Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Siluriformes
(Catfish) > Loricariidae
(Armored catfishes) > Hypostominae
Etymology: Andeancistrus: Derived from 'Andean', a reference to the mountains from which this genus originates, and 'ancistrus', a root name for many Hypostominae genera that have clusters of enlarged evertible cheek.
Andeancistrus eschwartzae, new species
Figure 4; Tables 1, 2
Holotype.—MEPN 14780 (ex. ROM 93927), 143.5 mm SL,
Ecuador, Morona-Santiago Province, Palora Canton, Sangay
Sector, Pastaza River drainage, Amundalo River 10.3kmWSW
of Palora, 01u44954.900S, 78u02939.780W, 953 m a.s.l., D. C.
Taphorn, R. Barriga, A. Jackson, V. Roma´n, 8 September 2012.
Paratypes.—All collected with holotype: ANSP 182818, 6,
51.2–115.2 mm SL; AUM 64664, 6, 52.9–117.2 mm SL; ROM
93927, 7, 26.2–125.9 mm SL.
Diagnosis.—Andeancistrus eschwartzae can be diagnosed from
its only congener, A. platycephalus, by having black to dark
gray base color of head and body (Fig. 4; vs. light gray,
Fig. 2), irregularly shaped round to vermiculate yellow-gold
spots smaller than half naris diameter evenly distributed
across head, lateral and dorsal surfaces of body and fin rays
(Fig. 4; vs. white to blue uniformly round spots, Fig. 2), and
by lacking enlarged clusters of odontodes (keels) at posteromedial
apex of most lateral body plates (Fig. 4; vs.
odontode clusters present, Fig. 2).
Description.—Morphometrics in Table 1 and meristics in
Table 2. Largest specimen 143.5 mm SL. Body depth
increasing from tip of snout to greatest body depth at
predorsal plates, decreasing to dorsalmost insertion of
caudal fin. Dorsal profile convexly rounded between snout
and supraoccipital, with very subtle hump at predorsal
plates of adults. Ventral profile flat from snout to base of
caudal fin. Ossified dermal plates with small odontodes
covering head, body flanks, and ventral surface of tail
posterior of anal-fin origin. Plates absent from abdomen.
Cheek plates having nine to 38 enlarged, distally slightly
hooked cheek odontodes (mode 14), longest odontodes
never extending past opercular flap. Orbit positioned
dorsally on head at approximately 45u from sagittal plane
in anterior view. Snout broadly rounded in dorsal view.
Oral disk occupying majority of ventral surface of head
anterior of cleithrum. Teeth minute, bicuspid, with cusps
bent 90u toward mouth opening. Single digitate papilla
extending ventrally from dorsal part of premaxillary symphysis;
single cluster of low papillae at middle of interior
surface of each mandible. Maxillary barbel short, attached to
lower lip along most of length; ventral surface of labial disk
with low hemispherical papillae decreasing in size distally.
Dorsal-fin spinelet small, inconspicuous, often covered
with skin; posteriormost dorsal-fin ray free from body;
reaching to within two or three plate rows of adipose-fin
spine when adpressed. Pectoral fin reaching just beyond
pelvic-fin base when adpressed, spine having enlarged
odontodes along posterodorsal and distal surfaces. Pelvicfin
spine not reaching anal-fin origin when adpressed.
Adipose-fin spine straight or slightly curved, adnate to
caudal peduncle via fleshy membrane. Caudal-fin margin
straight, oblique, with ventral caudal-fin spine extending
beyond dorsal caudal-fin spine.
Body broadest at cleithrum; posterior margin of exposed
process of cleithrum rounded. First one to three midventral
plates gently bent forming rounded ridge between verticals
through pectoral- and dorsal-fin origins.
Environment: milieu / climate zone / depth range / distribution range
Freshwater; demersal. Tropical
South America: Zamora River basin in the upper Marañon River drainage, Ecuador.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 14.5 cm TL male/unsexed; (Ref. 36713)
Morphology | Morphometrics
soft rays: 3. Andeancistrus platycephalus is distinguished from its only congener, A. eschwartzae, by having light gray base color of head and body (vs. black to dark gray), uniformly shaped round white to light blue spots smaller smaller than half naris diameter evenly distributed across head, lateral and dorsal surfaces of body and fin rays (vs. irregularly shaped round to vermiculate yellow-gold spots); and by the presence of enlarged clusters of odontodes (keels) at posteromedial apex of most lateral body plates (vs. absence of odontode clusters) (Ref. 104644).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Lujan, N.K., V. Meza-Vargas and R. Barriga-Salazar, 2015. Two new Chaetostoma group (Loricariidae: Hypostominae) sister genera from opposite sides of the Andes Mountains in Ecuador, with description of one new species. Copeia 103(3):651-663. (Ref. 104644)
IUCN Red List Status (Ref. 119314)
CITES (Ref. 115941)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningSpawning aggregationFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01514 (0.00687 - 0.03334), b=2.95 (2.76 - 3.14), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Resilience (Ref. 69278
Vulnerability (Ref. 59153
): Low vulnerability (10 of 100) .