Felisacus glabratus (Motschulsky)

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 : 85-88

Felisacus glabratus (Motschulsky) , status nov.

Figures 5 , 8J , 11 AF, AG, 14N, 18

Liocoris glabratus Motschulsky, 1863: 87 (original description).

Felisacus glabratus Distant, 1904: 439 (comb. nov.).

Hyaloscytus elegantulus var. javanus Reuter, 1908 (original description; synonymized by Poppius, 1914: 148); status nov.

DIAGNOSIS: Recognized by the following combination of characters: mostly whitish yellow to yellow coloration of dorsum, cuneus colorless or with yellow tinge, translucent (fig. 4); antennal segment I cylindrical (as in Namyatova et al., 2016: fig. 8A); transverse depression delimiting occipital region on head extending laterally, vertex in male ca. 1.9× as long as eye diameter upraised (as in Namyatova et al., 2016: fig. 6D); antennal segment I ca. 1.3× as long as head width; cuneus ca. 3× as long as wide; labium reaching middle of mesosternum; ventral wall of genital capsule ca. 1.5× as long as dorsal wall (fig. 14N); medial part of right paramere twice as wide as basal part, and shorter than apical and basal parts combined; its outer margin concave and inner margin convex (fig. 11AF); vesica with five spicules, including spicules B and F (fig. 8J).

REDESCRIPTION: Male. Total length 3.9. COLORATION (fig. 5): Head: Uniformly yellow. Eye pale brown. Labium: Yellow. Thorax: Pronotum, mesoscutum, scutellum and thoracic pleura yellow; scent gland evaporative area whitish yellow, brown apically. Hemelytron: Mostly translucent, colorless; inner margin of clavus whitish yellow, with pale brown margin; area along inner margin of corium mostly yellow, pale brown anteriorly; embolium and cuneus with yellow tinge and with pale brown margins; membrane cell yellow. Legs: Coxae, femora, and tibiae yellow. Abdomen: Uniformly yellow. SUR- FACE AND VESTITURE: Corium smooth, with scarce punctures. Dorsum with setae subequal to or slightly longer than antennal segment II diameter; setae on femora subequal to or shorter than antennal segment II diameter. STRUC- TURE AND MEASUREMENTS: Body ca. 4.0× as long as pronotum width. Head: 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. 1.9× as wide as eye; upraised (in Namyatova et al., 2016: fig. 6D); buccula ca. 0.2–0.25× as long as clypeus. Labium: Surpassing middle of mesosternum but not reaching posterior part of metasternum; segments I and II strongly reduced, combined shorter than half of segment III; segment I shorter than wide (as in Namyatova et al., 2016: figs. 6D, 9C); segment II slightly longer than wide, elongate dorsally; segment III slightly longer than ventral side of head length; segment IV ca. 1.5× as long as segment III. Thorax: Anterior part of pronotum slightly shorter than posterior part; collar delimited; posterior part of pronotum slightly upraised; posterior margin of pronotum concave; pronotum ca. 1.3× as wide as long and ca. 1.6× as wide as head; mesoscutum exposed; outer margins of hemelytra only slightly convex medially. Hemelytron: Vein along behind clavus almost flat; inner margin of cuneus concave (as in Namyatova et al., 2016: fig. 13E), outer margin of cuneus ca. 3× as long as base. Abdomen: Genital capsule rotated left at small angle relative to rest of abdomen. Genital capsule (fig. 14N) 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 rightward; sides of genital capsule not modified; right paramere socket slightly acute and left paramere rounded; distance between paramere sockets subequal to half of genital capsule width at base. Right paramere (fig. 11AF) distinctly curved apically; medial part twice as wide as basal part, bearing setae, with outer margin slightly concave; and inner margin convex; outer angle distinct, widened; inner angle rounded, without setae; basal part of right paramere ca. 0.15–0.2× as long as rest of paramere. Left paramere (fig. 11AG) L-shaped, apical part flattened, with toothlike outgrowth on posterior side medially (as in fig. 11G) and without outgrowth on dorsal surface; middle part widened, without swelling or outgrowth; setae present only on middle part near outer margin. Aedeagus conjunctiva weakly sclerotized; secondary gonopore placed at base of vesica in repose; sclerotization of ductus seminis around secondary gonopore shorter than wide; vesica with five spicules, including spicules B and F (fig. 8J).

