The genus Peckoltia with the description of two new species and a reanalysis of the phylogeny of the genera of the Hypostominae (Siluriformes: Loricariidae) Author Armbruster, Jonathan W. text Zootaxa 2008 2008-07-14 1822 1 1 76 https://biotaxa.org/Zootaxa/article/view/zootaxa.1822.1.1 journal article 10.11646/zootaxa.1822.1.1 1175­5334 5125219 Peckoltia cavatica Armbruster and Werneke 2005 ( Figs. 2d and 13 ) Peckoltia cavatica Armbruster & Werneke, 2005: 8 , figs. 2 (bottom), 4. Type locality: Guyana , Rupununi (Region 9), 3.7 km SSE Massara , 03.86228º, –059.28439º. Holotype : UG/ CSBD 11043 . Material Examined: All collections GUYANA , Region 9 (Upper Takutu- Upper Essequibo), Essequibo River drainage: ANSP 180209 , 3 , Paratypes , 29.8–58.2, AUM 35536, 5 , 2 cs, Paratypes , 32.8–71.8 mm SL, and UG / CSBD 11045 , Paratypes , 2, 33.1–55.1 mm SL, Guyana , Rupununi ( Region 9), Rupununi River , 4.6 km NW Massara , 03°55’34”N , 059°16’49”W , 26 October 2002 , col. by J.W. Armbruster , M.H. Sabaj , D.C. Werneke , C.L. Allison , M . R . Thomas, C.J . Chin , D. Arjoon , S.M. James , and S. Mario ; ANSP 180210 , 3 , Paratypes , 28.4–52.8 mm SL, AUM 36229, 6 , 4 cs, Paratypes , 27.5–58.2, UG / CSBD 11043 , 1 , Holotype , 71.8 mm SL, and UG / CSBD 11044 , 3 , Paratypes , 32.3–43.4 mm SL, 3.7 km SSE Massara , 03°51’44”N , 059°17’04”W , 27 October 2002 , col. by J.W. Armbruster , M.H. Sabaj , D.C. Werneke , C.L. Allison , M . R . Thomas, C.J . Chin , D. Arjoon , S. MaRio , and S.M. James ; AUM 44812, Rupununi River at Yukupari , 03°39’54”N , 059°20’38”W , col. by L.S. de Souza , N.K. Lujan , D.C. Taphorn , J.A. Hartsell , E. Liverpool , and S. Lord ; USNM 372572 , 1 , Paratype , 70.0 mm SL, Guyana , Rupununi ( Region 9), Rupununi River , rock area near Massara , 23 November 2001 , col. by D. Arjoon . FIGURE 13. Dorsal, lateral, and ventral views of the holotype of Peckoltia cavatica UG /CSBD 11043, 71.8 mm SL. Photographs by D. C. Werneke. TABLE 3. Selected morphometrics of Peckoltia cavatica and P.furcata . Numbers in parentheses refer to landmark numbers in Armbruster (2003). Measurements are ratios of SL (predorsal l. to pelvic-dorsal l.) or head l. (head-eye l. to premaxillary tooth cup l.).

P. cavatica		P. furcata
N	Avg.	SD	Min.	Max.	N	Avg.	SD	Min.	Max.
