Felisacus ceylonicus, Namyatova & Cassis, 2016

Namyatova, Anna A. & Cassis, Gerasimos, 2016, Revision And Phylogeny Of The Fern-Inhabiting Genus Felisacus Distant (Insecta: Heteroptera: Miridae: Bryocorinae) Anna A. Namyatova And Gerasimos Cassis, Bulletin of the American Museum of Natural History 2016 (403), pp. 1-169 : 65-67

Felisacus ceylonicus , sp. nov.

Figures 4 , 10C , 11R, S , 14H , 17

DIAGNOSIS: Recognized by the following combination of characters: marking on corium dark brown, C-shaped, its anterior and posterior parts reaching R+M (fig. 4); cuneus brown apically; antennal segment I widened (as in Namyatova and Cassis, in press: fig. 8B), red; antennal segment II yellow with red markings; vertex swollen laterally behind eye; ventral wall of genital capsule with angulate outgrowth posteriorly (fig. 14H); right paramere sickle shaped, with inner angle bearing distinctly curved outgrowth; inner margin of medial part of right paramere convex, without swelling (fig. 11R); apical part of left paramere narrow, with tooth apically and outgrowth dorsally; medial part with narrow outgrowth (fig. 11S); distal half of ductus seminis sclerotized (fig. 10C); vesica without spicules (fig. 10C).

DESCRIPTION: Male. Total length 2.6. COL- ORATION (fig. 4): Head: Mostly pale brown with reddish markings around eyes and antennal fossae and on clypeus. Eye red. Labium: Segments I–II pale brown; segments III–IV yellow. Antenna: Segment I red; segment II yellow with red markings; segments III–IV pale brown. Thorax: Anterior part of pronotum brown; posterior part of pronotum dark brown; scutellum and mesoscutum dark brown; thoracic pleura brown, scent gland evaporative area whitish yellow. Hemelytron: Clavus opaque, dark brown; corium, embolium, and cuneus mostly translucent and colorless; corium with brown anterior angles and C-shaped dark brown marking with anterior and posterior parts of this marking reaching costal margin; embolium and cuneus brown apically; membrane and membrane cell brown. Legs: Coxae whitish yellow; femora mostly whitish yellow, fore- and middle femora reddish apically, hind femur with apical half reddish brown; tibiae mostly brown with apical 1/3 whitish yellow; tarsi whitish yellow. Abdomen: Yellow, segments VIII– IX brown. SURFACE AND VESTITURE: Corium smooth with distinct punctation. Dorsum with setae mostly longer than antennal segment II diameter; antennal segment I clothed with suberect setae shorter than antennal segment II diameter; femora with suberect setae twice as long as antennal segment II diameter; abdomen with erect setae of different length. STRUCTURE AND MEASUREMENTS: Body ca. 3.9× as long as pronotum width. Head: Depression, delimiting occipital region, present only dorsally; distance between depression and pronotum slightly longer than eye diameter; longitudinal sulcus on dorsal surface distinctly shorter than eye diameter; distance from eye to pronotum distinctly longer than eye diameter, swollen laterally; vertex ca. 1.6× as wide as eye diameter, flat (Namyatova et al., 2016: fig. 6E); buccula ca. 0.2× as long as clypeus. Labium: Almost reaching posterior margin of mesosternum; segments I and II reduced, combined slightly longer than half of segment III; dorsal surface of segment II not elongate posteriorly (as in Namyatova et al., 2016: fig. 6E); segment III shorter than ventral side of head; segment IV twice as long as segment III. Antenna: Segment I widened medially (as in Namyatova et al., 2016: fig. 8B), ca. 1.3× as long as head width, ca. 0.7× as long as pronotum width; segment II ca. 1.8× as long as head width, ca. 0.9× as long as pronotum width; antennal segment III slightly longer than segment II and twice as long as segment IV. Thorax: Anterior part of pronotum distinctly shorter than posterior part; collar distinct; posterior part of pronotum distinctly upraised; posterior margin of pronotum usually straight, sometimes slightly concave; pronotum ca. 1.1– 1.2× as wide as long and ca. 1.9× as wide as head; mesoscutum slightly exposed. Hemelytron: Area along inner margin of corium swollen; inner margin of cuneus straight (as in Namyatova et al., 2016: fig. 13F), outer margin of cuneus twice as long as base. Abdomen: Genital capsule rotated left 45° relative to the rest of abdomen. Genitalia: Genital capsule (fig. 14H). Twice as long as wide; ventral wall ca. 1.5× longer than dorsal wall, with apex not curved dorsally; with angulate outgrowth at left side and with right side folded; left side of genital capsule not widened; margins of paramere sockets angulate; distance between paramere sockets ca. 0.3× as long as genital capsule width at base. Right paramere (fig. 11R) sickle shaped, medial part narrower than basal part, without setae, only slightly curved, its outer margin straight; inner margin concave without swelling; outer angle of right paramere absent, inner angle present, with curved outgrowth and bunch of setae on inner margin, basal part ca. 0.5× as long as rest of paramere. Left paramere (fig. 11S) curved medially; apical part not flattened, with toothlike outgrowth apically and with outgrowth on dorsal surface; inner margin of middle part with narrow outgrowth, bearing setae. Aedeagus vesica without spicules; half of ductus seminis sclerotized, secondary gonopore placed near phallotheca mouth in repose; ductus seminis hooked apically (fig. 10C).

