From the mud to the tree: phylogeny of Austrolebias killifishes, new generic structure and description of a new species (Cyprinodontiformes: Rivulidae) Author Alonso, Felipe Instituto de Bio y Geociencias del NOA (IBIGEO), National Scientific and Technical Research Council (CONICET) - UNSa, Av. 9 de Julio 14, A 4405 BBA Rosario de Lerma, Salta, Argentina & Killifish Foundation, La Plata, Buenos Aires Province, Argentina Author Terán, Guillermo Enrique Killifish Foundation, La Plata, Buenos Aires Province, Argentina & Fundación Miguel Lillo - Unidad Ejecutora Lillo (CONICET), San Miguel de Tucumán, Tucumán, Tucuman Province, Argentina Author Alanís, Wilson Sebastián Serra Killifish Foundation, La Plata, Buenos Aires Province, Argentina & Sección Ictiología, Departamento de Zoología, Museo Nacional de Historia Natural, Montevideo, Uruguay & Centro Universitario Regional del Este (CURE) Sede Rocha, Rocha, Uruguay Author Calviño, Pablo Killifish Foundation, La Plata, Buenos Aires Province, Argentina Author Montes, Martin Miguel Killifish Foundation, La Plata, Buenos Aires Province, Argentina & Centro de Estudios Parasitológicos y de Vectores - [CCT-CONICET - La Plata] Centro Científico Tecnológico Conicet, La Plata - [Conicet] Consejo Nacional De Investigaciones Científicas y Técnicas, La Plata, Buenos Aires Province, Argentina Author García, Ignacio Daniel Killifish Foundation, La Plata, Buenos Aires Province, Argentina & Instituto de Limnología ‘ Dr. Raúl Ringuelet’ (ILPLA) - UNLP-CONICET, La Plata, Buenos Aires Province, Argentina Author Barneche, Jorge Adrián Killifish Foundation, La Plata, Buenos Aires Province, Argentina & Centro de Estudios Parasitológicos y de Vectores - [CCT-CONICET - La Plata] Centro Científico Tecnológico Conicet, La Plata - [Conicet] Consejo Nacional De Investigaciones Científicas y Técnicas, La Plata, Buenos Aires Province, Argentina Author Almirón, Adriana Universidad Nacional de La Plata, Facultad de Ciencias Naturales y Museo, División Zoología Vertebrados, La Plata, Buenos Aires Province, Argentina Author Ciotek, Liliana Administración de Parques Nacionales, Parque Nacional Campos del Tuyú (7103), General Lavalle, Buenos Aires Province, Argentina Author Giorgis, Pablo Administración de Parques Nacionales, Parque Nacional Campos del Tuyú (7103), General Lavalle, Buenos Aires Province, Argentina Author Cascioưa, Jorge Universidad Nacional de La Plata, Facultad de Ciencias Naturales y Museo, División Zoología Vertebrados, La Plata, Buenos Aires Province, Argentina text Zoological Journal of the Linnean Society 2023 2023-07-10 199 1 280 309 http://dx.doi.org/10.1093/zoolinnean/zlad032 journal article 266147 10.1093/zoolinnean/zlad032 684543f4-855c-492a-b163-a157473a187c 0024-4082 8326346 E1210342-9DBD-4D89-ABF5-1925792D0E14C

Table 2. Morphometric data for Argolebias guarani: holotype and paratypes (N = 24; range, mean and SD include the holotype).

Parameter	Holotype	Male (N = 10)			Female (N = 14)
		Range	Mean	SD	Range	Mean	SD
Total length (mm)	64.8	38.3–64.8	48.2	10	38.2–48.3	43.4	3.1
Standard length (mm)	51.0	29.9–51.0	38.5	8	30.2–37.3	34.2	2.3
Measurements as a percentage of standard length
Body depth	44.5	32.9–44.5	36.9	3.2	30.2–37.6	35.5	2.0
Caudal peduncle depth	18.4	14.4–18.4	15.6	1.3	14.0–15.8	14.8	0.6
Predorsal length	48.0	43.7–48.0	45.7	1.4	54.0–61.4	58.4	2.0
Prepelvic length	50.0	40.3–50.0	45.0	2.8	49.4–56.7	52.6	2.0
Preanal length	56.3	45.6–56.3	51.3	3.3	60.6–69.1	63.1	2.2
Length of dorsal fin base	44.7	42.5–54.4	46.5	3.3	24.8–35.0	30.3	2.9
Length of anal fin base	40.4	38.0–47.5	41.0	2.8	21.1–27.7	25.0	1.8
Caudal fin length	27.1	22.9–28.1	25.1	1.6	22.8–30.6	27.0	2.0
Pectoral fin length	21.4	18.0–25.8	21.4	2.3	19.6–26.5	21.8	1.7
Pelvic fin length	10.4	7.3–10.4	8.5	1.1	7.4–13.7	10.5	1.6
Head length	28.4	28.0–31.9	29.6	1.4	27.7–34.2	32.2	1.6
Measurements as a percentage of head length
Head depth	11.2	93.4–117.2	103.6	6.6	82.6–100.9	94.0	4.2
Head width	86.9	68.1–86.9	73.4	5.6	67.0–83.6	74.5	4.7
Snout length	15.9	9.5–18.8	15.2	4.9	9.3–17.0	14.2	2.0
Lower jaw length	31.0	20.0–31.0	24.2	3.2	15.4–25.9	20.4	2.2
Interorbital width	54.5	37.4–54.5	46.2	4.7	38.1–48.3	46.6	3.1
Eye diameter	27.6	27.2–31.6	29.4	1.7	26.6–31.4	29.3	1.4