Classification / Names
Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa
Teleostei (teleosts) >
Cyprinodontiformes (Rivulines, killifishes and live bearers) >
Rivulidae (Rivulines) > Rivulinae
Etymology: maricensis: The specific name is in reference to the occurrence of the new species in the Maricá lagoon system..
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; benthopelagic; pH range: 6.0 - 6.4. Tropical; 25°C - ? (Ref. 102354)
South America: river drainages connected to the Maricá lagoon system in Rio de Janeiro state, Brazil.
Size / Weight / Age
Maturity: Lm ? range ? - ? cm
Max length : 3.8 cm SL male/unsexed; (Ref. 102354)
Short description
Identification keys | Morphology | Morphometrics
Dorsal soft rays (total): 7 - 9; Anal soft rays: 14 - 16; Vertebrae: 33 - 34. Atlantirivulus maricensis can be diagnosed from all other species of the genus Atlantirivulus by the following combination of characters: lateral line divided into two sections (vs. single); lateral line with one neuromast by scale (vs. lateral line often interrupted by scales without neuromasts); scales in the longitudinal series 33-35 (vs. 30-31); vertebrae 33-24 (vs. 31-32); caudal fin with 30-31 rays (vs. 25 - 29); small, horizontally elongated black spot on dorsal portion of caudal-fin base in females, not contacting fin margin (vs. female caudal spot never horizontally elongated, often triangular or rectangular, reaching fin margin, sometimes spot absent); flank with horizontal rows of red dots in males and small light brown spots in females (vs. never a similar color pattern, red pigmentation when present often forming irregular bars or reticulations in males); caudal fin in males greenish yellow, sub-dorsal and sub-ventral portions bright yellow, dorsal and marginal region diffuse orangish grey, posterior marginal portion diffuse pale greyish yellow (vs. never a similar color pattern); small red spots on the basal and posterior portions of the dorsal fin in males (vs. red spots absent).
Found in creek under a forest remnant and in small shallow stream, partially protected by a secondary forest remnant (Ref. 102354).
Life cycle and mating behavior
Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larvae
Costa, W.J.E.M., 2014. Four new species of the genus Atlantirivulus (Cyprinodontiformes: Rivulidae) from the Brazilian Atlantic Forest. Verteb. Zool. 64(1):9-21. (Ref. 102354)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
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Internet sources
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01122 (0.00514 - 0.02450), b=3.04 (2.87 - 3.21), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
Trophic level (Ref.
69278): 3.2 ±0.4 se; based on size and trophs of closest relatives
Resilience (Ref.
120179): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
