Lincus incisus Rolston, 1983

Maciel, Aline S., Garbelotto, Thereza de A., Winter, Ingrid C., Roell, Talita & Campos, Luiz A., 2015, Description of the males of Lincus singularis and Lincus incisus (Hemiptera: Pentatomidae: Discocephalinae), Zoologia 32 (2), pp. 157-161: 159-160

publication ID

http://doi.org/ 10.1590/S1984-46702015000200007

persistent identifier

http://treatment.plazi.org/id/3A1B87A3-FFF9-E713-FEA4-FABBFCAC5B50

treatment provided by

Valdenar

scientific name

Lincus incisus Rolston, 1983
status

 

Lincus incisus Rolston, 1983  

Figs. 10-18 View Figures 10-18

Lincus incisus Rolston, 1983: 1   , 3, 4, 9-10, Figs. 8-9 View Figures 1-9 (female holotype from De Mapane, Suriname, deposited in RMNH, not examined, no paratypes); Campos & Grazia, 2006: 153 (list).

Description of the male. The fuscous general color of male and its general morphology, including the anterolateral margins of pronotum expanded in obtuse angle, posterior to pronotal lobes, are as described for females by ROLSTON (1983) (Fig. 10). Genitalia. Pygophore subrectangular. Surface with short setae. Dorsal rim concave, bearing setae lateral to segment X ( Fig. 11 View Figures 10-18 , dr). Posterolateral angles obtuse ( Fig. 11 View Figures 10-18 , pa), depressed, with 1+1 median projections ( Fig. 11 View Figures 10-18 , mp). Segment Xsclerotized, ventrally directed; apex expanded and flattened ( Fig. 11 View Figures 10-18 , X); anal opening circular, and genital opening in longitudinal slit, both at ventral surface ( Fig. 12 View Figures 10-18 ). Ventral rim concave, with setae along the margin, medially carinated ( Fig. 12 View Figures 10-18 , vr). Ventral surface tumescent on disc, with 1+1 lateral sulci following ventral rim ( Fig. 12 View Figures 10-18 , t). Parameres inconspicuous, attached to the articulatory apparatus of phallus, subrectangular and with an apical tuft of setae ( Figs. 13-15 View Figures 10-18 ). Phallus. Phallotheca globose, strongly sclerotized ( Figs. 16-18 View Figures 10-18 , ph). Vesica elongated, medially narrowed, longer than the combined lengths of phallotheca and ductus seminis distalis ( Figs. 16-18 View Figures 10-18 , v); with one globose dorsal projection posteriorly directed ( Figs. 16-18 View Figures 10-18 , dp); 1+1 lateral globose projections, posteriorly directed ( Figs. 16-18 View Figures 10-18 , lp); posterior projection truncated, bearing ductus seminis distalis ( Figs. 16-18 View Figures 10-18 , pp). Ductus seminis distalis antero-dorsally arched toward the projections of vesica ( Fig. 18 View Figures 10-18 , ds).

Measurements (n = 3). Total length 12.55 ± 0.79 (11.86- 13.42); width of abdomen 6.77 ± 0.32 (6.46-7.10); head length 2.18 ± 0.11 (2.06-2.28); head width 2.63 ± 0.06 (2.56-2.68); eye length 0,60 ± 0.03 (0.57-0.63); eye width 0.78 ± 0.03 (0.75- 0.82); interocellar distance 0.70 ± 0.01 (0.69-0.71); interocular distance 1.12 ± 0.05 (1.07-1.15); pronotum length 3.47 ± 0.18 (3.27-3.59); pronotum width 6.01 ± 0.18 (5.82-6.17); length of pronotal lobe 0.41 ± 0.02 (0.40-0.44); pronotal lobe width 0.85 ± 0.02 (0.80-0.84); scutellum length 4.45 ± 0.30 (4.12-4.70); scutellum width 3.65 ± 0.08 (3.55-3.70); length of antennomers: I 0.97 ± 0.04 (0.92-1.00); II 1.12 ± 0.08 (1.07-1.21); III 1.42 ± 0.07 (1.35-1.50); IV 1.38 ± 0.20 (1.2-1.56); V 1.78 ± 0.00 (1.78- 1.78); length of labial segments: I 1.35 ± 0.70 (1.28-1.42); II 2.43 ± 0.14 (2.34-2.60); III 1.97 ± 0.14 (1.85-2.13); IV 1.66 ± 0.05 (1.63-1.72).

