Table 1.

Morphometric data for Microplecostomus forestii sp. n. SD.

	Microplecostomus forestii sp. n., 15 paratypes and the holotype
	Holotype	Range	Mean	SD
SL	38.3	21.7–38.3	27.9	–
Percentage of SL
Predorsal length	45.5	44.5–50.8	47.9	1.8
Head length	34.9	34.5–39.9	37.4	1.5
Head-dorsal length	12.5	10.0–13.5	11.4	1.1
Cleithral width	32.5	31.2–35.2	33.3	1.0
Head-pectoral length	29.7	22.4–32.7	30.1	2.4
Thorax length	19.1	17.1–20.5	19.1	1.0
Pectoral-spine length	19.9	19.2–25.3	21.4	1.7
Abdominal length	21.8	19.4–24.3	21.8	1.2
Pelvic-spine length	20.8	17.0–22.3	20.3	1.6
Post-anal length	34.2	31.8–34.9	33.2	0.9
Anal-fin spine length	12.2	10.6–13.6	12.1	0.8
Dorsal-pectoral distance	25.7	25.3–34.5	28.1	2.2
Dorsal spine length	19.4	18.2–23.0	20.9	1.4
Dorsal-pelvic distance	20.2	16.8–22.3	20.1	1.6
Dorsal-fin base length	18.5	15.1–19.4	17.6	1.2
Caudal peduncle depth	9.5	8.1–10.5	9.6	0.6
Dorsal-anal distance	13.6	13.6–16.8	15.0	1.0
Pelvic-dorsal distance	22.5	20.3–25.7	23.2	1.6
Percentage of HL
Head-eye length	32.3	30.9–36.7	33.9	1.9
Orbital diameter	15.8	13.2–17.2	15.1	1.2
Snout length	61.8	52.9–61.8	57.8	2.8
Internares width	17.0	14.8–19.2	16.7	1.2
Interorbital width	31.5	28.8–34.3	32.1	1.5
Head depth	58.8	55.8–66.6	61.1	2.6
Mouth length	55.8	45.6–66.9	58.7	5.8
Barbel length	4.8	1.2–5.5	3.2	1.2
Dentary tooth cup length	24.2	20.1–27.0	23.3	1.6
Premaxillary tooth cup length	21.7	18.3–25.2	23.3	1.8