Stigmella latifoliae Remeikis, Diškus & Stonis,

Stonis, Jonas R., Diškus, Arūnas, Remeikis, Andrius, Davis, Donald R., Solis, M. Alma & Torres, Nixon Cumbicus, 2016, The first record of Baccharis L. (Asteraceae) as a host-plant genus for Nepticulidae (Lepidoptera), with description of new Stigmella species from South America, Zootaxa 4136 (1), pp. 101-128: 115-119

publication ID

http://doi.org/10.11646/zootaxa.4136.1.4

publication LSID

lsid:zoobank.org:pub:BBC55637-6919-43B3-BB85-83E2AFFE2CED

persistent identifier

http://treatment.plazi.org/id/03B47A7D-FFF7-A138-D7C1-4224AAD3FE6F

treatment provided by

Plazi

scientific name

Stigmella latifoliae Remeikis, Diškus & Stonis
status

sp. nov.

5. Stigmella latifoliae Remeikis, Diškus & Stonis  , sp. nov.

( Figs. 3View FIGURE 3, 52View FIGURES 51 – 54, 55–71View FIGURES 55 – 61View FIGURES 62 – 65View FIGURES 66 – 71, 85View FIGURES 84 – 88, 87, 88)

Type material. Holotype: ♂, COLOMBIA: S of Bogotá, San Antonio del Tequendama municipality, Chicaque (el Parque Natural Chicaque), 4 ° 36 ' 21 "N, 74 ° 18 ' 24 "W, cloud forest, elevation 2200–2550 m, mining larvae on Baccharis latifolia (Ruiz & Pav.) Pers.  , 18.ii. 2013, leg. A. Remeikis & J. R. Stonis, genitalia slide no. RA 604 ( ZMUC). Paratypes: 4 ♂, ECUADOR: Papallacta (Napo Province), 0° 22 ' 27 "S, 78 °08' 35 "W, elevation 3300 m, mining larvae on Baccharis latifolia (Ruiz & Pav.) Pers.  10.i. 2005, field card nos 4804, 4805, leg. A. Diškus & J. R. Stonis, genitalia slides nos AD 523 ♂, AD 605 ♂, AD 607 ♂, AD 639 ♂.

Other examined material. 2 ♀, ECUADOR: Papallacta (Napo Province), 0° 22 ' 27 "S, 78 °08' 35 "W, elevation 3300 m, mining larvae on Baccharis latifolia (Ruiz & Pav.) Pers.  10.i. 2005, field card nos 4804, 4805, leg. A. Diškus & J. R. Stonis, genitalia slides nos AD 608 ♀, AD 610 ♀ ( ZMUC) [Examined, identified as S. latifoliae  but excluded from the type series].

Diagnosis. The new species differs from other known Neotropical Stigmella  in the combination of characters in the male genitalia: 13 large cornuti in the phallus, an angular uncus and angular lobes of vinculum, and closely juxtaposed caudal processes of gnathos. The host-plant Baccharis latifolia  also make this species distinctive. It differs from S. baccharicola  sp. nov. that it most resembles (and is probably closely related to) by its green larva (yellow in S. baccharicola  ), angular lobes of vinculum, and number & size of cornuti (see diagnostics in Figs. 84– 88View FIGURES 84 – 88).

Male ( Fig. 61View FIGURES 55 – 61). Forewing length 2.0 mm; wingspan 4.4 mm (n= 5). Head: palpi cream; frontal tuft ochre; collar and scape golden cream, glossy; antenna longer than half the length of forewing; flagellum with 26–27 segments, dark grey-brown on upper side, pale grey on underside. Thorax and tegula golden brown. Forewing golden brown, with broad, distinctly postmedian fascia and slender, short apical fascia; both fasciae comprising shiny silver lamellar scales; at certain angle of view, apex darker than most of forewing, dark brown; cilia pale grey to greyish brown; underside of forewing dark brown to grey-brown, with no spots or androconia. Hindwing grey to pale grey on upper side and underside, with weak purple iridescence along tornus and apically; no androconia; its cilia pale grey to grey, without purple iridescence. Legs golden cream, with grey-brown darkenings on upper side. Abdomen dark grey or fuscous on upper side and underside; anal tufts short, grey; anal plates cream.

