Cambarellus zacapuensis

Cambarellus zacapuensis, also known as Zacapu acocil or Zacapu dwarf crayfish, is a small crustacean endemic to the Angulo River basin, observed mainly in Zacapu Lagoon.

Cambarellus zacapuensis
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Subphylum:
Crustacea
Class:
Malacostraca
Order:
Decapoda
Infraorder:
Astacidea
Family:
Cambaridae
Genus:
Cambarellus
Binomial name
Cambarellus zacapuensis
Pedraza Lara & Doadrio, 2015

Description

The Zacapu acocil is a species morphologically very similar to the Chapala acocil (Cambarellus chapalanus). Males of C. zacapuensis have an average length of 26 millimeters, with a 12 millimeters long and 5.5 millimeters wide cephalothorax, while females have an average length of 32 millimeters, with a 14.5 millimeters long and 7 millimeters wide cephalothorax. C. zacapuensis has a pigmented body, well-developed eyes, and a rostrum with marginal spines. Its shell lacks a cervical spine or a branchial spine.[1]

Conservation status and habitat

The Zacapu acocil is found mainly in Zacapu Lagoon and in some of its drains such as the Angulo River. It is usually found at a shallow depth, between submerged roots and in the aquatic substrate.[1][2][3]

The introduction of invasive species such as common carp and grass carp pose a threat to the Cambarellus zacapuensis population, as has happened to other species of the Cambarellus genus elsewhere. The exploitation of the water resources of their habitat by human action also represents a threat to the small crustacean, which is why it could be considered endangered under IUCN criteria.[1]

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References
  1. Pedraza Lara, Carlos; Doadrio, Ignacio (28 May 2015). A new species of dwarf crayfish (Decapoda: Cambaridae) from central México, as supported by morphological and genetic evidence (PDF). Zootaxa. 3963. Auckland, Nueva Zelanda: Magnolia Press. pp. 583–594. ISSN 1175-5326. Retrieved 2 June 2020.
  2. Crandall, Keith A.; De Grave, Sammy (8 August 2017). An updated classification of the freshwater crayfishes (Decapoda: Astacidea) of the world, with a complete species list (PDF). Journal of Crustacean Biology. 37. The Crustacean Society. p. 623. doi:10.1093/jcbiol/rux070. ISSN 1937-240X. Retrieved 2 June 2020.
  3. "Cambarellus zacapuensis" (in Spanish). Naturalista.
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