Hypancistrus seideli Sousa, Sousa, Ribeiro, Sabaj, Zuanon & Py-Daniel, 2025, new species

Hypancistrus seideli, new species urn:lsid:zoobank.org:act: 70232D66-1D18-4AA4-9F2B-32DF7356A091 (Figs. 5–6; Tab. 2) Hypancistrus L66. — Stawikowski, 1990:520 (aquarium fish atlas; citation and brief description). — Seidel, Evers, 2005:588–90 (book; citation and brief description). — Seidel, Evers, 2005:576–79 (Book; citation and brief description). — Seidel, 2008:111 (book, citation and brief description). — Cardoso et al., 2016:209 (article on cytogenetics). — Araújo et al., 2017:300 (article on Xingu ornamental fishery). Hypancistrus L236. — Glaser, Glaser, 1995:94 (aquarium fish catalog, citation and brief description). — Schraml, Schäfer, 2004:172 (aquarium fish magazine report). — Seidel, Evers, 2005:592–94 (book; citation and brief description). — Seidel, 2008:113 (book, citation and pictured). — Evers, 2021:06 (book about the history of this morphotype on the trade). Hypancistrus L287. — Seidel, 2000:14 (aquarium fish catalog, citation and brief description). — Schraml, Schäfer, 2004:200 (atlas of aquarium fish). — Seidel, Evers, 2005:602 (Book). — Seidel, 2008:114 (book, citation and pictured). Hypancistrus L333. — Werner, 2003:35 (aquarium fish magazine, citation and brief description). — Schraml, Schäfer, 2004:215 (aquarium fish catalog). — Seidel, 2008:115 (book, citation and brief description). — Cardoso et al., 2016:209 (article on cytogenetics). — Reis et al., 2021 (article on feed management). — Borges et al., 2021:5 (citation). — Reis et al., 2022:3718 (article on sexual dimorphism). — Krings et al., 2023:3 (figure of mouth structures). Hypancistrus L399. — Werner, 2005:56–57 (aquarium fish magazine, citation and brief description). — Seidel, 2008:115 (book, citation and pictured). Hypancistrus L400. — Werner, 2005:56–57 (aquarium fish magazine, citation and brief description). — Seidel, 2008:115 (book, citation and pictured). Hypancistrus sp.1. — Camargo et al., 2013:173–81 (book, ornamental fish). — Ramos et al., 2015:97 (citation). Hypancistrus “complexo pão”. — Ramos et al., 2015:97 (citation). Hypancistrus sp. — Araújo et al., 2017:300 (citation). — Fitzgerald et al., 2018:105, fig. 1 (list of species). — Reis et al., 2021:2 (article on feed management). — Reis et al., 2022:3718 (article on sexual dimorphism). — Almeida et al., 2023 (article on cytogenetics). — Reis et al., 2023:02 (biotechnology and nutrition). Hypancistrus sp. “pão”. — Santos et al., 2023:29 (article on cytogenetics). Holotype. INPA-ICT 61050, 98.1 mm SL, Vitória do Xingu, Itaubinha, pedral, Pará State, Brazil, 02°53’21”S 51°56’26”W, 4 Nov 2008, L. Rapp Py-Daniel, H. Anatole & J. Bessa. Paratypes. All from Brazil, Pará State: ANSP 185238, 9, 72.2–95.3 mm SL, rio Acarai, upstream from confluence with rio Xingu at Porto de Moz, 02°04’34”S 52°20’42”W, 10 Nov 1994, A. M. Zanata, J. G. Lundberg & L. Rapp Py-Daniel. ANSP 194643, 13, 46.3–103.4 mm SL, rio Xingu, deep channel along right bank of river ca. 38 km southeast of Vitória do Xingu, 03°05’32.39”S 51°44’14.1”W, 21 Sep 2013, M. H. Sabaj, L. M. Sousa, A. Gonçalves, N. K. Lujan, D. B. Fitzgerald, P. Madoka Ito, A. Oliveira, R. Robles & ornamental fishermen. ANSP 194954, 15, 33.4–83.1 mm SL, rio Xingu (lower Volta Grande), rocky outcrop in main channel, 03°7’45”S 51°39’55.1”W, 