Felisacus liui, 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 : 105-107

Felisacus liui , sp. nov.

Figures 5 , 8Q , 12O, P , 14U , 19

DIAGNOSIS: Recognized by the following combination of characters: small body, length in male 2.6–2.8, in female 2.9; dark coloration with dorsal surface of head and anterior part of pronotum mostly brown, posterior part of pronotum pale brown with brown marking posteriorly, marking along inner margin of corium brown, not reaching R+M; and cuneus with narrow red stripe along inner margin; cylindrical antennal segment I (as in Namyatova et al., 2016: fig. 8A), transverse depression on head extending laterally, vertex upraised (as in Namyatova et al., 2016: fig. 6D); antennal segment I ca. 1.2–1.5× as long as head width; labium reaching posterior margin of mesosternum or slightly surpassing it; middle part of right paramere almost as wide as basal part, shorter than basal and apical parts combined (fig. 12O); vesica with six spicules, none of which can be homologized with the spicules of other species (fig. 8Q)

DESCRIPTION: Male. Total length 2.6–2.8. COLORATION (fig. 5): Head: Varying from dark brown to pale brown; buccula, clypeus, and tubercle around antennal fossa yellow, mandibular and maxillary plates yellow to pale brown. Eye brown with reddish tinge. Labium: Yellow to pale brown, segment III often brown or reddish ventrally and basally. Antenna: Segment I reddish with yellow base, segment II reddish brown or brown, segments III–IV brown. Thorax: Anterior part or pronotum brown with collar pale brown and anterior margin dark brown; posterior part of pronotum whitish yellow to yellow, with small brown marking at posterior margin medially and brown marking near posterior angle; scutellum and mesoscutum whitish yellow, with brown longitudinal stripe medially, rarely uniformly whitish yellow; thoracic pleura pale brown to dark brown; scent gland evaporative area pale brown to brown with reddish apex. Hemelytron: Mostly colorless, translucent; inner part of clavus with orange, reddish, or pale brown margins; brown marking along inner margin of corium narrow, not reaching R+M; embolium with pale brown margins; cuneus with pale brown, orange, or reddish marking along inner margin and pale brown margins, rarely cuneus colorless with yellow margins. Legs: Coxae whitish yellow; femora whitish yellow to yellow with reddish apices; tibiae reddish basally and whitish yellow to yellowish apically; foretibia sometimes uniformly reddish; tarsi whitish yellow to yellow. Abdomen: Yellow with red or brown lateral sides, apex and dorsal surface sometimes uniformly yellow with reddish tinge. SURFACE AND VESTITURE: Corium smooth, often with shallow scarce punctures. Dorsum with suberect setae mostly shorter than or subequal to antennal segment II diameter; antennal segment I and femora with suberect setae shorter than antennal segment II diameter; abdomen clothed with suberect mostly short simple setae. STRUCTURE AND MEASURE- MENTS: Body ca. 4.5–4.8× as long as pronotum width. Head: Transverse depression delimiting occipital region present dorsally and laterally (as in Namyatova et al., 2016: fig. 4E); distance between depression and pronotum distinctly shorter than eye diameter; longitudinal sulcus on dorsal surface longer than eye diameter; distance from eye to pronotum slightly longer than eye diameter, not swollen laterally (as in Namyatova et al., 2016: fig. 4E); vertex ca. 2.0–2.3× as wide as eye, upraised (as in Namyatova et al., 2016: fig. 6D). Labium (as in Namyatova et al., 2016: figs. 6D, 9C): Reaching posterior margin of mesosternum or slightly surpassing it; segments I and II strongly shortened, combined shorter than half of segment III; segment II slightly longer than wide, its dorsal surface elongate posteriorly; segment III slightly longer than ventral side of head; segment IV twice as long as segment III. Antenna: Segment I cylindrical (as in Namyatova et al., 2016: fig. 8A), ca. 1.2–1.4× as long as head width, ca. 0.9–1.1× as long as pronotum width; segment II ca. 1.6– 1.8× as long as head width, ca. 1.2–1.4× as long as pronotum width; segment III subequal to segment II. Thorax: Anterior part of pronotum only slightly shorter than posterior part; collar delimited; posterior part slightly upraised; posterior angles of pronotum not delimited with depression; posterior margin concave, pronotum ca. 1.1–1.2× as wide as long and ca. 1.2– 1.4× as wide as head; mesoscutum exposed. Hemelytron: Area along inner margin of corium almost flat; inner margin of cuneus convex (as in Namyatova et al., 2016: fig. 13E), outer margin of cuneus almost ca. 3× as long as base. Abdomen: Genital capsule rotated left at right angle relative to the rest of abdomen. Genitalia: Genital capsule (fig. 14U) ca. 1.5× as long as wide; ventral wall ca. 1.5× as long as dorsal wall, its posterior margin smooth, semioval, without outgrowth, not curved dorsally; its apex inclined leftward; sides of genital capsule not modified; margins of paramere sockets rounded; distance between paramere sockets subequal to half of genital capsule base. Right paramere (fig. 12O) distinctly curved in apical half; apex straight; medial part slightly wider than basal part, bearing setae, with outer margin concave and inner margin convex; outer angle distinct, slightly swollen; inner angle indistinct, without setae; basal part of paramere ca. 0.2–0.25× as long as rest of paramere. Left paramere (fig. 12P) L-shaped; apical part not flattened, with tooth on posterior side medially (as in fig. 11G) and without outgrowth on dorsal surface; middle part widened, without swelling or outgrowth; setae only on middle part near outer margin. Aedeagus (as in Namyatova et al., 2016: fig. 22I) conjunctiva weakly sclerotized; secondary gonopore placed at base of vesica in repose; sclerotization of ductus seminis around secondary gonopore shorter than wide; vesica with six spicules, none of which can be homologized with the spicules of other species (fig. 8Q).

