Andeancistrus eschwartzae

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Andeancistrus eschwartzae Lujan, Meza-Vargas & Barriga-Salazar, 2015

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drawing shows typical species in Loricariidae.

Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Teleostei (teleosts) > Siluriformes (Catfishes) > 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. odontodes. Andeancistrus eschwartzae, new species F31AA0 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;  eschwartzae: Named for Ms. Eugenia Schwartz, an artist and benefactor whose generous support through the Coypu Foundation made this research possible..

Environment: milieu / climate zone / depth range / distribution range Ecology

Freshwater; demersal. Tropical

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

South America: Amundalo River, Pastaza River drainage in Ecuador.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 14.4 cm SL male/unsexed; (Ref. 104644)

Short description Morphology | Morphometrics

Dorsal soft rays (total): 8; Anal soft rays: 3 - 4. Andeancistrus eschwartzae is distinguished from its only congener, A. platycephalus, by possessing black to dark gray base color of head and body (vs. light gray), 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 (vs. white to blue uniformly round spots), and by the absence of enlarged clusters of odontodes (keels) at posteromedial apex of most lateral body plates (vs. presence of odontode clusters) (Ref. 104644).

Biology     Glossary (e.g. epibenthic)

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator : Fisch-Muller, Sonia | Collaborators

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. 126983)


Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans


Human uses

FAO - Publication: search | FishSource |

More information

FAO areas
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Food consumption
Common names
Spawning aggregation
Egg development
Larval dynamics
Aquaculture profile
Allele frequencies
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Stamps, Coins Misc.
Swim. type
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Internet sources

AFORO (otoliths) | Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: genus, species | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: genome, nucleotide | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | Tree of Life | Wikipedia: Go, Search | World Records Freshwater Fishing | Zoobank | Zoological Record

Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.7500   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01230 (0.00531 - 0.02848), b=2.97 (2.77 - 3.17), in cm total length, based on LWR estimates for this Subfamily-BS (Ref. 93245).
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).