Felisacus cristobalus, 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 : 68-70

Felisacus cristobalus , sp. nov.

Figures 4 , 10D , 11T, U , 14I , 17 DIAGNOSIS: Recognized by the following combination of characters: marking on hemelytron dark brown, with anterior part widened and not reaching R+M (fig. 4); antennal segment I widened (as in Namyatova et al., 2016: fig. 8B), mostly brown to dark brown; cuneus mostly translucent, colorless; posterior part of pronotum mostly brown to dark brown with pale brown stripe medially; inner angle of right paramere with short and abrupt outgrowth (fig. 11T); out- growth on medial part of left paramere widened, angulate (fig. 11U); half of ductus seminis sclerotized, straight, sickle shaped apically (fig. 10D).

DESCRIPTION: Male. Total length 3.5. COL- ORATION (fig. 4): Head: Mostly yellow to pale brown, frontal side slightly paler, buccula anteriorly and clypeus apically brown. Eye brown with reddish tinge. Labium: Segment I yellow to pale brown; segment II brown; segment III yellow, pale brown ventrally; segment IV yellow. Antenna: Segment I pale brown basally and brown to dark brown apically, segment II brown to dark brown; segments III–IV pale brown to brown, sometimes somewhat paler than segment II. Thorax: Anterior part of pronotum pale brown with dark brown anterior margin; posterior part of pronotum dark brown with yellow or pale brown longitudinal sulcus medially; mesoscutum and scutellum pale brown to brown; thoracic pleura pale brown, with brown to dark brown markings; scent gland evaporative area whitish yellow. Hemelytron: Mostly translucent, only clavus opaque; inner part of clavus brown to dark brown; outer part of clavus pale brown to brown; corium translucent, colorless, with marking along inner margin of corium dark brown, its anterior part widened, wider than eye diameter, not reaching R+M vein, posterior part of marking not widened, reaching costal vein; embolium colorless with brown margins; cuneus colorless with brown outer margin; membrane brown anteriorly and colorless posteriorly; membrane cell brown. Legs: Coxae whitish yellow; femora whitish yellow, often yellow apically, with pale brown or brown marking in apical half and often pale brown apically; foretibia pale brown with whitish yellow apex; middle and hind tibiae pale brown basally and whitish yellow apically; tarsal segments I whitish yellow; segments II–III yellow to pale brown. SURFACE AND VESTI-

TURE: Corium smooth, with rare and shallow punctation. Dorsum and forefemur with setae slightly longer than antennal segment II diameter; antennal segment I, middle and hind femora clothed with suberect setae shorter than antennal segment II; abdomen with short erect setae. STRUCTURE AND MEASUREMENTS: Body ca. 4.1× as long as pronotum width. Head: Transverse depression delimiting occipital region present only dorsally, not extending laterally (Namyatova et al., 2016: fig. 6E), distance between depression and pronotum slightly shorter than eye diameter; longitudinal sulcus on dorsal surface of head shorter than eye diameter; distance from head to pronotum distinctly longer than eye diameter; vertex ca. 1.6× as wide as eye, flat (Namyatova et al., 2016: fig. 6E). Labium: Reaching or slightly surpassing posterior margin of prosternum; segments I and II combined as long as segment III; segment I twice as long as wide; segment II slightly longer than wide, slightly shorter than segment I, its dorsal surface not elongate posteriorly (as in Namyatova et al., 2016: fig. 6E); segment III distinctly shorter than ventral side of head length; segment IV ca. 1.5× as long as segment III. Antenna: Segment I slightly longer than head width, swollen basally (as in Namyatova et al., 2016: fig. 8B), ca. 1.2× as long as head width, ca. 0.8× as long as pronotum width; segment II ca. 1.8× as long as head width, ca. 1.2× as long as pronotum width; segment III slightly longer than segment II; segment IV subequal to half of segment III. Thorax: Anterior part of pronotum shorter than posterior part; collar distinct; posterior part slightly upraised; posterior margin of pronotum slightly concave; pronotum ca. 1.1× as wide as long and ca. 1.5× as wide as head; mesoscutum usually 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. Genitalia: Genital capsule (fig. 14I) ventral wall ca. 1.5× as long as dorsal wall, with posterior margin rounded, not curved dorsally, with toothlike outgrowth; margin of paramere sockets distinctly angulate; distance between paramere sockets ca. 0.25× as long as genital capsule width at base. Right paramere (fig. 11T) distinctly curved; in apical half; apex slightly concave posteriorly; medial part slightly wider than basal part, without setae, outer margin of medial part convex, inner margin concave without swelling; outer angle absent; inner angle present with abrupt swelling, bearing setae; basal part of paramere almost as long as rest of paramere. Left paramere (fig. 11U) apical part not flattened, with toothlike outgrowth on posterior side apically and with outgrowth on dorsal surface; middle part with wide outgrowth, bearing setae. Aedeagus vesica without spicules; half of ductus seminis sclerotized, secondary gonopore placed near phallotheca mouth; ductus seminis hooked apically (fig. 10D).

Female. Total length 4.2. COLORATION (fig. 4): Head: As in male. Labium: Similar to male, but labial segment I pale brown. Antenna: Similar to male, but segment I brown, same color as segment II. Thorax: Similar to male, but posterior part of pronotum dark brown with yellow stripe medially, mesoscutum brown; scutellum pale brown. Hemelytron and legs: As in male. Abdomen: Ventral whitish lateral sides, segment IX and dorsal surface brown. SUR- FACE AND VESTITURE: Similar to male, abdomen clothed with erect setae mostly as long as or shorter than antennal segment I width. STRUCTURE AND MEASUREMENTS: Structure as in male; body ca. 4.3× as long as pronotum width; vertex ca. 1.7–1.9× as wide as eye; antennal segment I ca. 1.1–1.3× as long as head width, ca. 0.8× as long as pronotum width; segment II ca. 1.7–1.8× as long as head width, ca. 1.1–1.2× as long as pronotum width; pronotum ca. 1.2× as wide as long and ca. 1.5–1.6× as wide as head. Genitalia (as in fig. 16A, F): Dorsal labiate plate very small and transparent, as wide as distance with apodemes of second valvulae, without striations or membranous ridge medially; semicircular sclerite and sclerotized rings absent; lateral oviducts placed in anterior part; spermathecal gland attached near anterior margin; dorsal labiate plate without distinct tubercles, without membranous lobe posteriorly.

DISTRIBUTION: Solomon Is. (fig. 17).

HOST PLANTS: Unknown.

ETYMOLOGY: The species is named after San Cristobal Is., where two specimens out of three were collected.

DISCUSSION: Antennal segment IV is lost in the female. Felisacus cristobalus is similar to F. fedori in the marking on the corium, with the anterior part not reaching R+M and is broad (fig. 4): The latter species differs in having a yellow pronotum, brown to dark brown posteriorly, the cuneus is red, and the outgrowth on the right paramere is acute (fig. 11AB).

MATERIAL EXAMINED: Holotype: SOLOMON

ISLANDS: San Cristobal: Kira-Kira, 10.44138 ° S 161.91666 ° E, 25 m, 05 Nov 1964, R. Straatman, 13 (00043871) ( BPBM). Paratypes: SOLOMON

ISLANDS: Savo Is., West Coast, 9.13333 ° S 159.78333 ° E, 50 m, 19 Oct 1970, N.L.H. Krauss, 1♀ (00043873) (BPBM). San Cristobal: Kira Kira, 10.44138 ° S 161.91666 ° E, 100 m, Jan 1976, collector unknown, 1♀ (00043872) (BPBM).

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.