Female. Similar to male.

Male genitalia ( Figs 62–71View FIGURES 62 – 65View FIGURES 66 – 71, 85, 87, 88View FIGURES 84 – 88). Capsule significantly longer (280–305 µm) than wide (185–190 µm). Vinculum with short, distinctly angular lateral (anterior) lobes; ventral plate of vinculum realtively long (about 80 µm). Uncus angular, with two broad lobes each bearing numerous setae ( Figs 63View FIGURES 62 – 65). Gnathos with two juxtaposed caudal processes ( Figs 62, 63View FIGURES 62 – 65, 66View FIGURES 66 – 71); central plate of gnathos large (about 80 µm wide). Valva ( Figs 62, 63View FIGURES 62 – 65, 67View FIGURES 66 – 71) 140– 150 µm long, 65–70 µm broad, with one pointed apical processes; inner lobe slightly bulged; transtilla without sublateral processes ( Figs 63View FIGURES 62 – 65, 66View FIGURES 66 – 71). Juxta membranous, caudally with strongly thickened structure of inverted ‘V’ ( Figs 63View FIGURES 62 – 65, 68View FIGURES 66 – 71). Phallus ( Figs 64, 65View FIGURES 62 – 65, 69View FIGURES 66 – 71) 195–230 µm long, 80–100 µm broad, distally with spined margin ( Fig. 65View FIGURES 62 – 65, 70View FIGURES 66 – 71); vesica with 13 large cornuti; no spinose cornuti developed; largest cornutus 110–130 µm long, smallest 35–50 µm long ( Figs 65View FIGURES 62 – 65, 69, 71View FIGURES 66 – 71, 85, 87, 88View FIGURES 84 – 88); in average, the size ratio of the largest cornuti with the second largest is about 1:1.4, while the size ratio of the largest cornuti with the smallest is about 1:2.7 ( Fig. 88View FIGURES 84 – 88).

Female genitalia ( Fig. 52View FIGURES 51 – 54). Total length about 840 µm. Abdominal apex broad, distinctly truncate. Broad apophyses anteriores longer than very narrow apophyses posteriores. Vestibulum relatively broad, without sclerites. Accessory sac small and folded. Ductus spermathecae narrow, without distictive coils (chitinized convolution) (see Fig. 52View FIGURES 51 – 54). Corpus bursae 335 µm broad, oval shaped, covered with numerous and well visible comb-like pectinations but without signa.

Bionomics. Larvae mine in leaves ( Figs 56, 58, 60View FIGURES 55 – 61). Host-plant: Baccharis latifolia (Ruiz & Pav.) Pers.  ( Asteraceae  ) ( Fig. 1View FIGURES 1 – 2). Larva green with dark brownish green intestine and pale brown head; mine in January and February. Long sinuous or contorted gallery of leaf-mine with relatively broad central line of black frass ( Figs 56, 58, 60View FIGURES 55 – 61), which in initial part of mine can be interrupted; usually with narrow empty areas of the gallery without frass. Larval exit slit on upper side of the leaf. Cocoon beige-brown to beige cream; length 2.5 mm, maximal width 1.2–1.3 mm ( Fig. 59View FIGURES 55 – 61). Adults emerged in February and March.

Distribution ( Fig. 3View FIGURE 3). This species occurs in the equatorial Andes (from Colombia to eastern slopes of the Andes in Ecuador) at altitudes between 2200–3300 m, predominantly in cloud forest habitats ( Fig. 55, 57View FIGURES 55 – 61). Etymology. The species is named after the host-plant Baccharis latifolia  .

ZMUC

Zoological Museum, University of Copenhagen