Aphanotorulus gomesi ( Fowler 1941 )

Ray, C. Keith & Armbruster, Jonathan W., 2016, The genera Isorineloricaria and Aphanotorulus (Siluriformes: Loricariidae) with description of a new species, Zootaxa 4072 (5), pp. 501-539 : 517-518

Aphanotorulus gomesi ( Fowler 1941)

( Fig. 9 )

Plecostomus iheringi Fowler, 1941a: 150 , figs. 50–52. Type locality: Ceará [ Brazil].

Holotype: ANSP 69409. Preoccupied by Plecostomus iheringii Regan, 1908 ; replaced by Plecostomus gomesi Fowler, 1942 . Plecostomus gomesi Fowler, 1942 : [1]. Type locality: Ceará [ Brazil]. Holotype: ANSP

69409. Replacement name for Plecostomus iheringi Fowler, 1941 ; preoccupied by Plecostomus iheringii Regan, 1908 .

Material examined. Holotype: ANSP 69409, Ceará [ Brazil].

Diagnosis. Known only from holotype. Aphanotorulus gomesi is diagnosed from A. ammophilus and A. unicolor by a single, large buccal papilla (vs. multiple buccal papillae); from all other Aphanotorulus only by its distribution (thought to be found only in the Jaguaribe River, Ceará state, Brazil).

Description. Morphometrics given in Table 4 . Head moderately compressed. Suppraoccipital crest not elevated, with posterior edge sloping gently into nape. Interorbital surface flat. Nape slightly increasing in depth posteriorly. Pectoral fin reaches past point of insertion of pelvic fin. Depressed pelvic spine reaches point of insertion of the anal fin.

Lateral line plates 29; dorsal-fin base plates eight; folded dorsal plates 12; plates between dorsal and adipose fin seven; adipose fin plates two; anal-fin base plates two; plates from anal fin insertion to last plate on caudal peduncle 16; plates in folded pectoral fin five; number of teeth on dentary 24; number of teeth on premaxilla 25.

Color in alcohol. Dark tan background. Spots small to medium in size; moderately dense (less background color showing) on head. Few if any spots visible along dorsal and lateral sides of body. Ventral surface with no spots. Spots on fin rays similar to those on body. No patterns on paired-fin rays. Dorsal-fin membrane with two distinct rows of spots between each fin ray. Caudal fin with spots in vertical bands. Lower caudal fin lobe dark in color.

Distribution. Aphanotorulus gomesi is only known from its type locality. No other specimens are known (Fig. 10).

Figures

FIGURE 9. Dorsal, lateral, and ventral views of Aphanotorulus gomesi, ANSP 69409 (holotype), 141.3 mm SL Photograph by Kyle Luckenbill. Scale = 1 cm.