Dragonflies (Odonata) From The Sierras Of Tapirapeco And Unturan, In The Extreme South Of Venezuela
DeMarmels, Jurg
Acta Biologica Venezuelica
1992
14
1
57
78
8SZP
Selys, 1876
Selys
1876
[194,836,1031,1068]
Insecta
Coenagrionidae
Acanthagrion
Animalia
Odonata
5
62
Arthropoda
species
apicale
Figures 25-29(larva)
Material. 3♂ 1♀(reared, with exuviae), Base Camp.
Larva. Occipital lobes bulging, but not angled, beset with spines; occipital border deeply excavated. Labium ( Fig. 25) reaching to beyond first pair of coxae. Antennae seven-jointed ( Fig. 26), Hind border of pronotum with lateral angles pro· duced, but not pointed. Wing sheaths reaching to base of segment 5 ( Fig. 27). Tibiae and tarsi with scattered soft hairs. Adomen dark with a pale longitudinal dorsomedian line; posterior angles of segments 4-8 strongly marked off and beset with spinules; ovipositor slightly surpassing end of segment 10, valves beset with about four larges spines and a few very smaIl ones, in a single row ( Fig. 28). Lateral and central caudal gills of same length, sharply pointed ( Fig. 29). Measurements. Total length (excl. gills) 10.5; caudal gills 7.0; hind femur 2.5.
Remarks. The larva of A. apicalecomes closest to that of A.luteum Racenis described by Geijskes (1941) sub " A. ascendensCalvert", but specimens were not compared directly. The larva was found in a small stagnant pool in close vicinity of a sandy creek, in the forest. The pool was filled with leaf litter, had a sandy ground and clear wa· ler.. A larva of Fylgia amazonicalychnitinaDe. Marmels was found in the same pool (see below).
2433522112
1989-02-14
1989-03-06
1989-02-14
MIZA
J. DeMarmels & A. Chacon
Venezuela
160
2.036111
Base Camp and surroundings, on the upper Rio Mavaca, left bank
-65.113884
5
62
4
1
3
Amazonas