Dendrocephalus, Daday, 1908

Rabet, Nicolas, Lacau, Sébastien & Bozelli, Reinaldo L., 2018, Richness of Dendrocephalus (Branchiopoda, Anostraca) in Brazil with the description of two new species, European Journal of Taxonomy 478, pp. 1-20 : 18

Key for all known species of Brazilian Dendrocephalus

A key based on male characters is presented for all known species of the Brazilian Dendrocephalus , and we recommend verifying the coherence of the determination with Tables 1–3.

1. Proximal anterior surface of frontal appendage primary branches without spines ........................... 2 – Proximal anterior surface of frontal appendage primary branches with at least one spine ............... 3

2. Primary branches of frontal appendage with spines on medial surface, thoracopod I with endopodite without expansion..................................................................................... D. brasiliensis Pesta, 1921

– Primary branches of frontal appendage without spines, thoracopod I with endopodite with spiny expansion ................................................................... D. carajaensis Rogers, Gomes & Vieira, 2012

3. Proximal anterior surface of frontal appendage primary branches generally with one spine and branch 2A extremity with a strongly sclerotized hook ................ D. orientalis Rabet & Thiéry, 1996

– Proximal anterior surface of frontal appendage primary branches with three to four spines and branch 2A extremity podiform ...................................................................................................................... 4

4. Branch 1V anterior sub-branch with swollen distal portion.............................................................. 5 – Branch 1V anterior sub-branch with acute distal portion.................................................................. 6

5. Branch 2D, sub-branch I and II with several long spines.............. D. aranai Rabet & Lacau sp. nov. – Branch 2D, sub-branch I and II without long spines ........................................ D. thieryi Rabet, 2006

6. Thoracopod III with endopodite producing distolateral corner........................................................... .................................................................................................... D. goiasensis Rabet & Thiéry, 1996 – Thoracopod III with endopodite not producing distolateral corner................................................... 7

7. Thoracopod I with endopodite with basolateral spiniform projection; thoracopods II and III with endopod without large spines ............................................ D. riograndensis Rogers & Volcan, 2016

– Thoracopod I with endopodite with small basolateral extension with spines; thoracopods II and III with endopod with large marginal spines ................................... D. xikrini Rabet & Bozelli sp. nov.