Female. Total length 3.5. COLORATION (fig. 4): Head: Similar to male, but maxillary plate with reddish marking and eyes yellow with reddish tinge. Labium: Uniformly yellow. Antenna: As in male. Thorax: Similar to male, thoracic pleura pale brown, mesopleuron with brown marking. Hemelytron: As in male. Legs: Hind femur mostly reddish brown with basal 1/3 whitish yellow. SURFACE AND VESTITURE: As in male. STRUCTURE AND MEASUREMENTS: Structure as in male; body ca. 3.9× as long as pronotum width; vertex ca. 2.2× as wide as eye diameter; segment I 1.4× as long as head width, 0.7× as long as pronotum width; segment II 1.7× as long as head width, 0.8× as long as pronotum width; pronotum ca. 1.2× as wide as long and ca. 2.1× as wide as head. Female genitalia were not investigated.

DISTRIBUTION: Sri Lanka (fig. 17).

HOST PLANTS: Unknown.

ETYMOLOGY: The species is named after the former name of Sri Lanka, “ Ceylon,” where it was collected.

DISCUSSION: Felisacus ceylonicus is similar to F. lindbergae , F. longiceps , F. magnificus , and F. zuparkoi (figs. 4–7) in the pattern of coloration and the structure of the ductus seminis (fig. 10C, F, H, J, P). Felisacus longiceps also has similar paramere structure (cf. fig. 11R, S with fig. 12Q, R). All aforementioned species differ from F. ceylonicus in having the vertex straight laterally behind the eye. Felisacus magnificus can also be separated from F. ceylonicus by the right paramere straight and the left paramere flattened. Felisacus zuparkoi also differs from F.ceylonicus in having claw-shaped vesical spicules, and F. zuparkoi differs in the labium not surpassing the posterior margin of the prosternum.

MATERIAL EXAMINED: Holotype: SRI LANKA: Central Prov.: Peradeniya, Univ. Peradeniya, 7.25416 ° N 80.60194 ° E, 335 m, 20 Mar 1999, TJ Henry, A Wijesekara and C Ariyadasa, 13 (00399955) ( USNM). Paratype: SRI LANKA: Central Prov.: Peradeniya, Univ. Peradeniya, 7.25416 ° N 80.60194 ° E, 335 m, 20 Mar 1999, TJ Henry, A Wijesekara and C Ariyadasa, 1♀ (00399956) ( USNM).

Figures

FIGURE 4. Habitus of Felisacus species.

FIGURE 10. A, C–L, O, P. Apical part of aedeagus of Felisacus species B, E, M. Vesica of Felisacus species. N. Aedeagus of F.webbi.

FIGURE 11. Parameres of Felisacus species.

FIGURE 14. Genital capsule of Felisacus species.

FIGURE 17. Distribution of Felisacus species.