is no breeding report.
Hop to next section Further Information
Reference Proceedings of the Academy of Natural Sciences of Philadelphia v. 65, pp 525, Fig. 5.
Registered Keepers There is no registered keeper.
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Last Update 2020 Nov 23 02:33 (species record created: 2013 Jun 14 16:04)