Material examined. BRAZIL, Amazonas: 3 females, São Miguel da Cachoeira ( Cachoeira do Tucano – Pico da Neblina ), X.2007, Nogueira & Candiani leg GoogleMaps   .; Pará: 2 males, Moju ( Fazenda Sococo ) [-2.11; -48.00], 01.XII.1995, P. Lins leg.; GoogleMaps   1 male, Tucuruí ( Rio Tocantins ) [-3.7; -49.7], 20.VII.1984, W. França leg. GoogleMaps  

Distribution: Suriname, Brazil (Amazonas and Pará States).

Remarks. Lincus incisus   was placed, along with eight other species ( Lincus convexus Rolston, 1983   , Lincus croupius Rolston, 1983   , Lincus fatigus Rolston, 1983   , Lincus operosus Rolston, 1983   , Lincus securiger Breddin, 1904   , Lincus sinuosus Rolston, 1983   , Lincus spathuliger Breddin 1908   and Lincus vandoesburgi Rolston, 1983   ), in the “hatchet-lobed” informal group of species ( ROLSTON 1983). This placement was justified in view of the anterior pronotal angles resembling a hatchet blade in Lincus incisus   . Males of L. incisus   share some genitalic characters with males of L. convexus   , L. securiger   , L. sinuosus   and L. vandoesburgi   , such as the presence of 1+1 median projections at posterolateral angles, ventrally directed; and an elongated phallus bearing apical projections. The ductus seminis distalis bent toward the projections of the vesica is also observed in L. vandoesburgi   . Within the hatchet-lobed group, L. incisus   and L. vandoesburgi   share the pronotal margin posterior to the lobes expanded on each side into an obtuse projection. The incision between each lobe and the anterolateral margin of the pronotum is deepest in L. incisus   , reaching half the width of an eye ( Fig. 10 View Figures 10-18 ; ROLSTON 1983, Figs. 1, 8 View Figures 1-9 ). Lincus incisus   can also be distinguished from L. vandoesburgi   by the more convex apical margin of the posterolateral angles of the pygophore, and by a more developed median projection ( Figs. 11-12 View Figures 10-18 , mp; for L. vandoesbugi   see ROLSTON 1983, Fig. 2 View Figures 1-9 ). Among the other species in the hatchet-lobed group with known males, L. incisus   differs from L. sinuosus   by the median projection below the apical margin of the posterolateral angles of the pygophore ( Figs. 11-12 View Figures 10-18 , mp; for L. sinuosus   see ROLSTON 1983, Fig. 17); from L. convexus   and L. securiger   by the more developed median projection and the ventral opening of the pygophore broader and shallower ( Figs. 11-12 View Figures 10-18 , mp, vr; for L. convexus   and L. securiger   see ROLSTON 1983, Figs. 23 and 26). Notwithstanding the placement of L. incisus   within the “hatchet-lobed” group, it is noticeable that the shape of segment X, with an expanded and flattened apex, is also a feature of some species of the “bigeyed” group ( ROLSTON 1983), such as Lincus lethifer Dolling, 1984   , Lincus substyliger Rolston, 1983   and Lincus subuliger Breddin, 1908   . Lincus incisus   is recorded for the first time in Brazil.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Hemiptera

Family

Pentatomidae

Genus

Lincus

Loc

Lincus incisus Rolston, 1983

Maciel, Aline S., Garbelotto, Thereza de A., Winter, Ingrid C., Roell, Talita & Campos, Luiz A. 2015
2015
Loc

Lincus incisus

CAMPOS LA & GRAZIA J 2006: 153
ROLSTON LH 1983: 1
1983