20 Sep 2013, M. H. Sabaj, L. M. Sousa, A. Gonçalves, N. K. Lujan, D. B. Fitzgerald, P. Madoka Ito, A. Oliveira, R. Robles & fishermen. ANSP 194988, 18, 41.1–102.8 mm SL, rio Xingu, ca. 50 m off right bank of main channel ca. 1 km downstream of Porto de Moz, 01°44’42.4”S 52°14’53.9”W, 24 Sep 2013, M. H. Sabaj, A. Gonçalves, N. K. Lujan, D. B. Fitzgerald, P. Madoka Ito, A. Oliveira, R. Robles & fishermen. ANSP 195292, 2, 94.0–116.0 mm SL, rio Xingu, along left bank, ca. 10.4 km southwest of Senador José Porfírio, 02°38’54.3”S 52°01’41.9”W, 7 Mar 2014, M. Arce, A. P. Gonçalves, J. A. S. Zuanon, D. B. Fitzgerald, R. Robles, D. R. G. Ribeiro, L. M. Sousa & fishermen D. R. Costa (Dani), D. R. Costa (Ronca), N. S. Balão (Nelson) & A. S. Oliveira (Tonho). ANSP 195384, 9, 44.6–116.0 mm SL, rio Xingu, along right bank of major right braid, directly in front of Tapará village, ca. 14.5 km northeast (downstream) of Porto de Moz, 01°38’36.6”S 52°10’13.0”W, 5 Mar 2014, M. Arce, A. P. Gonçalves, J. A. S. Zuanon, D. B. Fitzgerald, R. Robles, D. R. G. Ribeiro, L. M. Sousa & fishermen D. R. Costa (Dani), D. R. Costa (Ronca), N. S. Balão (Nelson) & A. S. Oliveira (Tonho). AUM 74486, 4, 51.6–83.5 mm SL, same data as ANSP 194643. INPA-ICT 31472, 63, 38.26–107.33 mm SL, collected with holotype. INPA-ICT 40457, 16, 38.8-80.6 mm SL, Anapu, 03°28’20”S 51°11’52”W, 20 Sep 2013, M. Hardman, A. S. Oliveira, P. M. Ito, V. Machado, D. B. Fitzgerald, A. P. Gonçalves, L. M. Sousa & M. Sabaj-Péres. INPA-ICT 40502, 17, 42.6-85.3 mm SL, Senador José Porfírio, 02°35’27”S 51°57’15”W, 21 Sep 2013, D. R. G. Ribeiro, D. B. Fitzgerald, A. P. Gonçalves, M. Arce, D. Bastos, L. Rapp Py-Daniel, Dani & M. Sabaj-Péres. INPA-ICT 40494, 8, 34.3–54.8 mm SL, Anapu, 03°28’20”S 51°11’52”W, 21 Sep 2013, R. R. Reyes, D. B. Fitzgerald, A. P. Gonçalves, M. Arce, D. Bastos, L. Rapp Py-Daniel, L. M. Sousa, Dani & M. Sabaj-Péres. INPA-ICT 40520, 10, 35.8–101.0 mm SL, Vitória do Xingu, 02°52’48”S 52°00’36”W, 22 Sep 2013, A. R. Martins, D. R. G. Ribeiro, R. R. Reyes, D. B. Fitzgerald, J. Zuanon, M. Arce, A. P. Gonçalves, M. Sabaj-Péres. INPA-ICT 40533, 6, 31.6–55.4 mm SL, Vitória do Xingu, 02°52’48”S 52°00’36”W, 22 Sep 2013, A. R. Martins, D. R. G. Ribeiro, R. R. Reyes, D. B. Fitzgerald, J. Zuanon, M. Arce, A. P. Gonçalves & M. Sabaj-Péres. INPA-ICT 40614, 1, 68.5 mm SL, Porto de Moz, 01°44’54”S 52°14’18”W, 23 Sep 2013, A. R. Martins, D. R. G. Ribeiro, R. R. Reyes, D. B. Fitzgerald, J. Zuanon, M. Arce, A. P. Gonçalves, M. Sabaj-Péres. INPA-ICT 40739, 10, 34.1–70.5 mm SL, Porto de Moz, 01°44’54”S 52°14’18”W, 25 Sep 2013, A. R. Martins, D. R. G. Ribeiro, R. R. Reyes, D. B. Fitzgerald, J. Zuanon, M. Arce, A. P. Gonçalves & M. Sabaj-Péres. INPA-ICT 40747, 18, 54.0– 90.3 mm SL, Porto de Moz, 01°44’54”S 52°14’18”W, 24 Sep 2013, A. R. Martins, D. R. G. Ribeiro, R. R. Reyes, D. B. Fitzgerald, J. Zuanon, M. Arce, A. P. Gonçalves & M. Sabaj-Péres. INPA-ICT 40843, 15, 31.8–66.0 mm SL, Anapu, 03°28’20”S 51°11’52”W, 1 Oct 2013, A. R. Martins, D. R. G. Ribeiro, R. R. Reyes, D. B. Fitzgerald, J. Zuanon, M. Arce, A. P. Gonçalves & M. Sabaj-Péres. INPA-ICT 43082, 4, 47.6–89.5 mm SL, Senador José Porfírio, 02°35’27”S 51°57’15”W, 27 Oct 2140, A. R. Martins, D. R. G. Ribeiro, R. R. Reyes, D. B. Fitzgerald, J. Zuanon, M. Arce, A. P. Gonçalves & M. Sabaj-Péres. INPA-ICT 43152, 1, 96.0 