| Family: |
Rivulidae (Rivulines), subfamily: Rivulinae |
| Max. size: |
10.23 cm SL (male/unsexed); 7.51 cm SL (female) |
| Environment: |
benthopelagic; freshwater, non-migratory |
| Distribution: |
South America: Bolivia. |
| Diagnosis: |
Dorsal soft rays (total): 12-12; Anal soft rays: 19-19; Vertebrae: 36-36. This species is similar to M. heterostigma and M. ortegai / M.quiii by the presence of oblique rows of red brown dots on the sides of body in males (vs. absence) and it differs from these species by having a short pectoral fin in males, reaching pelvic fin origin (vs. long pectoral fin, reaching up to seventh anal fin ray); differs from its congeners by the following set of characters - greater numbers of scales in the lateral 40-42 (vs. 32-39), transverse scale series 11-12 (vs. 8-10), circumpeduncular series 22 (vs. 14-20) and, in males, the anal fin with large areas dark yellow and broad orange margin on ventral and posterior portions of caudal fin (vs. brown) (Ref. 130493). |
| Biology: |
The type series were collected from an ephemeral pool measuring approximately 15 m long, 5 m wide, and 0.3 to 0.9 m deep, with dense aquatic vegetation, brown, turbid water with the following characteristics (measured on late morning): total dissolved solids: 112 ppm, pH 7.1-7.3, german hardness 5-9 dGH, temperature at the surface: 29.1°C. Another fish was present, Pterolebias longipinnis (Ref. 130493). |
| IUCN Red List Status: |
Not Evaluated (N.E.) Ref. (130435)
|
| Threat to humans: |
harmless |
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