Marilia bogotaensis, 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 : 36

Marilia bogotaensis spec. nov.

( Figs 12 A–12D, 15F)

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

Paratypes: same data, 2♂ [pinned], 6.ii.2017, leg. W. Mey ( MfN) .

Etymology. The specific name is derived from Bogotá.

Description. Male ( Fig. 15F ). Length of each forewing 9 mm, wing span 19–20 mm. Head brown, frons and vertex densely covered by grey-white hairs; maxillary and labial palpi dark brown, scapes bulbous, with grey-white hairs, antennae nearly twice as long as forewings, dark brown, white-ringed at articulations of flagellomeres, eyes small, widely separated middorsally; forewings with brown veins and grey-white hairs on wing membrane, large brown spot on bifurcation of cubitus and crossvein cu-a; hindwings white, Cu1a+1b seemingly running onto M3+4, Cu2 and A1 with short, basal stalk, jugum and jugal margins of hindwings with long, thin hairs. Forelegs brown, middle and hind legs yellow-brown, tarsal spines black, spurs 2.4.4. Abdomen grey-brown.

Male genitalia ( Figs 12 A–12D): Segment IX in lateral view vertical anteriorly, separated on lateral side into tergum and sternum by broad, pleural sclerite; tergum X straight and membranous dorsally, apicolateral sides sclerotized and folded medioventrad, lateral hooks absent; preanal appendages triangular, somewhat twisted in basal half, nearly as long as tergum X; inferior appendages elongate, each with apical segment small; phallic apparatus with short and slightly curved phallotheca, phallotremal sclerite spatulate in lateral view, U-shaped in ventral view.

Female: unknown

Diagnosis. The new species shares with M. lateralis Flint 1983 the sclerotized, apicolateral sides of tergum X and the straight inferior appendages. However, preanal appendages and phallic apparatus are of different morphology. Also, the small eyes of the male exclude the species from a closer relationship with M. lateralis , where eyes meet mid-dorsally. Similar genitalia and small eyes are present in M. microps Flint 1991 which was described from Choco and Antioquia, but it does not exhibit triangular preanal appendages, a character which is present in another Colombian species, M. modesta Banks 1913 . The phallic apparatus of the latter species is strongly bent basally and much longer than in the new species.

Figures

FIGURES 15A–15F. Trichoptera spp., photos of adults, dorsal view. 15A, Atopsyche viejae spec. nov., male paratype; 15B, Atopsyche flavoantennata spec. nov., female paratype; 15C, Smicridea colombosaucia spec. nov., male paratype; 15D, Polycentropus joergenseni Ulmer 1909, male; 15E, Phylloicus monserratensis spec. nov., male paratype; 15F, Marilia bogotaensis spec. nov., male paratype.

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.