Systematics of Lamontichthys Miranda-Ribeiro (Siluriformes: Loricariidae), with the description of two new species Author Paixão, Andrea de Carvalho Departamento de Zoologia, Instituto de Biociências, Universidade de São Paulo. Caixa Postal 11461, 05422 - 970 São Paulo, SP, Brazil andreapaixao@usp.br Author Toledo-Piza, Mônica Departamento de Zoologia, Instituto de Biociências, Universidade de São Paulo. Caixa Postal 11461, 05422 - 970 São Paulo, SP, Brazil mtpiza@usp.br text Neotropical Ichthyology 2009 2009-12-18 7 4 519 568 https://doi.org/10.1590/s1679-62252009000400002 journal article 313264 10.1590/s1679-62252009000400002 9b33913b-ff1a-4027-a4c8-62c3b154a751 1982-0224 17751374

Table 1. Morphometric and meristic data for Lamontichthys avacanoeiro and L. filamentosus. SD = standard deviation. Range of L. avacanoeiro includes paratypes.

Variable	L. avacanoeiro					L. filamentosus
	Holotype	N	Range Mean		SD	N	Range Mean		SD
Standard length (mm)	150.5	24	47.6-159.9	108.1		64	38.8-172.5	134.9
Percents of standard length
Head length	20.9	24	19.8-25.3	22.3	1.5	64	16.0-20.2	17.6	0.9
Predorsal length	29.9	24	28.4-33.0	30.5	1.2	64	26.0-30.8	27.7	0.9
Postanal length	49.9	24	47.7-52.7	50.0	1.3	64	51.3-57.3	55.1	1.0
Abdominal lenght	16.9	24	15.2-17.7	16.7	0.7	64	13.6-16.8	15.4	0.6
Thoracic length	16.9	24	13.7-16.9	15.2	0.9	64	13.6-16.7	15.2	0.7
Dorsal-fin length	-	21	20.5-26.0	24.1	1.3	57	27.8-39.9	36.0	2.3
Pectoral-fin length	19.3	24	18.2-22.0	20.1	0.8	62	20.5-26.1	23.4	1.3
Pelvic-fin length	17.7	24	17.7-20.6	19.2	0.8	64	18.9-23.0	20.7	1.0
Anal-fin length	17.3	22	16.9-20.3	19.1	1.0	56	19.9-26.9	23.3	1.4
Body depth at dorsal-fin origin	11.8	23	9.3-12.5	10.6	1.1	64	10.2-13.9	12.5	0.8
Caudal peduncle depth	1.5	24	1.3-1.8	1.5	0.1	64	1.4-1.9	1.6	0.1
Body width at dorsal-fin origin	16.6	24	13.5-16.9	15.4	0.9	64	13.8-16.9	15.6	0.7
Body width at anal-fin origin	12.9	23	10.2-13.1	12.0	0.8	64	11.2-14.4	13.1	0.6
Body width at caudal-fin origin	2.7	23	2.4-2.9	2.7	0.2	64	2.5-3.3	2.9	0.2
Percents of head length
Head width	97.7	23	85.6-100.9	92.8	3.9	64	96.7-111.1	105.2	3.7
Interorbital distance	27.3	24	25.4-29.4	27.1	1.2	64	28.4-35.2	32.1	1.6
Orbital diameter	13.8	24	13.6-16.2	14.6	0.8	64	10.9-18.4	16.4	1.2
Snout length	62.2	24	60.6-64.8	62.7	1.1	64	55.4-63.3	59.8	1.4
Dentary length	20.8	24	18.4-23.4	20.8	1.5	64	11.5-20.2	14.1	1.4
Lower lip width	14.8	22	13.0-21.2	16.0	2.3	64	7.6-16.7	12.2	1.9
Meristic data
Lateral plates of median series	32	23	31-34	32.6	0.8	64	32-34	32.8	0.5
Lateral plates of mid-ventral series	19	24	14-20	17.7	1.5	63	14-18	14.8	0.8
Ventrolateral thoracic plates	7	24	6-9	7.0	0.8	63	5-8	6.9	0.7
Premaxillary teeth	96	21	60-100	82.8	10.7	61	33-78	62.5	8.4
Dentary teeth	83	21	50-87	73.4	9.4	60	30-70	55.1	7.8
Dorsal-fin rays	II,7	22	II,7	II,7	0.0	62	II,6-7	I,7	0.1
Pectoral-fin rays	I,7	22	I,7	I,7	0.0	64	I,7	I,7	0.0
Pelvic-fin rays	i,5	22	i,5	i,5	0.0	64	i,5	i,5	0.0
Anal-fin rays	i,5	22	i,5	i,5	0.0	64	i,5	i,5	0.0
Caudal-fin rays	i,12,i	22	i,12,i	i,12,i	0.0	61	i,12,i	i,12,i	0.0