Trechalea

Thorell, 1869

Trechalea is a of semi-aquatic in the Trechaleidae, distributed from the southern United States through Central and South America to northern Argentina. The genus was established by Thorell in 1869, replacing the preoccupied name Triclaria. At least one , T. extensa, exhibits specialized diving as an antipredator tactic, using respiration to remain submerged for over 30 minutes.

Trechalea by (c) Diogo Luiz, some rights reserved (CC BY), uploaded by Diogo Luiz. Used under a CC-BY license.

Pronunciation

How to pronounce Trechalea: //trɛˈka.le.a//

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Identification

Trechalea can be distinguished from the closely related Syntrechalea by morphological characters established in taxonomic revisions; two species formerly placed in Trechalea (T. boliviensis and T. lomalinda) were transferred to Syntrechalea based on these differences. The genus is characterized by features typical of trechaleid , though specific diagnostic traits require examination of genitalic .

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Habitat

Riparian and aquatic environments in Neotropical regions; associated with water bodies where semi-aquatic foraging and diving can occur.

Distribution

Southern Arizona, USA south through Mexico, Central America, and South America to northern Argentina and Peru; includes Trinidad, Colombia, Brazil, Ecuador, Bolivia, Guyana, Suriname, Rica, and Panama.

Behavior

At least one (T. extensa) has been documented diving underwater for up to 34 minutes as an antipredator response when pursued by perceived threats; this is triggered by disturbance (prodding, pinching, chasing) but not during undisturbed activity or capture. Diving is facilitated by hydrophobic cuticular hairs that trap air to form a , potentially supporting respiratory function and reducing heat loss during submersion.

Similar Taxa

SyntrechaleaFormerly contained now transferred from Trechalea (T. boliviensis, T. lomalinda); distinguished by morphological characters including genitalic features

More Details

Etymology

The name Trechalea is derived from the Greek τρηχαλέος, meaning 'rough' or 'savage'. The original name Triclaria (Koch, 1848) was preoccupied by a of parrots.

Taxonomic History

The was revised by Carico in 1993, who redescribed eight and described two new species. Additional revisions include synonymization of T. trinidadensis and T. rothi with T. amazonica.