Pristimantis inguinalis Pristimantis inguinalis Pristimantis inguinalis is a species of frog in the family Craugastoridae. It is found in Guyana, Suriname, French Guiana, and northern Brazil (Amapá state). The type locality is "the New River, British Guiana", in the disputed area claimed by both Guyana and Suriname. Common names New River robber frog and New River South American rain frog have been coined for it. Adult males measure on average in snout–vent length. Specimens from French Guiana have light brown dorsal surface with large brownish black markings. The marking behind the head is W-shaped, and another is a chevron. Supralabial bars are
Geology of French Guiana the Paramaca series, which corresponds to a series of micaschists, aluminous paragneisses and black quartzites whose total thickness is about 1 km. The central granite massifs consist of granite plutons, granodiorites and quartz diorites dating from 2.05 to 2.15 billion years ago. The north of French Guiana corresponds to a synclinorium composed of the Paramaca series on which sandstone and fluviatile conglomerates lie unconformably. Shield rocks in Guyana are all dated between 1.6 and 2.5 billion years ago. The Quaternary lands are located in the northern part of Guyana, near the coast, unconformably on the Paleozoic lands. The coastal plains