Hasemania crenuchoides Zarske & Géry, 1999

Serra, Jane Piton & Langeani, Francisco, 2015, A new Hasemania Ellis from the upper rio Paraná basin, with the redescription of Hasemania crenuchoides Zarske & Géry (Characiformes: Characidae), Neotropical Ichthyology (Neotrop. Ichthyol.) 13 (3), pp. 479-486 : 483-485

Hasemania crenuchoides Zarske & Géry, 1999

Figs. 4-5

Hasemania crenuchoides Zarske & Géry, 1999 (original description, type locality: corrego Planaltina, oberer rio São Bartolomeu (mündend in den rio Corumba, Nebenfluss des rio Paranaiba, La-Plata system), 1050 m über NN, nahe Planaltina, nordöstl. von Brasilia, Distrito Federal, Bundesstaat Goias, Brasilien, etwa 15°38’ südl. Breite und 47°40’ westl. Länge); Lima et al., 2003 (128: check list for the genus); Bertaco & Malabarba, 2007 (compared to H. nambiquara ); Langeani et al., 2007 (partim, 121: holotype (MZUSP 52723) and two paratypes (MHNG 2594.044) morphometrics and meristics comparisons with Hasemania specimens from rio Grande (= Hasemania uberaba ); Bertaco & Carvalho, 2010 (compared to H. kalunga ); Langeani & Serra, 2010 (733: rhinosphenoid bone comparisons with Coptobrycon bilineatus ); Zanata & Serra, 2010 (compared to H. piatan ).

Diagnosis. Hasemania crenuchoides is distinguished from its congeners by having a black vertically-elongate humeral spot (vs. absent, except from H. kalunga , H. nambiquara , H. piatan , and H. uberaba ), ii,8 dorsal-fin rays (vs. ii,9, except H. hanseni , H. kalunga , H. melanura , H. nana , and H. uberaba ); 11-14 branched anal-fin rays (vs. 16-19, except H. kalunga , H. melanura , H. nana , H. piatan , and H. uberaba ), infraorbitals four and five (vs. a single ossification in the position occupied by infraorbitals four and five, except H. hanseni , H. maxillaris , H. melanura , H. nambiquara , and H. nana ), and presence of scales covering the anal-fin base (vs. absent, except H. hanseni , H. maxillaris , H. melanura , H. nambiquara , H. nana , and H. uberaba ). Additionally, H. crenuchoides differs from H. melanura by having maxillary teeth (vs. absent); from H. nambiquara by the absence of a broad black band in the midlateral line, from the humeral region to the caudalfin (vs. presence), and from H. piatan by possessing 19 principal caudal-fin rays (vs. 18).

Description. Morphometric data in Table 2 . Body deep and transversely rounded. Greatest body depth between tip of supraoccipital spine and dorsal-fin origin. Head moderately deep and rounded anteriorly in lateral profile; eye small. Dorsal profile of head distinctly convex from margin of upper lip to region of vertical through anterior nostril, nearly straight from that point to tip of supraoccipital spine. Dorsal profile of body slightly convex from tip of supraoccipital spine to dorsal-fin origin, posteroventrally inclined along dorsal-fin base, straight from terminus of dorsal-fin base to origin of caudal-fin rays. Ventral profile of head and body convex from margin of lower lip to analfin origin, straight and posterodorsally inclined along analfin base, nearly straight in caudal peduncle. Infraorbital series complete. Rhinosphenoid cartilaginous.

Jaws equal, mouth terminal. Premaxillary dentition in two rows. Outer row with 3(4), 4*(25) or 5(1) tricuspid teeth and inner row with 5*(30) irregularly placed teeth with 5 cusps. Maxilla with 1(4), 2*(24), 3(4), or 4(1) tricuspid teeth along anterior dentigerous portion of bone. Dentary with single row of 4*(27) or 5(4) larger teeth with 5 cusps anteriorly followed by 5(2) or 6(2) distinctly smaller ones, with 1 or 3 cusps.

Dorsal-fin rays ii,8*(38). Anal fin short, iii-iv,11(3), 12*(24), 13(9), or 14(2) rays. Caudal fin forked, lobes rounded and similar in size, with some scales covering basal portion of rays. Principal caudal-fin rays i,8/8,i(1); i,9/8,i(33); or i,9/9/i*(1). Pectoral-fin rays i,9(5), 10(16), 11*(16) or 12(1), its tip falling short of pelvic-fin insertion. Pelvic-fin rays i,5(4), 6(32) or 7*(1). Adipose fin absent.

Scales cycloid. Lateral line incomplete. Pored scales: 5(1), 7(1), 9(2), 11(3), 12*(9), 13(7), 14(5), 15(4), 16(4) or 17(2). Longitudinal scale series including perforated scales 20(1), 22(2), 23(5), 24(4), 25(10), 26(7), 27*(5), 28(1), 29(1), 31(1) or 33(1). Horizontal scale rows between lateral line and dorsal-fin origin 4(1) or 5*(37). Horizontal scale rows between lateral line and pelvic-fin origin 4*(38). Scale sheath along basal portion of anal-fin rays with 4*(6), 5(12), 6(12), 7(5), 8(2) or 9(1) scales in single series. Horizontal scale rows around caudal peduncle 13(3), 14*(34) or 15(1). Scales between tip of supraoccipital process and dorsalfin origin 10(6), 11(13), 12(11), 13*(1) or 14(1). Vertebrae 33(2) or 34(2). First gill arch with 6(2) epibranchial, 8(2) ceratobranquial, 1(2) on cartilage between ceratobranchial and epibranchial, and 2(2) hypobranchial gill-rakers.