SL (1-20)	25	50.3	12.1	35.8	71.8	12	106.5	25.9	75.9	153.5
Predorsal L. (1-10)	25	45.3	1.0	43.4	46.6	12	41.6	1.7	38.3	44.6
Head L. (1-7)	25	39.8	1.6	37.6	46.2	12	33.2	1.7	30.4	35.9
Head-dorsal L. (7-10)	25	6.2	1.0	3.9	7.6	12	8.6	1.4	6.3	11.1
Cleithral W. (8-9)	25	30.5	1.1	28.1	32.3	12	24.8	2.4	20.8	28.3
Head-pectoral L. (1-12)	25	28.3	1.3	25.1	31.4	12	24.2	1.0	22.5	26.2
Thorax L. (12-13)	25	23.6	1.3	20.7	26.2	12	23.9	2.3	21.1	29.1
Pectoral-spine L. (12-29)	25	31.9	1.9	27.0	34.5	12	29.8	2.7	26.0	34.7
Abdominal L. (13-14)	25	21.9	1.7	17.8	24.6	12	22.3	1.2	20.7	24.0
Pelvic-spine L. (13-30)	25	27.0	1.1	24.1	29.0	12	27.6	1.9	24.5	30.7
Postanal L. (14-15)	25	34.4	1.4	31.3	36.9	12	35.2	2.2	32.2	39.5
Anal-fin spine L. (14-31)	25	12.7	1.2	9.5	14.6	12	15.7	1.5	13.1	18.3
Dorsal-pectoral D. (10-12)	25	30.8	1.0	28.2	32.4	12	27.5	1.3	25.8	29.6
Dorsal spine L. (10-11)	25	33.4	3.6	23.0	38.5	11	36.3	3.5	30.6	39.9
Dorsal-pelvic D. (10-13)	25	23.8	2.4	18.6	29.8	12	23.1	1.8	19.9	26.6
Dorsal-fin base L. (10-16)	25	27.1	1.7	23.7	30.7	12	28.2	0.6	27.0	29.1
Dorsal-adipose D. (16-17)	25	12.4	1.3	10.1	14.9	12	14.8	1.8	12.6	17.6
Adipose-spine L. (17-18)	25	10.9	1.0	9.0	12.5	12	10.0	1.5	7.6	12.7
Adipose-up. caudal D. (17-19)	25	20.4	1.5	17.5	22.5	12	18.6	1.9	15.8	22.8
Caudal peduncle Dp. (15-19)	25	10.4	1.5	7.9	13.5	12	10.6	1.6	7.6	12.6
Adipose-low. caudal D. (15-17)	25	26.4	1.2	24.6	28.5	12	23.8	2.1	20.8	28.4
Adipose-anal D. (14-17)	25	16.2	1.3	13.7	19.0	12	18.9	1.1	17.7	21.4
Dorsal-anal D. (14-16)	25	16.4	1.1	13.7	18.3	12	16.4	0.8	15.2	17.4
Pelvic-dorsal D. (13-16)	25	24.4	2.5	18.9	28.5	12	27.4	2.1	24.1	30.0
Head-eye L. (5-7)	25	36.1	2.3	32.5	42.0	12	36.4	1.6	33.3	38.7
Orbit Dia. (4-5)	25	22.2	0.8	20.5	23.7	12	17.4	1.9	14.5	21.1
Snout L. (1-4)	25	55.3	3.6	45.7	60.4	12	59.1	2.4	55.4	63.1
Internares W. (2-3)	25	16.6	2.7	12.0	20.8	12	12.8	0.9	11.5	14.3
Interorbital W. (5-6)	25	39.7	2.6	31.7	43.1	12	38.8	3.1	32.3	43.2
Head Dp. (7-12)	25	68.8	2.4	61.8	71.8	12	68.7	1.4	66.6	72.1
Mouth L. (1-24)	25	43.0	2.8	38.2	50.6	12	40.1	4.6	30.6	46.2
Mouth W. (21-22)	25	40.5	3.0	34.1	45.5	12	40.9	5.5	32.8	50.0
Maxillary barbel L. (22-23)	25	15.0	2.4	10.5	18.4	12	13.4	2.4	9.9	16.7
Dentary tooth cup L. (25-26)	25	8.3	1.6	5.4	11.4	12	12.8	2.1	8.9	16.3
Premax. tooth cup L. (27-28)	25	7.9	1.2	5.5	10.5	12	13.2	1.6	10.5	15.8

Diagnosis : Peckoltia cavatica can be identified from all other described Peckoltia except P. braueri by the presence of an orange band in the dorsal fin and by having thin, black lines that outline the plates and bones of the head. Peckoltia cavatica can be identified from P. braueri as above The only other species of Peckoltia similar to P. cavatica in coloration are P. lineola and P. vermiculata , which can be identified by having vermiculations on the dorsal head bones and plates (vs. coloration confined to the borders between bones and plates in P. cavatica ). Description: Peckoltia cavatica was recently described by Armbruster and Werneke (2005) . Morphometrics in Table 3 . Range. Collected from two localities around the Macushi village of Massara near Anai in the Rupununi River ( Fig. 8 ).