Oligoxystre, Vellard, 1924

Bertani, Rogerio, Santos, Thiago & Righi, Alexandre, 2009, A new species of Oligoxystre Vellard 1924 (Araneae, Theraphosidae) from Brazil, ZooKeys 5 (5), pp. 41-51: 43-44

publication ID

http://doi.org/ 10.3897/zookeys.5.83

publication LSID

lsid:zoobank.org:pub:4B010318-9317-4B6B-9958-F633BC2E7FB5

DOI

http://doi.org/10.5281/zenodo.3792582

persistent identifier

http://treatment.plazi.org/id/9B5A87C8-FFCB-6957-FF01-FF361D2EA9DE

treatment provided by

Plazi

scientific name

Oligoxystre
status

 

Identification key for Oligoxystre  .

Modified from Guadanucci (2007). Female of Oligoxystre auratum  is undescribed.

Males

1 Male palpal bulb embolus with small subapical keel ( Guadanucci 2007: Figs 2-5View Figs 1-6, 26-28) .................................................................................................2

– Embolus without keel ( Figs 1-3View Figs 1-6; Guadanucci 2007: Figs 22-23, 31-32, 35- 36).............................................................................................................. 3

2 Embolus long and thin, slightly bent distally ( Guadanucci 2007: Figs 26- 28)...................................................................................... O. dominguense 

– Embolus short, strongly bent medially ( Guadanucci 2007: Figs 2-5View Figs 1-6) ........ O. bolivianum 

3 Bulb twisted on itself, prolonged by long collar, depressed at base and thin apical end, curved ( Vellard 1924: 152, pl. 10 Fig. 38)................ O. auratum 

– Bulb not as above........................................................................................4

4 Embolus more than 3 times longer than tegulum ( Guadanucci 2007: Figs 22-23); spiders with cephalothorax and abdomen dark ventrally; white setae over dorsal region of cephalothorax ( Guadanucci 2007: Fig. 38) O. caatinga 

– Embolus less than 2.5 times tegulum length ( Figs 1-3View Figs 1-6, Guadannuci 2007: Figs 31-23, 35-36); spiders with coloration on ventral portion browish or yellowish; without white setae on body.......................................................5

5 Leg I tibial spur positioned in a perpendicular angle in relation to the tibia axis ( Figs 4-5View Figs 1-6); spiders with carapace, chelicerae, abdomen and legs covered dorsally and ventrally with metallic blue setae ( Fig. 7View Figs 7-8)................................... ............................................................................. O. diamantinensis  sp. n.

– Leg I tibial spur with branches positioned in an inclined angle in relation to the tibia axis ( Guadanucci 2007: Figs 30, 34); spiders with carapace and legs browish or reddish ...................................................................................... 6

6 Embolus slightly bent distally ( Guadanucci 2007: Figs 31 32); carapace and legs brown ............................................................................ O. tucuruiense 

– Embolus slightly curved distally ( Guadanucci 2007: Figs 35-36); carapace and basal portion of legs reddish and distal portions of legs dark ( Guadanucci 2007: Fig. 39)........................................................................... O. rufoniger 

Females

1 Spermatheca receptacula as long as wide ( Guadanucci 2007: Fig. 6View Figs 1-6) ............. ............................................................................................. O. bolivianum 

– Spermatheca receptacula longer than wide ( Figs 6View Figs 1-6; Guadanucci 2007: Figs 24, 29, 33, 37)............................................................................................ 2

2 Spermatheca receptacula without lateral lobes ( Figs 6View Figs 1-6; Guadanucci 2007: Figs 24, 29)........................................................................................................3

– Spermathecae receptacula with at least one lateral lobe ( Guadanucci 2007: Figs 29, 33, 37)...........................................................................................4

3 Spermatheca receptacula long, with small apical lobes of roughtly the same size ( Guadanucci 2007: Fig. 24); white setae over dorsal region of cephalothorax, ventral cephalothorax and abdomen very dark ................ O. caatinga 

– Spermatheca receptacula with a large lobe surrounded by other smaller lobes ( Fig. 6View Figs 1-6); spiders with carapace, chelicerae, abdomen and legs covered dorsally and ventrally with metallic blue setae ( Fig. 8View Figs 7-8) ....... O. diamantinensis  sp. n.

4 Spermatheca receptacula very long and thin, with small lobes over entire length ( Guadanucci 2007: Fig. 29) ..................................... O. dominguense 

– Spermatheca receptacula long, with wide base, bearing lateral lobe towards outside ( Guadanucci 2007: Figs 33, 37) ..................................................... 5

5 Lateral lobe bifurcated (or partly bifurcated) ( Guadanucci 2007: Fig. 33); carapace and legs brown........................................................ O. tucuruiense 

– Lateral lobe not bifurcated ( Guadanucci 2007: Fig. 37); carapace and basal region of legs reddish, apical region of legs dark ........................ O. rufoniger