Taxonomy of the catfish genus Pseudoplatystoma Bleeker (Siluriformes: Pimelodidae) with recognition of eight species. Author Uriel Angel Buitrago-Suárez Author Brooks M. Burr text Zootaxa 2007 1512 1 38 http://www.zoobank.org/urn:lsid:zoobank.org:pub:A7987452-69A5-4C79-B0F2-29B889EA3E1B journal article z01512p001 A7987452-69A5-4C79-B0F2-29B889EA3E1B Pseudoplatystoma magdaleniatum n. sp. (Figure 24, Table 7) Geographic distribution: Magdalena River drainage, including Cauca River, Colombia (Fig. 25). Holotype : CAS 19165 , 421.5 mm SL. Soplaviento, town on the dique de Cartagena road to Calamar, Magdalena River , department of Bolivar , Colombia , C. H. Eigenmann , 11 January 1912 . Paratypes : FMNH 56278 , (1), Calamar, Magdalena River , north of Colombia , C. H. Eigenmann , 16/ 18 January 1912 . FMNH 59324 , (1), Soplaviento, Magdalena River , north of Colombia . C. H. Eigenmann , 13 January 1912 . Material examined: CAS 15047 , (1), Apulo, Magdalena River , department of Santander , Colombia , M. Gonzales . CAS 150405 , (1), near junction of Samana and La Miel rivers, near city of La Dorada, Magdalena River , departamento of Caldas , Colombia , T. White and J. N. Reynolds , 27 February 1950 . CAS 13233 , (1), Puerto Berrio, Cienega, Magdalena River , Colombia . C. H. Eigenmann , 1913 . ICN -MHN uncatalogued (1 ds), Magdalena River , Colombia , R. Royero , 2002 . FIGURE 24. Pseudoplatystoma magdaleniatum n. sp. , holotype, CAS 19165, 421.5 mm SL. Scale 15 cm. FIGURE 25. Distribution of Pseudoplatystoma magdaleniatum (black circles), type locality indicated by a star; and P. reticulatum (black squares), type locality indicated by a cross. Diagnosis: A species of Pseudoplatystoma distinguished by a combination of the following features: rays on dorsal and ventral lobes of caudal fin with fused branches or not separated as in other species of Pseudoplatystoma ; wide, straight, dark vertical bars on sides; no loops on nape and associated areas; dorsal and ventral regions of pectoral fin pale with no spots; dorsal fin with few or no spots (sometimes 5 spots); 43 vertebrae; adipose fin with few large spots (6-7 spots); areas surrounding the procurrent rays of dorsal fin without spots; posterior region of the metapterygoid wider than in other species, forming a depression or notch in the dorsal margin of the suspensorium (Fig. 26A). Description: Maximum recorded length 1000 mm TL. Body elongate and slim. Anterior margin of head rounded. Posterior dorsal region of head rough and with distinctive grooves; supraoccipital process with a crest; median fontanel short, extending from middle length of mesethmoid to connection of frontals to supraoccipital. No rough skin on fontanel. Anterior nostrils short. Body pigmentation dark on dorsal and lateral sides with no clear delimitation between pale and dusky areas. Dark bars extending beyond the lateral line with pale bars. Bars connecting dorsally with those on the opposite side. Region posterior to dorsal fin with some median dark bars. Adipose fin with few and large spots. See Table 9 for a comparison with other species. Etymology: Named for the Magdalena River, Colombia, to which this species is endemic. FIGURE 26. A, suspensorium of P. magdaleniatum , ICN -MHN (uncatalogued). B, supsensorium of P. punctifer , ICN - MHN (uncatalogued). Arrow points to the notch in the dorsal margin of the suspensorium in P. magdaleniatum . Photo by R. Royero. TABLE 7. Descriptive measurements of the body size and shape (in mm), and number of vertebrae for P. magdaleniatum . Number of individuals measured, 7.

Variables	Holotype	mean+SD	range
Standard length	421.6	423.7+77.2	351.8-535.6
Snout -posterior occipital process	161.7	161.2+27.3	135.6-200.5
Snout -posterior margin of the opercle	156.2	157.1+29.3	130.5-200.6
Dorsal fin spine length	53	53+8.3	45.6-65.9
Pectoral fin spine length	63.9	63+8	52.3-73.1
Maxillary barbel length	202.9	193.4+41.6	146.2-250
Anterior chin barbel length	124.5	122.1+21.6	68.7-142
Insertion maxillary barbel -eye	55.1	54.8+7.8	47.1-65.4
Insertion maxillary barbel -joint pectoral spine	123.4	130.5+20.6	103-158.7
Insertion maxillary barbel -joint dorsal spine	171.7	173.5+31.6	145.6-223
Eye -joint pectoral spine	72.4	73.6+16.3	56.7-95.5
Eye -joint dorsal spine	116.5	117.1+21.7	97.4-150.6
Joint pectoral spine -joint dorsal spine	69.5	69+12.3	59.4-87.7
Joint pectoral spine -joint first pelvic ray	86.5	96.3+26.9	75-137.5
Joint pectoral spine -joint last ray of dorsal fin	92.7	92.6+18.7	77-120.9
Joint dorsal spine -joint first pelvic ray	64.6	67.9+11.5	56.5-82.7
Dorsal fin base length	37.3	36.7+ 5.7	30.9-44.8
Joint first pelvic ray -joint last dorsal fin ray	46.3	47.5+7	41.3-55.8
Joint first pelvic ray -anal fin origin	104.6	100.9+15.2	89.3-124.6
Joint first pelvic ray -origin adipose fin	102.7	104.7+18	86-134.4
Last dorsal fin ray -anal fin origin	120.7	117.4+19.3	97.2-143.2

...continued TABLE 7. (continued)

Variables	Neotype	mean+SD	range
Last dorsal fin ray-adipose fin origin	97.3	99.9+18.4	78.3-123.3
Anal fin origin-adipose fin origin	42.2	43+6.7	36.9-51.2
Anal fin base length	43.1	43.4+7.4	36.4-53.9
Anal fin origin-adipose fin terminus	50.6	51.2±8.9	41.7-63.4
Adipose fin origin-anal fin terminus	56.1	55±9.6	47.4-69.9
Adipose fin length	46.2	41.1+6.9	32.7-50
Anal fin terminus-adipose fin terminus	24.7	26.5±4.7	22.4-34.7
Anal fin terminus-ventral caudal fin origin	22.6	22±3.7	20.4-26.6
Anal fin terminus-dorsal caudal fin origin	33.8	33.7+5.7	29.3-41.5
Adipose fin terminus-ventral caudal fin origin	33.6	36.9+7.1	32.6-47.5
Adipose fin terminus-dorsal caudal fin origin	24.6	27+6	27.2-35.8
Caudal peduncle depth	23.4	24.7+4.2	21.2-30.8
Number of vertebrae	43	43+0	43