Alyma Arias, 2004

Arias, Elizabeth T., 2004, A New Click Beetle Genus from Chilean Temperate Forests, ALYMA (Coleoptera: Elateridae: Pomachiliini), The Coleopterists Bulletin 58 (3), pp. 413-427 : 413-427

Alyma Arias , new genus

Type Species. Cardiophorus pallipes Solier 1851:17 , present designation. Gender

feminine.

Description. Body stout or elongate; convex; brown, yellowish or reddish brown, with or without longitudinal dark patterns on elytra; integument dull, shiny or lustrous; length 3.9–6.9 mm, width 1.1–2.4 mm.

Head: punctate, punctures confluent; vestiture long, yellowish, pale or gold; frontoclypeal region generally sloping to base of clypeus or extending forward, in some species not visible from above; Eyes small, EI: 2.8; clypeus vertical, thin 1/5 3 width of labrum, narrow at middle; labrum fully exposed, vertical; mandibles bidentate, base of mandibles with a curved carina; maxillary and labial palps with apical segments securiform; antenna 11-segmented, antennal insertion small and inserted into a depression; antennomere 2 conical or serrate, antennomera 3, 4, 9, and 10 conical or serrate, antennomera 5 through 8 serrate, antennomere 11 serrate, triangular or tubular, separated by more than two diameters.

Prothorax: convex; subquadrate; narrowed anteriorly to receive head; lateral margins entirely carinate, sinuate or parallel-sided, inclined mesodorsally, carina directed ventrally from apex of pronotal posterior angles through lateral pronotal margin; pronotal basal area strongly declivous to prescutum; pronotal basal margin straight or curved; prescutum notch V-, or U-shaped; pronotal posterior angles acute, uni-carinate, straight or divergent; prosternum longer than wide, convex; pronotosternal suture appearing double, straight or sinuated, marginate along hypomeral border and at procoxal margin; hypomeron punctate, hypomeron apex exceeding pronotosternal lobe; antennal groove present, carinate apicaly at hypomeral margin; articulation of prothoracic esternite around procoxa acute, directed outward, marginate; pronotosternal spine more or less horizontal with a ledge immediately behind procoxae, with a subapical tooth; without a median longitudinal groove; procoxae globular.

Scutellum : oval, U-shaped or triangular, curved anteriorly, flat or convex; mesosternal cavity oval or subrectangular, cavity sides (also called cavity walls) slightly elevated at mesocoxal region; posterior margin of mesosternal cavity extending in distance posteriorly shortly; mesocoxae longer than wide; mesocoxal cavity open to mesepisternum; mesosternum and metasternum separated by distinct external suture.

Elytra: 2.2–2.9 3 pronotal length; striate, stria with punctures; vestiture short, semi-erect; metathoracic wings absent; metathoracic coxal plate with widest region closest to medial body line rather than to abdominal lateral side; parallel-sided, setae decumbent or semi-erect, gold; apex rounded, or truncate, free of spines. Leg: femur globate; tarsomere 1 through tarsomere 3 decreasing in length distally, tarsomere 3 ventrally flat, tarsomere 4 bilobate.

Abdomen: punctate; last abdominal ventrite angulate.

Female genitalia: 1.48 mm in length, vagina without sclerotised internal structures; delicate, enlarging gradually towards apex; bursa copulatrix globular, anterior section of bursa with 2 accessory glands tube shape, posterior end of bursa greatly enlarged and coiled, medial part of bursa with 2 sclerotised structures star shape and another long sclerotised structure at top, two non sclerotised spiral spermathecae attached to posterior end of bursa ( Fig. 4 ).

Figures

Fig. 4. Female genitalia of Alyma ariasvillegasai (Illustration Nancy V. Arias). Scale bar ¼ 1.0 mm.