mm SL, Senador José Porfírio, 02°35’27”S 51°57’15”W, 3 Mar 2014, L. M. Sousa, M. Sabaj-Péres, A. S. Oliveira & P. M. Ito. INPA-ICT 43213, 7, 62.5–113.3 mm SL, Porto de Moz, 01°44’54”S 52°14’18”W, 4 Mar 2014, L. M. Sousa, D. Fitzgerald, A. S. Oliveira, P. M. Ito, N. Lujan, R. Robles, V. Vargas & M. Sabaj-Péres. INPA-ICT 43249, 7, 61.6–77.0 mm SL, Porto de Moz, 01°44’54”S 52°14’18”W, 5 Mar 2014, L. M. Sousa, D. Fitzgerald, A. S. Oliveira, P. M. Ito, N. Lujan, R. Robles, V. Vargas & M. Sabaj-Péres. INPA-ICT 43260, 8, 2.1–84.5 mm SL, Porto de Moz, 01°44’54”S 52°14’18”W, 5 Mar 2014, L. M. Sousa, D. Fitzgerald, A. S. Oliveira, P. M. Ito, N. Lujan, R. Robles, V. Vargas & M. Sabaj-Péres. INPA-ICT 43295, 3, 46.5-65.0 mm SL, Porto de Moz, 01°44’54”S 52°14’18”W, 6 Mar 2013, L. M. Sousa, D. Fitzgerald, A. S. Oliveira, P. M. Ito, N. Lujan, R. Robles, V. Vargas, M. Sabaj-Péres. INPA-ICT 43334, 2, 80.1–102.6 mm SL, Porto de Moz, 01°44’54”S 52°14’18”W, 7 Mar 2014, L. M. Sousa, D. Fitzgerald, A. S. Oliveira, P. M. Ito, N. Lujan, R. Robles, V. Vargas & M. Sabaj-Péres. INPA-ICT 43546, 2, 48.8–50.9 mm SL, Altamira, 03°12’12”S 52°12’23”W, 13 Mar 2014, L. M. Sousa, D. Fitzgerald, A. S. Oliveira, P. M. Ito, N. Lujan, R. Robles, V. Vargas & M. Sabaj-Péres. INPA-ICT 43229 (same data as INPA-ICT 43213), 6, 70.8–107.0 mm SL, Porto de Moz, 01°44’54”S 52°14’18”W, 4 Mar 2014, L. M. Sousa, D. Fitzgerald, A. S. Oliveira, P. M. Ito, N. Lujan, R. Robles, V. Vargas & M. Sabaj-Péres. LIA 0021, 1, 61.4 mm SL, Belo Monte, 03°07’45”S 51°39’56”W, 28 Sep 2012, D. Bastos. LIA 5098, 5, 75.3–88.1 mm SL, rio Xingu, off right bank, ca. 1 km northwest of Porto do Moz, 01°44’42”S 52°14’54”W, 14 Nov 2014, M. H. Sabaj, L. M. Sousa & fishermen D. R. Costa (Dani), D. R. Costa (Ronca), N. S. Balão (Nelson) & A. S. Oliveira (Tonho). LIA 5105, 7, 75–113.9 mm SL, rio Xingu, off right bank, ca. 1 km northwest of Porto do Moz, 01°44’42”S 52°14’54”W, 14 Nov 2014, M. H. Sabaj, L. M. Sousa & fishermen D. R. Costa (Dani), D. R. Costa (Ronca), N. S. Balão (Nelson) & A. S. Oliveira (Tonho). LIA 5118, 2, 72.8–106.49 mm SL, rio Xingu, off right bank ca. 3 km north-northwest of Porto do Moz, 01°43’53”S 52°15’20”W, 14 Nov 2014, M. H. Sabaj, L. M. Sousa & fishermen D. R. Costa (Dani), D. R. Costa (Ronca), N. S. Balão (Nelson) & A. S. Oliveira (Tonho). LIA 5122, 2, 99.9 mm SL, rio Xingu, off right bank ca. 3 km north-northwest of Porto do Moz, 01°43’53”S 52°15’20”W, 14 Nov 2014, M. H. Sabaj, L. M. Sousa & fishermen D. R. Costa (Dani), D. R. Costa (Ronca), N. S. Balão (Nelson) & A. S. Oliveira (Tonho). LIA 5146, 19, 62.9–103.43 mm SL, rio Xingu, off upstream end of island, downstream of campsite 7, ca. 3.5 km northwest (downstream) of BR-230 ferry crossing on left bank (Belo Monte II), 03°06’19”S 51°43’28”W, 19 Nov 2014, M. H. Sabaj, L. M. Sousa & fishermen D. R. Costa (Dani), D. R. Costa (Ronca), N. S. Balão (Nelson) & A. S. Oliveira (Tonho). LIA 5153, 3, 34.2–67.37 mm SL, rio Xingu, off right bank at confluence of three major braids, just upstream of campsite 7, 03°07’45”S 51°39’55”W, 19 Nov 2014, M. H. Sabaj, L. M. Sousa & fishermen D. R. Costa (Dani), D. R. Costa (Ronca), N. S. Balão (Nelson) & A. S. Oliveira (Tonho). LIA 5161, 5, 62.3–80.2 mm SL, rio Xingu, off right bank ca. 20 km southeast of Vitória do Xingu, 02°58’51”S 51°51’32”W, 20 Nov 2014, M. H. Sabaj, L. M. S