Hexanchorus onorei sagittatus, Linsky, Marek, Ciamporova-Zatovicova, Zuzana & Ciampor Jr, Fedor, 2019

Linsky, Marek, Ciamporova-Zatovicova, Zuzana & Ciampor Jr, Fedor, 2019, Four new species of Hexanchorus Sharp from Ecuador (Coleoptera, Elmidae) with DNA barcoding and notes on the distribution of the genus, ZooKeys 838, pp. 85-109 : 98

Hexanchorus onorei sagittatus ssp. n. Figs 8, 9, 18, 19, 33, 34, 36

Material examined.

Holotype (PUCE) ♂: "Ecuador, Morona-Santiago prov., Río Indanza, Indanza env., 03°04 ‘09.3“ S, 78°28 ‘07.9“ W 772m a.s.l., 28.8.2013, at light, Čiampor & Čiamporová-Zaťovičová lgt.". Paratypes (PUCE, NMW, CCB): 1 ♂, 5 ♀♀ with the same data as holotype.

Diagnosis.

Hexanchorus onorei sagittatus ssp. n. (Figs 8, 18) is externally similar to Hexanchorus onorei onorei sp. n. but can be distinguished by combination of the following male characters: 1) smaller size (CL: 3.22 - 3.25 mm vs 3.44 - 3.57 mm); 2) fifth ventrite distinctly wider emarginate; 3) aedeagus arrow-like in ventral view.

Description.

Male. Aedeagus (Figs 33, 34) elongate. Penis in ventral view arrow-like, mostly subparallel with short apophyse, tapering towards apex, then widened into subglobular portion with protruded, rounded apex, in lateral view with apex emarginate, then slender, sinuate, with widened basal third, with corona membranous, fibula not visible, curved oblong sclerotized structure present in middle. Parameres slightly asymmetrical, about half as long as penis, in lateral view widest at base, narrowest in middle, apical part with rounded apex, in ventral view jointed in middle, with rounded apex. Phallobase parallel-sided, curved in lateral view. Penis and parameres with sparse fine spines.

Female. Externally similar to male (Figs 9, 19) except bigger (CL: 3.65 - 3.68 mm); elytra with pointed and vertically curved apices; meso - and metatibiae without carina on inner apex; first three ventrites medially convex and fifth ventrite only feebly emarginated. Females vary in size (PL: PL: 0.76 - 0.78 mm, PW: 1.07 - 1.09 mm, EL: 2.88 - 2.90 mm, EW: 1.35 - 1.37 mm).

Variation. We observed variation in size and pubescence, especially on abdominal sterna. Scale of green iridescence differed substantially.

Etymology.

Latin, sagittātus (formed like arrow), in reference to its arrow-like shape of penis.

Distribution.

Known only from the one locality in Morona-Santiago Province (Fig. 36).