Gymnotus carapo subsp. carapo Albert 2017, New Subspecies

Gymnotus carapo carapo New Subspecies

Figure 3 C, Tables 3 and 4

Syntypes: NRM 64 (1), 262 mm; NRM 8224 (1), 331 mm; UUZM Linn. coll. 56 (1), 293 mm. Collected in the first half of the 18th Century near Paramaribo, Suriname (Lönnberg 1896:23; Fernholm & Wheeler 1983:216–217; Wheeler 1991:162–163, fig. 6).

Non-Types: MCZ 31219 (1), 262 mm, Suriname (exact locality unknown). UMMZ 190414, 260 mm, Suriname, Brokopondo, Suriname River, Tapeoeripa creek near Brokopondo village (05°04’N, 054°58’W). UMMZ 190414 (5), 71–214 mm, Suriname, Brokopondo, Suriname River, Tapeoeripa creek near. Brokopondo village (05°04’N, 054°58’W). USNM 225274 (8), 81–318 mm, Suriname, Nickerie, Lucie River, upstream of Amotopo-Camp Geologie Rd. (03°36’N, 57°37’W). USNM 225275 (11), 81–270 mm, Suriname, Nickerie, Corantijn River, 350 m downstream from Wilhelm II falls (03°34’N, 057°15’W). USNM 225276 (16), 75–148 mm, Suriname, Nickerie, Corantijn River, Dalbana Creek, ca. 3 km upstream from Amotopo–Camp Geologie Rd. (04°20’N, 057°37’W). USNM 225284 (10), 54–143 mm, Suriname, Nickerie, Corantijn River, Lana Creek, ca. 4 km from intersection with W. Corantijn River (05°28’N, 057°15’W). USNM 225285 (12), 85–257 mm, Suriname, Nickerie, Corantijn River, creek south of Matapi, approx. 2 km downstream of Cow Falls (04°59’N, 057°38’W). USNM 225286 (15), 80–319 mm, Suriname, Nickerie, Corantijn River, Koekwie creek (05°31’N, 057°10’W). USNM 225290 (19), 14–157 mm, Suriname, Nickerie, Corantijn River, Dalibane Creek, Camp Dacclemmen (05°34’N, 057°11’W). USNM 225297 (14), 53–137 mm, Suriname, Nickerie, Corantijn River, stream on S. side Lucie River (03°35’N, 057°39’W). UF 180165 (6), 185–337 mm, Suriname, Para, Kola Kreek aff. Para River (05°27’8.820”N, 055°14’42.060”W). UF 180169 (5), 182–340 mm, Suriname, Brokopondo, Marshall Kreek, aff. Suriname River (05°14’24.9”N, 055°05’58.6”W). UF 180173 (11), 34–72 mm; UF 180175 (2), 65–219 mm, Suriname, Marowijne, Cottica Rivier, aff. Commewijne River (05°35.21’N, 054°17.11’W).

Description: Specimens of G. carapo from Suriname overlap substantially in morphometric and meristic PCspace with specimens from other localities (Figures 4, 5, and 12). Gymnotus carapo carapo is characterized by the following combination of statistically significant (p <0.01) traits when compared to the rest of the species as a whole (see Principal Components Analyses and t-tests): long preorbital distance (PR 31.4%–40.2% HL, mean 36.3% vs. 28.0%–39.4%, mean 34.6% in all other subspecies) and wide mouth (MW 33.6%–47.6% HL, mean 43.0% vs. 32.2%–49.0%, mean 40.2% in all other subspecies).

Distribution: Known from Atlantic coastal drainages of Suriname and French Guiana, including the Brokopondo, Nickerie, and Suriname districts of Suriname in the Lucie, Suriname, and Corantijn rivers, and all departments of French Guiana (Figure 2 B).

Etymology: Subspecific epithet derived from the specific epithet.