Female. Total length 4.0. COLORATION (fig. 5): Head: Yellow with reddish longitudinal red stripe behind eye and red stripe above antennal fossae, tubercle around antennal fossa red laterally. Labium: As in male. Antenna: Segment I red with yellow base, segment II reddish brown, segment III brown. Eye brown. Thorax: Pronotum yellow with longitudinal red tripe laterally; thoracic pleura yellow; scent gland evaporative area whitish yellow basally and pale brown apically. Hemelytron: Similar to male, but inner part of clavus, embolium, and cuneus with red margins, cuneus with reddish tinge, membrane cell red. Legs: Yellow, femora apically and entire tibiae with red stripe, hind tarsus with yellow segment I, segments II–III pale brown. SURFACE AND

VESTITURE: As in male; setae on antennal segment I shorter than antennal segment II diameter. STRUCTURE AND MEASUREMENTS: Structure as in male; body ca. 3.9× as long as pronotum width; vertex ca. 2.0× as wide as eye; antennal segment I cylindrical (as in Namyatova et al., 2016: fig. 8A), ca. 1.3× as long as head width, ca. 0.8× as long as pronotum width; segment II ca. 1.8× as long as head width, ca. 1.0× as long as pronotum width; pronotum ca. 1.3× as wide as long and ca. 1.7× as wide as head.

DISTRIBUTION: Sri Lanka (fig. 18).

HOST PLANTS: Unknown.

DISCUSSION: We examined the male lectotype and female paralectotype of F. glabratus . The specimens were damaged, and no information has been recorded for the antennae and tarsi of male I, the antennal segment IV in female, coloration of female abdomen, the apex of the right paramere (broken). In addition, the female genitalia were not dissected. See generic discussion for the explanation of the nomenclatural confusion in literature.

Felisacus glabratus is closely related to F.albus , F. indicus , and F. insularis . They share a similar structure of the right paramere, which is broad medially, twice as long as the basal part (figs. 11A, AF, 12A, C). All of them also have similar vesical spicules, but differ in their shape and/or number (cf. fig. 8J with fig. 8A, K and L).

MATERIAL EXAMINED: Lectotype: SRI LANKA: Des Montagnes de Nuwara Eliya [Nura-Ellia] et Patannas., 6.9738 ° N 80.8265 ° E, 1700, Motschulsky, 13 (00017876) ( NHRS). Paralectotype: SRI LANKA: Des Montagnes de Nuwara Eliya [Nura-Ellia] et Patannas., 6.9738 ° N 80.8265 ° E, 1700, Motschulsky, paralectotype, 1♀ (00017871) ( NHRS).

Felisacus gressitti Miyamoto

Figures 5 , 18 Felisacus gressitti Miyamoto, 1965: 162 (original description).

DIAGNOSIS: Recognized by the following combination of characters: head and anterior part of pronotum mostly yellow, clypeus mostly dark brown; posterior part of pronotum dark brown with yellow stripe medially; antennal segment I yellow, reddish apically; marking along inner margin of corium brown, narrow, not extending toward R+M anteriorly and posteriorly (fig. 5); antennal segment I slightly widened (as in Namyatova et al., 2016: fig. 6E); labium reaching abdominal segment II; antennal segment II ca. 1.6× as long as head width; right paramere sickle shaped ( Miyamoto, 1965: figs. 35, 36; Lin, 2000: fig. 2B) and left paramere widened with outgrowth posteriorly ( Lin, 2000: fig. 2B).

