Eigenmannia camposi, Lopes E Silva & Andrade & Maltoni & Lannes, 2020

Herrera-Collazos, Edgar Esteban, Galindo-Cuervo, Aleidy M., Maldonado-Ocampo, Javier A. & Rincón-Sandoval, Melissa, 2020, Three new species of the Eigenmannia trilineata species group (Gymnotiformes: Sternopygidae) from northwestern South America, Neotropical Ichthyology (Cambridge, England) 18 (1), No. 180085, pp. 1-28 : 12-16

Eigenmannia camposi , new species

urn:lsid:zoobank.org:act:B6260289-C9DC-4043-8B1F-657276087AFD

( Figs. 6–7 ; Tab. 8 )

Holotype. IAvH-P 9238, 137.0 mm LEA, (COI: GenBank MN832888 ), Colombia, Tolima, Honda, Magdalena river, Upper Magdalena basin, 5°12’05.56” N 74°43’56.63” W, J. A. Maldonado-Ocampo, W. G. R. Crampton & N. Lovejoy.

Paratypes. IAvH-P 7819, 17, 119.0–154.0 mm LEA, Colombia, Tolima, Honda, Magdalena river, Upper Magdalena basin, 5°12’05.56”N 74°43’56.63”W, W. G. R. Crampton. IAvH-P 7820, 5 + 1c&s, 123.0–148.0 mm LEA, Colombia, Tolima, Honda , Magdalena river, Upper Magdalena basin, 5°12’05.56”N 74°43’56.63”W, W. G. R. Crampton. IAvH-P 7821, 5, 130.0–145.0 mm LEA, Colombia, Tolima, Honda , Magdalena river, Upper Magdalena basin, 5°12’05.56”N 74°43’56.63”W, W. G. R. Crampton .

Non-types. CZUT-IC 1330 , 2 , 15.0–18.0 mm LEA, Colombia, Tolima, Cunday river, Upper Magdalena basin, 3°54’21.99”N 74°44’40.02”W. CZUT-IC 2331 , 1 , 14.0 mm LEA, Colombia, Tolima, La hoya gully, Upper Magdalena basin, 4°50’42.99”N 74°48’32.00”W . IAvH-P 9239 , 1 , 12.5 .0 mm LEA, Colombia, Tolima, Magdalena river, Upper Magdalena basin, 5°12’05.56”N 74°43’56.63”W , William G. R Crampton. ICN-MHN 2702 , 1 , 13.0 mm LEA, Colombia, Boyacá, Las Quinchas mountain range, La Colorada gully, Middle Magdalena basin, 05°50’40.54”N 74°20’38.87”W , José I. Mojíca. ICN-MHN 3589 , 1 , 14.1 mm LEA, Colombia, Tolima, Guamo river, Upper Magdalena basin, 5°04’09.09”N 74°53’23.88”W , A. Roa, E. F. Prieto & M. Santos. ICN-MHN 3783 , 1 , 12.5 mm LEA, Colombia, Tolima, Magdalena system, Cuamo river, Upper Magdalena basin, 5°11’30.53”N 74°54’42.05”W , M. Santos. ICN-MHN 18487 , 7 , 7.5–14.7 mm LEA, Colombia, Cesar, Magdalena system, Simaña river basin, El Carmen gully, Middle Magdalena basin, 8°38’51.11”N 73°37’30.70”W , Corpobiotica. IAvH-P 7818 , 8 , 11.4 –14.0 mm LEA, Colombia, Tolima, Magdalena river, Upper Magdalena basin, 5°12’05.56”N 74°43’56.63”W , W. G. R. Crampton. CZUT-IC 97 , 1 , 8.3 mm LEA, Colombia, Tolima, Potrerilla gully, Upper Magdalena basin, 4°16’58.00”N 75°01’54.01”W . CZUT-IC 987 , 1 , 11.7 .0 mm LEA, Colombia, Tolima, Anchique river, Upper Magdalena basin, 3°34’35.00”N 75°07’13.00”W . CZUT-IC 1332 , 1 , 11.6 mm LEA, Colombia, Tolima, Bernal gully, Upper Magdalena basin, 5°12’12.99”N 74°46’56.99”W . CZUT-IC 11567 , 6 , 4.4–16.8 mm LEA, Colombia, Tolima, Anchique river delta, Upper Magdalena basin, 3°35’34.00”N 75°04’59.45”W , C. Conde. CZUT-IC 11606 , 3 , 7.2–10.8 mm LEA, Colombia, Tolima, Batatas gully, Upper Magdalena basin, 4°00’30.99”N 74°50’31.99”W , C. Conde. ICN-MHN 3251 , 1 , 11.2 mm LEA, Colombia, Boyacá, Las Quinchas mountain range, Puerto Romero, Middle Magdalena basin, 5°50’09.80”N 74°20’20.88”W , J. I. Mojíca. ICN-MHN 7061 , 1 , 12.4 mm LEA, Colombia, Caldas, Norcasia. Manso river, Remolinos zone, Middle Magdalena basin, 5°40’00.01”N 74°46’00.01”W , J. I. Mojíca. CZUT-IC 11672 , 1 , 9.9 mm LEA, Colombia, Antioquia, branch of León river towards Suriqui river, Atrato , Darién basin, 7°50’38.00 N 76°50’05.99”W , F. Villa. CZUT-IC 11648 , 2 , 4.4-5.5 mm LEA, Colombia, Antioquia, León river, confluence with Tumaradocito creek, Atrato , Darién basin, 7°40’03.00”N 76°58’10.99”W , F. Villa.

