Leentvaaria Demoulin, 1966

Salles, Frederico F., Dominguez, Eduardo, Mariano, Rodolfo & Paresque, Roberta, 2016, The imagos of some enigmatic members of the Hermanella complex (Ephemeroptera, Leptophlebiidae), ZooKeys 625, pp. 45-66 : 51-53

publication ID

https://dx.doi.org/10.3897/zookeys.625.9874

publication LSID

lsid:zoobank.org:pub:229DAED6-8D71-4326-94B5-84DABD3481BA

persistent identifier

https://treatment.plazi.org/id/6F051660-5B44-EED3-96B0-578C1E5C6F46

treatment provided by

ZooKeys by Pensoft

scientific name

Leentvaaria Demoulin, 1966
status

 

Taxon classification Animalia Ephemeroptera Leptophlebiidae

Leentvaaria Demoulin, 1966 View in CoL View at ENA Figures 5, 6, 7c, d

Diagnosis.

The male imago of Leentvaaria can be distinguished from other genera of the Hermanella complex by the following combination of characters: 1) Eyes separated on meson of head by a short distance-less than 0.5 times the width of the median ocellus (Fig. 5a); 2) Fork of MA asymmetrical and fork of MP slightly asymmetrical (Fig. 6a); 3) Crossvein above fork of MA not slanted (Fig. 6a); 4) Styliger plate enlarged posteriorly, completely covering penis lobes in ventral view (Fig. 6d); 5) Penis divided, each lobe with a long spine apically curved (Fig. 6e).

Description of male imago

(in alcohol). Head (Fig. 5a, b, c, e): Eyes separated on meson of head by short distance-less than 0.5 times width of median ocellus (Fig. 5a, b, c), lower portion of eyes slightly < ¼ length of upper portion.

Thorax: Prosternum with narrow, straight median carina, similar to Hermanella and Hylister , but with longer anterior arms, as in Fig. 5d.

Wings (Fig. 6a, b, c): Maximum width of fore wings 1/3 their maximum length; maximum width of hind wings about ½ their maximum length; maximum length of hind wings 1/5 maximum length of fore wings. Fore wings: vein Rs forked slightly> 1/6 distance from base of vein to margin, fork of vein MA asymmetrical and forked at ½ distance from base of vein to margin, cross vein above fork of MA not slanted; fork of vein MP slightly asymmetrical and forked 1/3 distance from base of vein to margin; vein ICu1 attached at base to vein CuA by crossvein; vein ICu2 attached at base to vein ICu1 by crossvein. Hind wings: costal projection well-developed, acute; located ½ distance from base to apex; vein MP unforked; apex of wings rounded; vein Sc ½ distance from base to wing margin, ending in crossvein; 4-6 crossveins present.

Legs. Ratio of segments in male forelegs, 0.6:1.0 (1 mm): 0.03:0.35:0.30:0.15:0.06. Claws of each pair dissimilar, one apically hooked and one blunt, pad-like.

Abdomen. Genitalia (Fig. 6d, e): Styliger plate: length of segment II of forceps subequal to length of segment III; segment II of forceps 1/9 length of segment I; styl iger plate enlarged posteriorly, completely covering penis lobes in ventral view. Penis divided, each lobe with long spine apically curved. Caudal filaments: terminal filament longer than cerci.

Description of female imago

(in alcohol). Lengths: body, 4.7-4.9 mm; fore wings, 4.9-5.2 mm; hind wings, 0.8-0.9 mm.

Head: Eyes (Fig. 5e) separated on meson of head by 6 times width of lateral ocellus.

Abdomen: Ninth sternum deeply cleft apically.