Suckermouth Armored Catfishes

Figure 5.a Habitat at type locality of Pseudancistrus zawadzkii: rio Tapajós, municipality of Itaituba, Pará State, Brazil b habitat at paratype locality: rio Tracuá, Tapajós river basin, municipality of Itaituba, Pará State, Brazil.

Figure 5.The Rio Paraíba do Sul basin indicating the type locality of Pareiorhina hyptiorhachis in Ribeirão Fernandes, a tributary of Rio Pomba, Rio Paraíba do Sul basin, 21°14'47"S, 43°34'07"W.

Figure 5.Map of the distribution of A Hisonotus oliveirai. Star = holotype locality, ribeirão Cambira. Diamonds = paratype localities B Hisonotus paresi. Star = holotype locality, riacho Águas Claras. Diamonds = paratype localities.

Figure 6.Hisonotus paresi, holotype, MZUSP 115062, female, 26.2 mm SL, riacho Águas Claras, affluent rio Sepotuba, rio Paraguay basin, municipality of Santo Afonso, Mato Grosso State.

Figure 2.Variation in hypertrophied series of anterolateral (A, C, E) and anterodorsal (B, D, F) odontodes across three species. A Hisonotus oliveirai, paratype, NUP 9839, female, 25.8 mm SL, small odontodes B Hisonotus oliveirai, paratype, NUP 9839, female, 25.8 mm SL, small odontodes C Hisonotus paresi, paratype, NUP 10928, male, 24.2 mm SL, small odontodes D Hisonotus paresi, paratype, NUP 10928, male, 24.2 mm SL, small odontodes E Hisonotus insperatus, LBP 1316, 24.7 mm SL, large and conspicuous odontodes F Hisonotus insperatus, LBP 1316, 24.7 mm SL, large and conspicuous odontodes.

Figure 7.Hisonotus paresi, paratype, NUP 10928, male, 24.2 mm SL A Ventral view of abdominal plates B lateral trunk plates; cranial bones and dermal plates of the head in dorsal C and lateral D view. Black arrows (D) indicate an extra plate that is absent in the right side of the same specimen. Scale bars: 1 mm.

Figure 4.Ventral view of abdominal region of three species of Hisonotus, arrows indicate anal membrane in Hisonotus oliveirai (A, D) and Hisonotus paresi (B, E) contrasting with the lack of the anal membrane in Hisonotus chromodontus (C, F). A Hisonotus oliveirai, MZUSP 115061, holotype, female, 26.4 mm SL B Hisonotus paresi, MZUSP 115062, holotype, female, 26.2 mm SL C Hisonotus chromodontus, LBP 7964, female, 28.1 mm SL D Hisonotus oliveirai, NUP 3578, male, 27.1 mm SL E Hisonotus paresi, NUP 10928, male, 24.2 mm SL F Hisonotus chromodontus, LBP 12278, male, 26.7 mm SL.

Figure 5.Map of the distribution of A Hisonotus oliveirai. Star = holotype locality, ribeirão Cambira. Diamonds = paratype localities B Hisonotus paresi. Star = holotype locality, riacho Águas Claras. Diamonds = paratype localities.

SAMSUNG TECHWIN VLUU NV10, NV10

Panasonic DMC-FZ50

NIKON CORPORATION NIKON D3

Panasonic DMC-FZ50

NIKON E4500

NIKON CORPORATION NIKON D80

Panasonic DMC-FZ50

Canon Canon PowerShot A650 IS

Canon Canon PowerShot A650 IS

Canon Canon PowerShot A650 IS

Canon Canon PowerShot A650 IS

NIKON CORPORATION NIKON D300