Phylloicus monserratensis, 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 : 33-36

Phylloicus monserratensis spec. nov.

( Figs 11 A–11D, 15E)

Holotype ♂, Colombia, Bogotá, Chapinero, Quebrada, La Vieja , 21.xii.2016, leg. P. Ramírez ( ICN).

Paratypes: Same locality, 1 ♂ [pinned], 29.vi.2016, leg. P. Ramírez ( ICN) ; 2♀, 16.xi.2016, leg. W. Mey, genitalia slide Mey 01/17 ( MfN) ; 3♂ [pinned], 21.xii.2016, leg. R. Ospina ( ICN) ; 5♂, 2♀ [pinned], 6.ii.2017, leg. W. Mey ( MfN) .

Etymology. The name refers to the Monserrate Mountain, where the valley of the river La Vieja is situated on its western slope.

Description. Adult ( Fig. 15E ). Length of forewing 13–14 mm, wing span 27–29 mm. Head brown, dorsomesal crest darker brown, setal warts with black hairs, frons yellow-brown; antennae twice forewing length, brown, covered by black hairs on dorsal sides and end of each flagellomere; maxillary and labial palpi brown; mesothorax brown, mesoscutal warts darker; legs pale brown, spurs 2.4.4.; forewings triangular, dark brown, with iridescent, golden patches of hairs on subapical, costal areas, along the anal veins and in basal areas; hind wings grey-brown, each with cubital vein supporting row of long hairs; anal field in both sexes with long, brown hair brushes on membrane between veins. Abdomen brown, tergum IV without coremata.

Male genitalia ( Figs 11 A–11D): Sternum VIII in lateral view vertically shorter than tergum VIII, subtriangular, narrower posteriorly, apical lip overlapping base of elongate sternum IX; tergum IX in lateral view not separated from tergum X, in dorsal view notched anteriorly, margins of notch ridged; tergum X in lateral view elongate, subtriangular, rounded apically and with short, baso-dorsal process, in dorsal view an elongate, triangular plate; preanal appendages in dorsal and lateral views digitate, slender, shorter than tergum X, with granulate surfaces and long hairs; inferior appendages each two-segmented, in lateral view coxopodite tubular, elongate, slender, setose, straight, harpago tubular, truncate, <0.2 times as long as coxopodite; phallic apparatus membranous, in lateral view slightly curved ventrad, phallotremal sclerite U-shaped in ventral aspect.

Female genitalia ( Figs 14C, 14D ): tergum X with short, digitate processes and larger, lateral lobes; sternum VIII with small notch in middle of distal margin; vaginal apparatus with pair of long anterior sclerites and rounded, posterior sclerite bearing short, acute process on ventral side.

Diagnosis. The type series of P. holzenthali Prather 2003 includes a specimen collected from Bogotá. We expected to collect this species on the rivers of the Monserrate Mountain, but the only species of Phylloicus we found there was this undescribed P. monserratensis spec. nov. The new species clearly differs in the male genitalia from P. holzenthali by the absence of a modified tergum IV, the small dorsal process of tergum X, and the small apical lip of sternum VIII. Also, the female genitalia are distinct from P. holzenthali by a different morphology of sternum VIII and the vaginal apparatus. When using the identification key by Prather (2003), the new species keys to P. adamsae Prather 2003 and P. bicarinatus Prather 2003 . The genitalia of those two species, however, have only a remote similarity with P. monserratensis spec. nov., and are obviously not closely related species.

Muñoz-Quesada (2004) has listed another five Phylloicus species occurring in Colombia. One of these, P. crenatus ( Navás 1916) was considered a nomen dubium ( Prather 2003). The species was collected near Muzo. In the absence of preserved type material the correct interpretation of the species is not possible. The name could be synonymized with any of the Phylloicus species occurring in the vicinity of Muzo (e.g., P. lituratus Banks 1920 ).

The recently described P. kinovos Oláh 2016 from Antioquia is not related to P. monserratensis spec. nov., but belongs to the species group with unmodified sternum VIII in the male abdomen ( Oláh 2016).

Figures

FIGURES 14A–14D. Photos of abdomens and genitalia from preparation slides. 14A, Metrichia trisignata spec. nov., male, ventral. 14B, Metrichia longiphallata spec. nov., male, left lateral. 14C–14D, Phylloicus monserratensis spec. nov., female paratype: 14C, genitalia, ventral; 14D, same specimen, abdomen, ventral.

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.