Oecetis chapinera, Mey & Ospina-Torres, 2018

Mey, Wolfram & Ospina-Torres, Rodulfo, 2018, Contribution to the Trichoptera fauna of the river La Vieja, Bogotá, Colombia (Insecta: Trichoptera), Zootaxa 4504 (1), pp. 23-40 : 38

Oecetis chapinera spec. nov.

( Figs. 13 A–13B)

Holotype ♂, Colombia, Bogotá, Chapinero, Quebrada La Vieja , 6.ii.2017, hand net, leg. W. Mey ( ICN).

Etymology. The name is derived from the Chapinero district of Bogotá.

Description. Male. Length of each forewing 9.8 mm, wing span 21 mm. Head and thorax dark brown dorsally, frons and palpi yellow-brown; antennae yellow-brown, with dark rings at articulations; legs brown, tarsal segments darker, spurs 2.2.2. Forewings pale brown, dark spots at ends of veins on wing margin and on all bifurcation points of veins; crossvein r-m and r-cu brown, fork 1 sessil; hind wings light brown, somewhat paler than forewings, fork 1 small, jugal margin with long, brown hairs.

Male genitalia ( Figs 13 A–13B): Segment IX longitudinally short, compact ring with vertical anterolateral margins and slightly concave posterolateral margina, dorsally with pair of mesodorsal knobs; preanal appendages elliptical; tergum X short, triangular, membranous; inferior appendages club-shaped in lateral view, median lobes broad with diverging apices. Phallic apparatus short, curved, excised apically and with phallotremal sclerite in dorsal fold.

Diagnosis. The new species is similar to O. chipiriri Martin, Gibon & Molina 2011 , described from Bolivia. The pattern of forewing spots is nearly identical and segment IX is narrow and tergum X short and triangular in both species. The main differences are in the structure of the inferior appendages, with club-shaped dorsal portion and excised base of O. chapinera spec. nov. Also, the median lobe of each inferior appendage is broader and its hind margin is excised. The phallic apparatus is much shorter than in O. chipiriri and more similar to that of O. avara ( Banks 1895) .

Figures

FIGURES 10–13. Trichoptera spp. 10A–10C, Contulma spec., female genitalia, scale = 0.3 mm: 10A, left lateral; 10B, dorsal; 10C, ventral. 11A–11D, Phylloicus monserratensis spec. nov., male genitalia, scale = 0.5 mm: 11A, left lateral; 11B, dorsal; 11C, ventral; 11D, phallic apparatus, ventral. 12A–12D, Marilia bogotaensis spec. nov., male genitalia, scale: 0.3 mm: 12A, left lateral; 12B, ventral; 12C, dorsal; 12D, phallic apparatus, left lateral. 13A–13B, Oecetis chapinera spec. nov., scale = 0.25 mm: 13A, left lateral, with phallic apparatus in situ; 13B, ventral.