Short Description
Diagnosis afterLoboda, 2026 [35912]: Paratrygonlucindai is distinguished from congeners by the following combination of characters: dorsal disc coloration varying from gray and dark gray to brown, dark brown and reddish brown and characterized by the presence of largeround spots of beige, gray, brown, dark brown or reddish brown color throughout the disc, two to three times the diameter of the spiracle (vs. P. aiereba, P. orinocensis, P. parvaspina with gray or light brown dorsal coloration possessing detached small dark spots; P. munduruku, P. raonii with dark coloration having dark spots in vermicular or dendritic format; P. araguaia with brown dorsal coloration containing small brown, light brown or beige spots); spiracles small and rounded, mean spiracle length 4.4% DW [2.8–6.4% DW] with small and globular spiracular process (vs. P. aiereba, P. parvaspina, P. munduruku, P. raonii with quadrangular spiracles; P. orinocensis with triangular spiracles; P. araguaia, which also has small and rounded spiracles, although with an average spiracle length in 5.3% DW [4.3–6.1% DW], and a reduced and straight spiracular process); dermal denticles on the central disc with small, narrow and slightly higher crowns with a well developed central coronal plate of quadrangular shape, surrounded by three to six smaller and conical lateral coronal ridges (vs. P. aiereba, P. parvaspina, P. munduruku with dermal denticles on the central disc with narrow and high crowns with a pointed central coronal plate surrounded by three to six smaller and pointed or rounded lateral coronal ridges; P. raonii with dermal denticles on central disc presenting narrow and high crowns with central coronal plate pointed surrounded by six or eight lateral coronal ridges smaller and similar in shape to the central coronal plate; P. orinocensis with dermal denticles on the central disc possessing wide and high crowns with a central coronal plate pointed surrounded by twelve or more lateral coronal ridges similar in size and shape to the central coronal plate; P. araguaia with dermal denticles on the central disc possessing narrow and not so high crowns with a very reduced and pointed central coronal plate surrounded by three to five larger and rounded lateral coronal ridges); junction of four canals with the anterior end positioned more externally than the posterior end, with infraorbital and supraorbital canals connected at the anterior end, and hyomandibular and nasal canals connected at the posterior end (vs. all other Paratrygon species have the posterior end of the junction of the four canals positioned more externally than the anterior, with the anterior junction formed by the junction of the nasal and supraorbital canals, while the posterior junction is formed by the junction of the hyomandibular and infraorbital canals); posterior end of the frontoparietal component of the fontanelle straight to slightly oval (vs. P. orinocensis with posterior end of frontoparietal component of fontanelle oval; P. munduruku with posterior end of frontoparietal component of fontanelle oval to slightly rounded; P. aiereba, P. parvaspina, P. araguaia and P. raonii with posterior end of frontoparietal component of fontanelle rounded).

Distribution
Tocantins River, occurring in its upper and middle portions, including its tributaries as the Paranã River [35912]

Size / Weight / Age
951 mm TL (max), 845 mm DL(max), 801 mm DW(max) [35912]

Habitat
freshwater [35912]

Dentition
Teeth triangular, arranged in quincunx in both jaws, without size difference between central and lateral rows. Adult and subadult specimens with more developed cusps, mainly in males; juveniles without cusps (Fig. 6). Tooth rows 16–19/13–15, subadults with higher number of rows than juveniles (Tab. 2). [35912]

Remarks
shark-references Species-ID=17809