The West African slender-snouted crocodile (''Mecistops cataphractus''), or slender-snouted crocodile, is a critically endangered species of African

crocodile Crocodiles (family (biology), family Crocodylidae) or true crocodiles are large semiaquatic reptiles that live throughout the tropics in Africa, Asia, the Americas and Australia. The term crocodile is sometimes used even more loosely to inclu ...

. It is one of five species of crocodile in Africa, the other four being the Central African slender-snouted,

Nile The Nile, , Bohairic , lg, Kiira , Nobiin language, Nobiin: Áman Dawū is a major north-flowing river in northeastern Africa. It flows into the Mediterranean Sea. The Nile is the longest river in Africa and has historically been considered ...

West African West Africa or Western Africa is the westernmost region of Africa. The United Nations defines Western Africa as the 16 countries of Benin, Burkina Faso, Cape Verde, The Gambia, Ghana, Guinea, Guinea-Bissau, Ivory Coast, Liberia, Mali, Ma ...

and dwarf crocodiles. The slender-snouted crocodile (''M. cataphractus'') was thought to be distributed across west Africa and into central Africa but the central African species has been separated as the Central African slender-snouted crocodile (''M. leptorhynchus'') based on studies in 2014 and 2018 that indicated that both were distinct species. The name ''cataphractus'' is retained for the West African species as that species was described first based on specimens from western Africa. The two species diverged about 6.5–7.5 mya, living in different river drainage zones that were geographically separated from each other by the Cameroon Line.

Etymology

The

genus name Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclat ...

''Mecistops'' is most probably derived from the

Ancient Greek Ancient Greek includes the forms of the Greek language used in ancient Greece and the ancient world from around 1500 BC to 300 BC. It is often roughly divided into the following periods: Mycenaean Greek (), Dark Ages (), the Archaic peri ...

words μήκιστ (''mēkist'') meaning "longest" and ὄψις (ópsis) meaning "aspect" or "appearance". The

species name In taxonomy, binomial nomenclature ("two-term naming system"), also called nomenclature ("two-name naming system") or binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, bot ...

''cataphractus'' is thought to be derived from the

Greek Greek may refer to: Greece Anything of, from, or related to Greece, a country in Southern Europe: *Greeks, an ethnic group. *Greek language, a branch of the Indo-European language family. **Proto-Greek language, the assumed last common ancestor ...

word κατάφρακτος (''katáphraktos'') meaning "armoured" or "shielded".

Description

As with its relative, the West African slender-snouted crocodile has a very long, slender snout that it uses to catch fish and small aquatic invertebrates. As with all crocodilians, larger animals may feed opportunistically on larger prey if it becomes available. They are relatively medium-sized. Three mature adults measured in total length from and weighed from . Large males can reportedly grow up to in length. They prefer to live in dense, vegetated bodies of water.

Status

This species is relatively poorly known with few studies of the wild populations. Consequently, it was rated as

Data Deficient A data deficient (DD) species is one which has been categorized by the International Union for Conservation of Nature (IUCN) as offering insufficient information for a proper assessment of conservation status to be made. This does not necessaril ...

by the

IUCN The International Union for Conservation of Nature (IUCN; officially International Union for Conservation of Nature and Natural Resources) is an international organization working in the field of nature conservation and sustainable use of natu ...

in 1996. Following a review in 2014, it was moved to Critically Endangered, although this includes both the Central African and West African species. It appears to have been entirely

extirpated Local extinction, also known as extirpation, refers to a species (or other taxon) of plant or animal that ceases to exist in a chosen geographic area of study, though it still exists elsewhere. Local extinctions are contrasted with global extinct ...

from several countries where formerly present and declined elsewhere. In its native range, it is extremely rare and on the verge of disappearing. A study in 2015 that included 24 captive slender-snouted crocodiles in six US zoos (more than 50% of the slender-snouted crocodiles in

AZA Aza or AZA may refer to: Places *Aza, Azerbaijan, a village and municipality *Azadkənd, Nakhchivan or Lower Aza, Azerbaijan *Aza, medieval name of Haza, Province of Burgos, Spain *Aźa, a Tibetan name for the Tuyuhun kingdom *Aza, a Hebrew roman ...

zoos) found that all were of West African origin, indicating that captive breeding may be important for conservation of this species.

Distribution

West African slender-snouted crocodile occurs widely in

West Africa West Africa or Western Africa is the westernmost region of Africa. The United Nations defines Western Africa as the 16 countries of Benin, Burkina Faso, Cape Verde, The Gambia, Ghana, Guinea, Guinea-Bissau, Ivory Coast, Liberia, Mali, Maurit ...

(Benin, Burkina Faso, southern Senegal, Gambia, Ghana, Guinea, Guinea-Bissau, Ivory Coast, Liberia, southern Mali, Nigeria, Sierra Leone, and Togo) and extends into Cameroon in

Central Africa Central Africa is a subregion of the African continent comprising various countries according to different definitions. Angola, Burundi, the Central African Republic, Chad, the Democratic Republic of the Congo, the Republic of the Congo, ...

References

{{Taxonbar, from=Q268501 Crocodylidae crocodile, Slender-snouted crocodile, Slender-snouted Reptiles of Cameroon Reptiles of West Africa Reptiles described in 1825 Taxa named by Georges Cuvier