Diagnosis. Eigenmannia camposi can be distinguished from its congeners of the E. trilineata species group, except E. besouro Peixoto, Wosiacki, 2016 by the number of premaxillary teeth: 27 in 3–4 rows (vs. 8–10 in 2 rows in E. muirapinima Peixoto, Dutra, Wosiacki, 2015 ; 8–12 in 2 rows in E. antonioi Peixoto, Dutra, Wosiacki, 2015 ; 9–10 in 2 rows in E. guairaca Peixoto, Dutra, Wosiacki, 2015 ; 11–15 in 3 rows in E. loretana Waltz, Albert, 2018 ; 13–16 in 3 rows in E. pavulagem Peixoto, Dutra, Wosiacki, 2015 ; 16 in 3 rows in E. microstomus Reinhardt, 1852 ; 17 in 3 rows in E. sayona Peixoto, Waltz, 2017 ; 17–20 in 3 rows in E. correntes Campos-da-Paz, Queiroz, 2017; 22–24 in 4 rows in E. matintapereira Peixoto, Dutra, Wosiacki, 2015 ; 24–25 in 4 rows in E. desantanai Peixoto, Dutra, Wosiacki, 2015 ; 25–26 in 4 rows in E. vicentespelaea Triques, 1996 ; 31–33 in 4 rows in E. trilineata ; 31–34 in 4–5 rows in E. zenuensis ; 32 in 4 rows in E. magoi and 35–40 in 5 rows in E. waiwai Peixoto, Dutra, Wosiacki, 2015 ); it can further be distinguished from E. besouro by the number of simple pectoral rays: ii–iii (vs. ii in E. besouro ) and by its larger suborbital depth: 30–37.7% HL (vs. 18.3–24.8% HL in E. besouro ).

Description. Morphometric and meristic data is shown in Tab. 8 . Total Length (mm): 157.0– 220.8 mm. Ovoid scapular foramen. 68–79 vertebrae. 13 precaudal vertebrae. 27 premaxillary teeth in 3–4 rows. 9–10 endopterygoid teeth in 1–2 rows. 20–22 teeth in dentary in 2 rows. Parietal and frontal bones articulated by synchondrosis by means of the frontoparietal suture (in this case the character is noteworthy the edges of the bones where they articulate have deep endings of variable size, but with a length greater than the teeth). Four or more foramina on the opercular opening of the frontal bone. Posterior-most arm of the lateral ethmoid bone elongated; articulates with the most anterior prolongation of the frontal bone forming a window. Width of anterior region of parasphenoid bone equal to width of two premaxillaries. Parasphenoid compressed towards posterior region (giving appearance of a glass bottle). Branchiostegal rays 5 in total, 4 is the largest. Urohyal, laminar and convex until middle par (from here it forms the urohial process, which extends to end of urohyal) Operculum upper edge rounded, bottom edge slightly extended. Endopterygoid with long ascendant process. Basihyal length ca. 1/2 of length of first ceratobranchial, slightly wider in anterior region, almost rectangular. Five ceratobranchials with width conserved. Five basibranchials of which 2–3 are well ossified. Four hypobranchials, first 3 well ossified. Tooth plate of the upper pharyngeal with 7 teeth. Tooth plate of the lower pharyngeal with 12 teeth. 10 cartilaginous gill rakers.

Coloration in alcohol. Background color pale yellow to dark orange. Head brown/ dark dorsally and rapidly becoming lighter through the snout. Lips and suborbital region with brown chromatophores slightly darkening the area. Body with four visible dark horizontal stripes: (1) Lateral-line stripe narrow and dark, one scale deep, from the first perforated scale to the caudal filament; (2) Superior medial stripe wide, formed by often scattered spots, extending from the mid-portion of the gas bladder to approximately half of the anal fin; (3) Inferior medial stripe dark and wide, almost two scales deep, well colored and darker in region of the caudal filament, generally starting near the anus and continuing until the end of the anal fin; (4) Stripe along anal-fin base dark, one and a half scales deep, extending along the base of the anal fin. Pectoral fin with scattered dark chromatophores generally near the base and anal fin hyaline. Dark humeral spot marking the beginning of the lateral-line stripe. Nape dark.

Geographic distribution. Eigenmannia camposi is known from the lower Atrato basin, and in the upper and middle Magdalena and Cauca river basins in Colombia ( Fig. 7 ).

Etymology. The specific epithet “ camposi ” is assigned to the new species in honor of Dr. Ricardo Campos-da-Paz for his contributions to our knowledge of gymnotiform fishes.

Figures

FIGURE 6 | Holotype IAvH-P 9238 for Eigenmannia camposi, scale bar 1 cm.

FIGURE 7 | Map illustrating the known geographic distribution of Eigenmannia camposi (circles), E. zenuensis (squares), and E. magoi (triangles). Red symbols indicate type localities.