REDESCRIPTION: Male. Not examined, see Miyamoto (1965) and Lin (2000). Female. Total length 3.2. COLORATION (fig. 5): Mostly yellow with reddish tinge posteriorly; tubercle around antennal fossa whitish yellow; clypeus dark brown, red basally. Eye dark brown, reddish laterally. Labium: Segments I–II whitish yellow, segments III–IV yellow. Antenna: Segment I yellow with reddish tinge; segment II reddish brown; segments III–IV dark brown. Thorax: Anterior part of pronotum yellow; posterior part of pronotum dark brown with yellow stripe medially; scutellum, mesoscutum, and thoracic pleura yellow; scent gland evaporative area yellow basally and red apically. Hemelytron: Mainly translucent and colorless; inner part of corium opaque, yellow, brown basally and along inner margin; area along inner margin of corium brown; embolium with yellow margins, brown apically; cuneus yellow; membrane with brown tinge; membrane cell brown. Legs: Coxae whitish yellow; femora with whitish yellow basal half and yellow apical half; tibiae yellow; tarsal segment I whitish yellow, segments II–III pale brown to brown. Abdomen: Yellow, segment IX reddish yellow with red lateral stripe. SURFACE AND VESTITURE: Corium with shallow punctures. Dorsum and femora with setae longer than antennal segment II diameter; segment II clothed with suberect setae mostly shorter than antennal segment II diameter; abdomen with setae of different length, mostly longer than antennal segment II diameter. STRUCTURE AND MEASUREMENTS: Body ca. 4.1× as long as pronotum width. Head: Depression delimiting occipital region very shallow, present only dorsally; distance between depression and pronotum distinctly shorter than eye diameter; longitudinal sulcus on dorsal surface of head slightly shorter than eye diameter; distance from eye to pronotum shorter than eye diameter, not swollen laterally; vertex ca. 1.7× as wide as eye; vertex upraised; buccula ca. 0.2–0.25× as long as clypeus. Labium: Reaching abdominal segment II; segments I and II reduced, combined longer than half of segment III; segment I shorter than wide; segment II longer than wide, its dorsal surface elongate posteriorly (as in Namyatova et al., 2016: fig. 6E); segment IV twice as long as segment III. Antenna: Segment I slightly widened medially, ca. 1.3× as long as head width, ca. 0.8× as long as pronotum width; segment II ca. 1.6× as long as head width, ca. 1.0× as long as pronotum width; segment III subequal to segment II. Thorax: Anterior part of pronotum subequal to half of posterior part; posterior part slightly upraised; posterior margin straight; pronotum ca. 1.3× as wide as long and ca. 1.6× 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 ca. 3× as long as base. Female genitalia were not investigated.

DISTRIBUTION: South Japan (fig. 18).

HOST PLANTS: Collected from ferns ( Miyamoto, 1965).

DISCUSSION: Characters of the male as given in the diagnosis and discussion were adapted from Miyamoto (1965) and Lin (2000). Miyamoto (1965) described Felisacus gressitti from two males and two females. According to his description, the holotype and two paratypes are preserved in the Entomological Laboratory, Kyushu University, and a single paratype is preserved in BPBM. We did not locate the paratype in BPBM and we were unsuccessful in acquiring information from the Kyushu University on the types.

We examined a single female from the Tomohide Yasunaga collection and it fits the description of F. gressitti . We did not dissect its genitalia: Felisacus gressitti is similar to F. vitilevu externally (fig. 7) and they have a very similar paramere structure (cf. Miyamoto, 1965: figs. 34–38, Lin, 2000: fig. 2B; fig. 13V, W). However, F. vitilevu differs by the clypeus being mostly yellow to pale brown, but is also sometimes red, antennal segment II in males is ca. 1.9–2.1× long as wide, and in female, it is ca. 1.9–2.0× as long as wide. Although these two species are consistently different, differences are minor their status is still in question, as we only examined a single female of F. gressitti . Nonetheless, they are broadly disjunct ( F. gressitti is known from Japan and Taiwan and F. vitilevu inhabits Fiji Islands), and pending further evidence, we treat them as distinct.

Felisacus gressitti is also similar to F. madagascariensis in structure and coloration (fig. 5), but the latter species differs by the pronotum being brown posteriorly, the marking along the inner margin of corium is yellow, and the labium reaches the posterior margin of the mesosternum.

MATERIAL EXAMINED: JAPAN: Okinawa: Ohshittai, Nago, 26.59336 ° N 127.97844 ° E, 02 Dec 2001, T. Yasunaga, 1♀ (00201839) ( TYCN).

Figures

FIGURE 5. Habitus of Felisacus species.

FIGURE 8. Vesical spicules of Felisacus species.

FIGURE 11. Parameres of Felisacus species.

FIGURE 18. Distribution of Felisacus species.