Grenadaptera, Heiss, 2019

Heiss, Ernst, 2019, New genera and species of apterous Carventinae (Hemiptera, Heteroptera, Aradidae) Irom Lesser Antilles, Linzer biologische Beiträge 51 (1), pp. 69-82 : 75-76

Grenadaptera nov.gen.

T y p e s p e c i e s: Grenadaptera ursulae nov.sp.

E t y m o l o g y: Refers to the Island of Grenada, where it was discovered and the apterous condition of this new genus and first Aradid recorded from there.

D i a g n o s i s: Apterous, small sized, body oval; coloration reddish brown; antennae slender with first segment thickest; eyes moderately stalked; surface of thorax and abdomen glabrous with oval callosities and rugosities, lateral margins raised and beset with setigerous tubercles; fused median carinate ridge smooth, reaching from pronotum to tergal plate; deltg II+III fused; spiracles II -VII lateral and visible from above; sternite VII of male with a large cone like glandular tubercle at apex, directed posteriorly which is visible from above; rostrum arising from a slit ̅ like atrium.

D e s c r i p t i o n: Head longer than wide, genae produced over clypeus; antenniferous lobes with acute apex; antennae less than twice as long as width of head, segment I and III longest, II shortest; eyes moderately stalked; postocular lobes roundly converging to constricted neck; rostrum arising from a slit like atrium.

Thorax: Pronotum strongly transverse, disk with oval callosities and raised granulate lateral lobes, lateral margins straight; structure of lateral sclerites of meso- and metanotum as of pronotum, medially separated by a smooth finger like ridge which is widening at meso- metanotum border then conical along fused mtg I+II reaching to mtg III.

Abdomen: Tergal plate with a median longitudinal elevation on mtg IV+V; deltg II+III fused, posterolateral angles of deltg V-VII with a triangular expansion of the dorsally reflexed vltg V-VII bearing the spiracles V-VII; venter with fused median parts of pro-, meso-, metanotum and sterna II+III smooth and glabrous; spiracles II-VII lateral and visible from above; sternite VII of male with a distinct large conical glandular tubercle placed at apex and directed posteriorly.

Legs: Unarmed, trochanters fused to femora; pulvilli present.

C o m p a r a t i v e n o t e s: The combination of characters as structure of antennae, stalked eyes, shape of pronotum and of median thoracic ridge and structure and position of male glandular tubercle on vltg VII is not shared by any other apterous neotropical Aradidae (KORMILEV & FROESCHNER, 1987; COSCARON & CONTRERAS, 2012; PANIZZI & GRAZIA, 2015; HEISS 2018).