First records of Paraloricaria commersonoides (Devincenzi 1943) (Siluriformes: Loricariidae) in Argentina Author Liotta, Jorge Museo Regional de Ciencias Naturales “ A. Scasso ”, Don Bosco 580, 2900 San Nicolás, Buenos Aires, Argentina & Museo Regional de Ciencias Naturales “ A. Scasso ”, Don Bosco 580, 2900 San Nicolás, Buenos Aires, Argentina & Coordinación de Pesca Continental, Dirección de Planificación Pesquera, Subsecretaría de Pesca y Acuicultura, SAGyP. Buenos Aires, Argentina Author Loureiro, Marcelo Laboratorio Zoología de Vertebrados, Departamento de Ecología y Evolución, Facultad de Ciencias, UDELAR, Montevideo, Uruguay Author Arrieta, Pablo Museo Regional de Ciencias Naturales “ A. Scasso ”, Don Bosco 580, 2900 San Nicolás, Buenos Aires, Argentina & Coordinación de Pesca Continental, Dirección de Planificación Pesquera, Subsecretaría de Pesca y Acuicultura, SAGyP. Buenos Aires, Argentina Author Balboni, Leandro Museo Regional de Ciencias Naturales “ A. Scasso ”, Don Bosco 580, 2900 San Nicolás, Buenos Aires, Argentina & Coordinación de Pesca Continental, Dirección de Planificación Pesquera, Subsecretaría de Pesca y Acuicultura, SAGyP. Buenos Aires, Argentina Author Fuchs, Daniela Museo Regional de Ciencias Naturales “ A. Scasso ”, Don Bosco 580, 2900 San Nicolás, Buenos Aires, Argentina & Coordinación de Pesca Continental, Dirección de Planificación Pesquera, Subsecretaría de Pesca y Acuicultura, SAGyP. Buenos Aires, Argentina & Museo Regional de Ciencias Naturales “ A. Scasso ”, Don Bosco 580, 2900 San Nicolás, Buenos Aires, Argentina text Zootaxa 2024 2024-02-05 5406 2 390 396 http://dx.doi.org/10.11646/zootaxa.5406.2.11 journal article 287328 10.11646/zootaxa.5406.2.11 fc335c1e-4a75-4732-8d1a-cca322940413 1175-5326 10618111

TABLE 2. Comparative morphometric measures of the three known species of Paraloricaria. Avg: average; SD: standard deviation.

Character		Paraloricaria vetula				Paraloricaria agastor			Paraloricaria commersonoides
	n	Range	Avg	SD	n	Range	Avg	SD	n	Range	Avg	SD
Standard length (SL):	12	94.6–430	329	120.4	22	225–388	315.9	41.2	5	145.5–355	276.4	108.3
Percentage of SL
Predorsal length	12	30.6–34.2	32.7	1.0	22	24.9–33.7	32.1	1.8	4	32.3–34.2	33.3	0.8
Postanal length	12	45.7–51.7	49.2	1.9	22	33.5–50.8	48.0	3.5	4	39.6–49.0	45.5	4.1
Dorsal spine length	11	19.0–23.9	22.7	1.4	21	13.7–30.5	24.7	3.8	4	15–22.2	17.8	3.1
Anal spine length	12	14.8–18.4	16.3	0.9	22	14.0–19.7	18.1	1.3	4	14–15.2	14.5	0.5
Pectoral spine length	12	19.6–27.3	24.1	2.1	22	20.0–27.5	25.9	1.7	4	17.5–19.7	18.9	1.0
Pelvic spine length	12	14.0–20.5	18.0	1.6	22	15.1–23.6	21.0	1.8	3	14.8–19.6	16.4	2.2
Upper caudal spine length	6	11.9–80.7	40.9	25.9	12	12.9–97.1	37.3	28.3	1	19.7–19.7	19.7	-
Lower caudal spine length	9	12.4–17.3	14.6	1.8	17	10.2–17.0	15.5	1.5	2	15.4–16.2	15.8	-
Head length (HL)	12	21.4–24.1	22.6	0.9	22	17.5–23.7	22.4	1.2	4	21.5–26.1	23.0	2.1
Toracic length	12	15.9–19.0	17.6	1.1	22	13.7–19.1	17.5	1.4	4	12.9–16.6	15.1	1.6
Abdominal length	12	12.4–16.0	14.4	0.9	22	11.5–15.7	14.9	0.9	4	13.6–14.5	13.9	0.4
Cleithral width	12	19.7–23.3	21.7	1.0	22	17.4–23.7	21.6	1.3	4	15.8–19.3	17.6	1.5
Body height	12	9.7–14.1	11.9	1.3	22	10.0–15.2	12.7	1.2	4	7.4–10.1	8.9	1.2
Caudal peduncle height	12	1.4–2.1	1.9	0.2	22	1.5–2.2	1.9	0.1	4	1.0–2.2	1.8	0.6
Percentages of HL
Head width			96.0				96.4		4	70.3–79.8	73.9	4.1
Snout length	12	51.4–55.9	53.6	1.6	22	51.0–56.1	52.8	1.5	4	48.3–57.6	54.0	4.3
Head height	12	38.2–54.6	46.3	5.3	22	43.0–60.4	49.0	4.2	4	31.4–38	34.2	3.2
Interorbital width	12	18.9–22.3	20.0	1.0	22	18.2–22.0	19.5	1.0	4	13.7–18.6	16.3	2.2
Eye diameter	12	7.5–9.8	8.6	0.7	22	9.0–12.0	10.3	0.8	4	5.9–9.2	7.1	1.5
Maximum orbital diameter	12	11.1–14.2	13.0	0.9	22	11.6–16.4	14.0	1.4	4	7.8–12.5	10.2	2.0
Rostral edge	12	5.1–7.2	5.9	0.6	22	2.4–7.4	4.6	1.2	4	5.9–11.3	8.9	2.3