Pimelodus navarroi Schultz, 1944

Villa-Navarro, Francisco Antonio, Acero, Arturo & Cala, Plutarco Cala, 2017, Taxonomic review of Trans-Andean species of Pimelodus (Siluriformes: Pimelodidae), with the descriptions of two new species, Zootaxa 4299 (3), pp. 337-360: 340-343

publication ID

https://doi.org/10.11646/zootaxa.4299.3.2

publication LSID

lsid:zoobank.org:pub:7838D461-3D2E-4034-8CA1-ECFE7BD58736

persistent identifier

http://treatment.plazi.org/id/03F68789-FF96-FD29-3AED-F947DF94C42A

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scientific name

Pimelodus navarroi Schultz, 1944
status

 

Pimelodus navarroi Schultz, 1944 

Pimelodus grosskopfii navarroi Schultz, 1944: 207  , pl. 1 (fig. c). Type locality: Río Palmar at bridge, 70 km southwest of Maracaibo, Venezuela. Holotype: USNM 121174View Materials  . Paratypes: MBUCV-V 10934 [ex USNM 121172] (1), MCZ [ex USNM 121173] (1), UMMZ 142489 [ex USNM 121172] (1), USNM 101614 (1), 12 1172 (17, now 16), 121173 (4, now 3).

Diagnosis. Pimelodus navarroi  differs from P. coprophagus  in having a shorter predorsal distance (37.2–40.6% SL vs. 39.0–42.7% SL), a shorter head (24.4–27.8% SL vs. 27.1–30.7% SL), and a longer adipose fin (18.1–22.5% SL vs. 14.1–19.4% SL); it differs from P. yuma  n. sp. in having a narrower interorbital width (28.9–35.9% HL vs. 36.2–42.8% HL) and a wider mouth (36.4–44.7% HL vs. 27.7–34.9% HL); it differs from P. grosskopfii  and P. crypticus  n. sp. in having a shorter adipose fin (18.1–22.5% SL vs. 23.4–28.8% SL) and a shorter distance between the urogenital papilla and the anal-fin base (11.8–14.6% SL vs. 14.6–18.7% SL); it differs from P. punctatus  in its distribution (Lake Maracaibo Basin vs. Atrato, Baudó, and Tuyra River Basins). Additionally, it differs from P. blochii  , P. crypticus  n. sp. and P. yuma  n. sp. in having dark spots on the body (vs. body without dark spots or stripes).

Description. N=34. Morphometric data presented in Table 1. Body as deep as wide; roof of cranium ornamented with smooth but visible striations. Eye diameter less than interorbital width. Snout slightly convex, projecting beyond mandibular symphysis. Mouth subterminal, when closed more than half of premaxillary tooth patch exposed, those teeth small, conical and narrow. Fontanel open from mesethmoids to frontals, ending at vertical through posterior margin of eye. Maxillary barbels reach caudal-fin base; inner mental barbels reach pectoral-fin bases; outer mental barbels reach pelvic-fin base.

Dorsal fin lepidotrichia II,6; the first a spinelet narrow and angular, spine strong, straight and pointed. Adipose fin long, its margin rectangular, anterior apex at vertical through middle of anal-fin base. Pectoral fin I,10; spine strong, sharp, pointed, forming slight arc. Pelvic fin i,5; with first branched ray longest, inserted at vertical through penultimate dorsal-fin ray. Anal fin iv,7–8; first branched ray longest. Caudal fin i,15,i; forked, its lobes pointed, dorsal lobe slightly longer than ventral.

Lateral line complete, extending beyond caudal-fin base for half the length of middle caudal-fin rays. Cleithral process extensive, strong, triangular, posterodorsal and ventral margins straight. Apparently without sexual dimorphism.

Color in alcohol. ( Fig. 5View FIGURE 5) Body light tan, covered with dark spots uniformly distributed along the sides of body and the head, including cheeks and snout. Lateral line and ventral region whitish. Base of dorsal spine dark. All fins yellow, turning hyaline distally; ventral caudal-fin lobe without dark diffuse band; upper margin of adipose fin hyaline; dorsal surface of maxillary barbels tan.

Distribution. Maracaibo Lake Basin in Colombia and Venezuela ( Fig. 4View FIGURE 4).

TABLE I. Morphometric đata for Pimelodus blochii  , P. coprophagus  , anđ P. navarroi  expresseđ (except for whole-fish stanđarđ length, mm) in percent stanđarđ length (%SL) or heađ length (%HL).

Pimelodus blochii  Pimelodus coprophagus  Pimelodus navarroi 

USNM

Smithsonian Institution, National Museum of Natural History

Kingdom

Animalia

Phylum

Chordata

Class

Actinopterygii

Order

Siluriformes

Family

Pimelodidae

Genus

Pimelodus

Loc

Pimelodus navarroi Schultz, 1944

Villa-Navarro, Francisco Antonio, Acero, Arturo & Cala, Plutarco Cala 2017
2017
Loc

Pimelodus grosskopfii navarroi

Schultz 1944: 207