Morphometric variation of the Herichthys bartoni (Bean, 1892) species group (Teleostei: Cichlidae): How many species comprise H. labridens (Pellegrin, 1903)? Author Mejía, Omar Author Pérez-Miranda, Fabián Author León-Romero, Yatzil Author Soto-Galera, Eduardo Author Luna, Efraín de text Neotropical Ichthyology 2015 2015-03-31 13 1 61 76 http://dx.doi.org/10.1590/1982-0224-20140067 journal article 10.1590/1982-0224-20140067 1982-0224 12718408 Herichthys bartoni (Bean, 1892) Acara bartoni Bean, 1892: 286-287 [original description]. Cichlasoma bartoni . -Meek, 1904: 211-212 [description]. - Miller, 1976 20 [citation]. -Taylor & Miller, 1983: 1-15 [citation]. - Miller et al ., 2005: 299 [catalog]. Cichlosoma bartoni . - Regan, 1905: 445 [citation]. Herichthys bartoni . -León-Romero et al ., 2012: 1021-1026 [phylogenetic analysis]. -De la Maza-Benignos & Lozano-Vilano, 2013: 119-120 [description]. Nosferatu bartoni . -De la Maza-Benignos et al ., 2014: in press [citation]. Fig. 4. Canonical variance analysis derived from the discriminant function analysis of the species included in the Herichthys bartoni species group. A) Meristic data B) Morphometric data adjusted by the method of Mossimann C) Morphometric data adjusted as proportions. Symbology: Blue: H. bartoni , Red : H. cf. labridens , Green : H. labridens , Violet : H. molango , Black : H. pame , Gray : H. pantostictus , Brown : H. steindachneri . Table 1. Matrix of classification for the seven species of the Herichthys bartoni species group derived from the Discriminant Function Analysis (DFA).The data are presented as percents of correct classification for each data set. Diagnosis. Herichthys bartoni can be distinguished from the rest of the species included in the H. labridens species group by a black-and-white to light gray coloration in live adult specimens.

Species	Meristic	Mossimann	Proportions
H. bartoni	92,1053	86,8421	87,1795
H. cf. labridens	92,8571	93,8111	93,8312
H. labridens	20,5480	64,3836	65,7534
H. molango	0,0000	0,0000	39,1304
H. pame	0,0000	4,7619	0,0000
H. pantostictum	30,2326	67,4419	81,3954
H. steindachneri	50,0000	29,6296	46,6667
Total	67,5183	79,1423	80,8429

Description. Morphometric and meristic data are summarized in Tables 3-4. Color in life. Body white to light gray, with a series of blotches that extend from the opercle to the basis of the caudal fin. Dots in the head absent, with a red to purple axil mark at the pectoral fins. Color in alcohol. Body dark brown to dark gray with black blotches, fins turn yellow to light brown. Distribution. Laguna de la Media Luna and río Verde. Fig. 5. Canonical variance analysis derived from the geometric morphometric analysis of the species included in the Herichthys bartoni species group. A) canonical variate 1 and 2 for the head, B) canonical variate 2 and 3 for the head, C) canonical variate 1 and 2 for the body, D) canonical variate 2 and 3 for the body. Symbology: Blue: H. bartoni , Red : H. cf. labridens , Green : H. labridens , Violet : H. molango , Black : H. pame , Gray : H. pantostictus , Brown : H. steindachneri . Remarks . Herichthys bartoni was described originally by Bean (1892) as Acara bartoni with four specimens from Hauzteca Potosina (= Huasteca Potosina). Bean states that the height of the body is contained 2.3 times in the standard length, the eye diameter is contained 4.5 to 5.5 times in the length of the head and twice in the length of the snout, the intraocular distance is 66% of the snout length and the length of the upper maxilla is 40% of the head length. These proportions are similar to those found in this study (2.2 to 2.7 times the height of the body, 3.1 to 5.1 and 0.81 to 2.0 for the eye diameter and 63% to 127% for the intraocular distance). The only exception was the 12% to 28% of the upper maxilla compared with the head length; in fact, none of the specimens reviewed in this study reached such proportions (the highest value was for one specimen of H. molango 35%), so we think that the Bean (1892) measurement was taken to the end of the maxillary bone and not to the joint with the lower maxilla, as we measured. Nevertheless, at least one of the specimens reviewed by Bean (1892) corresponded to a different species. Bean states that “In a specimen about 5 inches the cheeks and snout are profusely covered with minute roundish brown dots”, a character present in other species of the group but not in H. bartoni . The same situation seems to be true for the material described by Meek (1904). As noted by De la Maza-Benignos & Lozano-Vilano (2013) and Meek (1904) states that the sides of the head are covered with small dark dots but that in the eight specimens reviewed by Meek (1904), the number of anal spines was V, a trait observed in only 15% of the specimens of H. bartoni reviewed in this study. It is thus likely that the material reviewed by Bean (1892) and Meek (1904) could correspond to other species distributed in the Huasteca Potosina, such as H. pame or H. steindachneri , but not to H. labridens because the latter species lacks the dots on the head that occur on H. bartoni . Material examined. Mexico : [Laguna de la Media Luna, SLP ] ENCB-P P3880 (n=19) 57.6 to 111. 6 mm SL; [Manantial los Anteojos, Río Verde, SLP ] ENCB-P P6108 (n=20) 54.0 to 118. 8 mm SL.