Female. Total length 2.9. COLORATION (fig. 5): Similar to male, but scutellum and mesoscutum whitish yellow with brown longitudinal stripe, scent gland evaporative area brownish with reddish apex; clavus sometimes yellowish and opaque, cuneus whitish and translucent with reddish inner part and pale brown margins. SURFACE AND VESTITURE: As in male. STRUCTURE AND MEASURE-

MENTS: Structure as in male; body ca. 4.5–4.8× as long as pronotum width; vertex ca. 1.7–2.0× as wide as eye; antennal segment I ca. 1.4–1.5× as long as head width, ca. 0.9–1.1× as long as pronotum width; segment II ca. 1.8× as long as head width, ca. 1.2–1.3× as long as pronotum width; pronotum ca. 1.1–1.2× as wide as long and ca. 1.4–1.5× as wide as head. Genitalia (as in Namyatova et al., 2016: fig. 23F, G): Dorsal labiate plate wider than distance between apodemes of second valvula; mostly smooth, without distinct striations, with semicircular sclerite and distinct sclerotized rings laterally; lateral oviducts placed almost medially, very close to each other, spermathecal gland placed between lateral oviducts; dorsal labiate plate with distinct tubercles, without membranous lobe medially.

DISTRIBUTION: Solomon Islands (Kolombangara Is., Gizo Is., New Georgia Is.) (fig. 19).

HOST PLANTS: Unknown.

ETYMOLOGY: The species is named after Guo- Qing Liu, who loaned us the material from the collection of Nankai University ( China).

DISCUSSION: Feliscaus liui is most similar externally and in dark coloration to F. lambkinae and F. minutus . However, F. lambkinae and F. minutus have a larger red marking on the cuneus (figs. 5, 6). Felisacus minutus is also recognized by the posterior part of the pronotum being

brown laterally. Felisacus lambkinae and F. minutus also differ from F. liui in the shape of vesical spicules (cf. figs. 8Q, O, 9D).

MATERIAL EXAMINED: Holotype: SOLOMON

ISLANDS: Western Province: Gizo, Kolombangara Is., Gizo, 7.93799 ° S 157.09339 ° E, 70 m, Dec 1980, N.L.H. Krauss, 13 (00043238) ( BPBM). Paratypes: SOLOMON ISLANDS: Western Province: New Georgia Islands: Munda, New Georgia Is., 8.31666 ° S 157.25 ° E, 50 m, Nov 1980, N.L.H. Krauss, 1♀ (00043240) ( BPBM). Gizo, Kolombangara Is., Gizo, 7.93799 ° S 157.09339 ° E, 70 m, Dec 1980, N.L.H. Krauss, 43 (00043234– 00043237), 1♀ (00043239) ( BPBM).

Figures

FIGURE 5. Habitus of Felisacus species.

FIGURE 8. Vesical spicules of Felisacus species.

FIGURE 12. Parameres of Felisacus species.

FIGURE 14. Genital capsule of Felisacus species.

FIGURE 19. Distribution of Felisacus species.