Updated systematic inventory of the non-marine (land & freshwater) molluscs occurring in the tropical mainland territory of the Guaianas (British, Dutch/ Surinam & French), Northern region of South America located between Venezuela and Brazil

Abstract

Introduction: Simultaneous with the malacological studies carried about the country of Venezuela (Agudo-Padrón 2023 a-b) and their immediate insular neighbor territories of Trinidad & Tobago (Agudo-Padrón 2023 c) & the Dutch ABC (Agudo-Padrón 2023 d), additionally since 2014 the “Projeto AM” (Brazil) has carried parallel out taxonomic, bioecological and conservation research of the non-marine (land & freshwater) molluscs present in the mainland territory of the three (3) “Guianas” – including the “English/ British Guiana” (territory historically disputed, actively to this day, by “Venezuela”), the “Dutch Guiana” (better known as "Surinam"), and the “French Guiana” (border with the extreme North of “Brazil”). To date, these aspects of the natural history of this geographic region, located in the Northern sector of South America, have been regularly studied. Objective: Substantial updating of this knowledge through an exhaustive review of the regional malacological literature of historical and recent nature available. Methodology: Between 2014 and the present, a sequential review of the species occasionally referred to in the regional literature was carried out, examined from the perspective of the current taxonomy in force. Results and conclusions: Verification and determination of hundred one (101) referred taxons, including 63 land/ terrestrial (2 subspecies & 61 species) and 38 aquatic (limnic/ freshwater) forms/ species (31 gastropods & 7 bivalves), taxonomically grouped into twenty-seven (27) families and forty-four (44) genera.