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1.
Zootaxa ; 4683(1): zootaxa.4683.1.3, 2019 Oct 07.
Artigo em Inglês | MEDLINE | ID: mdl-31715935

RESUMO

A detailed morphological comparison was carried out among specimens of several samples of Archaebranchinecta Rogers Coronel, 2011 from the Altiplano of Peru, Bolivia, and Argentina. Surprisingly, striking differences were found between Peruvian samples collected near the western shore of Lake Titicaca, and those from Bolivia taken southwardly, near the east coasts of River Desaguadero and Lake Poopó. Accordingly, the new species Archaebranchinecta aimara sp. nov. is described, representing the second specific entity of a genus that so far included only A. pollicifera (Harding, 1940). The main differential features between both species include: (a) size and shape of the three processes of basal segment of the male second antenna; (b) shape and protrusion degree of the pair of medioventral bulges in the male genital segments; (c) presence or absence of strong ventrolateral spine on the second genital segment of female; and (d) presence or absence of a pair of ventrolateral outgrowths in the brood pouch. This research contributes to our understanding of the biodiversity and endemism of the unique Altiplano region of South America.


Assuntos
Anostraca , Animais , Argentina , Bolívia , Feminino , Masculino , Peru , América do Sul
2.
Zootaxa ; 4531(1): 139-141, 2018 Dec 11.
Artigo em Inglês | MEDLINE | ID: mdl-30651457

RESUMO

As part of preparation for identification keys to the branchiopod crustaceans of the Neotropical Region, we re-examined many species of Anostraca that appeared to be closely related. Our examination caused us to re-evaluate the status and relationship of two branchinectid species.


Assuntos
Anostraca , Crustáceos , Animais
3.
Zootaxa ; 4088(1): 76-90, 2016 Mar 07.
Artigo em Inglês | MEDLINE | ID: mdl-27394326

RESUMO

Thamnocephalus chacosaltensis, a new species of fairy shrimp, was found in a temporary turbid pond in the Rivadavia Department, Salta province, Argentina (24º13'19.3''S; 62º 52'14.3''W), belonging to the Chaco salteño. The males present a well developed frontal appendage. Their First (FB) and Third (TB) branches show features diagnostic for the species. FB shows three sub-branches; the most proximal one is coiled, lacks spines all along, gradually thins in distal direction and flattens in the distal half; distally, the flattened portion is folded and ends blunt, bearing a small spine at the tip. TB is a broad-based triangular, thin, much flattened and folded outgrowth, with a small spine at the apex. Male genital and abdominal segments lack medio-ventral spines near their posterior margins. Comparisons with the other species of the genus are established.


Assuntos
Anostraca/classificação , Distribuição Animal , Estruturas Animais/anatomia & histologia , Estruturas Animais/crescimento & desenvolvimento , Animais , Anostraca/anatomia & histologia , Anostraca/crescimento & desenvolvimento , Argentina , Tamanho Corporal , Feminino , Masculino , Tamanho do Órgão
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