Color in alcohol. Based on recently collected specimens. Preserved specimens with yellowish bodies and darkbrown chromatophores concentrated more dorsally and along posterior margin of scales (mainly in midportion), resulting in slightly reticulated pattern on body; humeral spot irregular, inconspicuous and vertically elongated, midlateral stripe extending from slightly behind humeral spot to middle caudal-fin rays. Fins with chromatophores more concentrated along rays than on membranes ( Figs. 4-5 ).

Color in life. Body and head yellowish, more so along ventral portion of head, opercular series and anterior portion of body. Pectoral fin yellowish. Dorsal fin mostly hyaline. Pelvic fin reddish to yellowish. Anal fin red overall but turning yellowish along posteriormost rays. Caudal fin reddish along most superior and inferior rays and yellowish along median ones.

Sexual dimorphism. No secondary sexual characters were observed.

Distribution. Hasemania crenuchoides seems to be restricted to the streams from the upper rio Paraná and upper rio Tocantins in the Distrito Federal, Brazil. This is the first reference to the species for the rio Tocantins basin.

Material Examined. Brazil: Distrito Federal: Upper rio Paraná drainage. DZSJRP 11039 , 47 (4 c&s, 33.8-50.7 mm SL) 20.3-58.0 mm SL, and DZSJRP 14222 , 4 , 42.9-52.9 mm SL, córrego Paranoazinho, tributary of rio Sobradinho. MHNG 2594.044 , 2 of 5 paratypes, 28.0 and 38.0 mm SL; and MZUSP 52732 , 63.7 mm SL, holotype, male, córrego Planaltina. Upper rio Tocantins drainage. DZSJRP 14185 , 20 , 35.6-78.2 mm SL, ribeirão da Contagem, Contagem Biological Reserve .

Figures

Fig. 4. Hasemania crenuchoides, all from Brazil, Distrito Federal, rio Paranaíba system, upper rio Paraná basin: (a) holotype, MZUSP 52732, male, 63.7 mm SL, córrego Planaltina, rio São Bartolomeu, rio Corumbá drainage; (b) DZSJRP 11039, female, 57.9 mm SL, córrego Paranoazinho, tributary of rio Sobradinho, rio São Bartolomeu basin. rio Maranhão system, rio Tocantins basin; (c) DZSJRP 14185, female, 64.5 mm SL, ribeirão da Contagem, Contagem Biological Reserve.

Fig. 5. Jaws of Hasemania crenuchoides, left side, DZSJRP 11039, 51.5 mm SL. Scale bar = 2 mm.

Tables

Table 2. Morphometric data of holotype (H) (MZUSP 52732), paratypes (MHNG 2594.044) and non-type specimens (DZSJRP 11039 and DZSJRP 14185) of Hasemania crenuchoides. SD = standard deviation, N = 38 including the holotype and paratypes.

	H	Paratypes	Range	Mean	SD
Standard length (mm)	63.7	28.0-38.0	28.0-63.7	41.9
Percents of Standard length
Body depth	34.4	32.8-36.0	27.8-36.1	31.4	1.7
Head length	29.7	27.9-30.0	26.2-30.0	28.0	0.9
Predorsal distance	56.8	52.6-55.0	50.1-56.8	52.6	1.3
Preventral distance	51.2	48.4-50.0	47.1-51.9	49.5	1.1
Pelvic-anal fin distance	16.5	17.5-18.2	15.3-19.5	17.4	1.0
Caudal-peduncle depth	14.3	12.8-12.9	12.2-14.3	13.3	0.5
Caudal-peduncle length	15.7	17.5-17.6	12.8-18.1	16.2	1.1
Dorsal-fin base length	12.6	9.7-10.0	9.7-15.0	13.1	1.3
Anal-fin base length	18.7	18.9-19.5	17.5-22.7	19.9	1.3
Pectoral-fin length	18.2	18.7-21.1	18.2-22.5	20.3	1.1
Pelvic-fin length	14.1	13.4-14.3	10.1-17.9	15.2	1.4
Dorsal-fin length	21.4	21.3-23.9	21.3-28.6	25.4	1.7
Anal-fin length	16.0	16.8-17.6	16-21.6	19.2	1.4
Caudal-fin length	20.4	18.9-22.5	18.2-24.2	21.1	1.5
Percents of Head length
Head depth	97.9	85.7-94.3	85.6-97.9	90.3	2.9
Orbital diameter	25.4	32.1	25.4-34.8	31.3	2.0
Snout length	26.5	22.6	20.2-26.5	22.6	1.3
Interorbital width	33.9	32.1-34.0	30.9-35.5	33.2	1.3