Felisacus ochraceus Usinger, 1946

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 : 132-134

Felisacus ochraceus Usinger

Figures 6 , 9F , 13C, D , 15E, 19

Felisacus ochraceus Usinger, 1946: 69 (original

description).

DIAGNOSIS: Recognized by the following combination of characters: 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); main coloration of head and pronotum yellow to pale brown, humeral angles not darkened; inner part of clavus whitish yellow, with pale brown or brown margins; cuneus with whitish and translucent outer part and yellow or reddish inner part; labium reaching posterior margin of mesosternum; cuneus 3× as long as wide; medial part of right paramere as wide as basal part, subequal to basal and apical parts combined, its outer margin concave and inner margin convex (fig. 13C); vesica with five spicules, including spicules A, B, C, and H, spicule B with long distal arm (fig. 9F).

REDESCRIPTION: Male. Total length 3.6–4.0. COLORATION (fig. 6): Head: Mostly yellow, sometimes with marking near antennal fossa and stripe behind eye reddish, dorsal surface often with reddish tinge, longitudinal sulcus sometimes pale brown. Eye dark brown with reddish tinge. Labium: Uniformly whitish yellow to yellow. Antenna: Segment I yellow basally and pale brown apically, sometimes reddish yellow; segments II–III pale brown to brown, sometimes reddish brown. Thorax: Pronotum whitish yellow to yellow, anterior margin and punctures between anterior and posterior parts pale brown; scutellum and mesoscutum whitish yellow to yellow, depression between them pale brown; thoracic pleura yellow, scent gland evaporative area whitish yellow, paler than thoracic pleura, or whitish basally and yellow or reddish apically. Hemelytron: Mostly translucent and colorless; inner part of clavus whitish yellow, with pale brown or brown margins; corium with marking along apical part of clavus pale brown, marking along inner margin of corium yellow, sometimes red posteriorly; embolium with yellow or red apex and yellow or pale brown margins; cuneus with yellow or reddish inner part, margins yellow to pale brown; sometimes cuneus uniformly reddish yellow; membrane cell yellow. Legs: Mostly whitish yellow, femora apically and tibiae basally yellow, sometimes femora apically and entire tarsi reddish yellow, tarsi yellow to pale brown. Abdomen: Yellow with red markings dorsally and laterally or uniformly yellow. SURFACE AND VESTITURE: Corium smooth, shallow and scarce punctures. Dorsum, antennal segment I and femora clothed with setae shorter than antennal segment II diameter; abdomen clothed with short erect setae. STRUCTURE AND MEA- SUREMENTS: Body ca. 4.3–4.7× as long as pronotum width. Head: Depression delimiting occipital region distinct 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 of head as long as eye diameter; distance from eye to pronotum longer than eye diameter, not swollen laterally (as in Namyatova et al., 2016: fig. 4E); vertex ca. 1.4–1.7× as wide as eye, upraised (as in Namyatova et al., 2016: fig. 6D). Labium: Reaching posterior margin of mesosternum or slightly surpassing it; segments I and II strongly reduced, combined shorter than half of segment III; segments I as long as wide (as in Namyatova et al., 2016: figs. 6D, 9C); segment II slightly longer than wide, its dorsal surface elongate posteriorly; segment III longer than ventral side of head; segment IV ca. 1.5× as long as segment III. Antenna: Segment I cylindrical (as in Namyatova et al., 2016: fig. 8A), ca. 1.5– 1.6× as long as head width, ca. 1.0–1.1× as long as pronotum width; segment II twice as long as head width, ca. 1.4–1.5× as long as pronotum width; segment III slightly longer than segment II. Thorax: Anterior and posterior parts subequal in length, collar delimited; posterior part slightly upraised; posterior margin concave, pronotum ca. 1.2–1.3× as wide as long and ca. 1.4–1.5× as wide as head; mesoscutum exposed; Hemelytron: Area along inner margin of corium flat; inner margin of cuneus convex (as in Namyatova et al., 2016: fig. 13E), outer margin ca. 3× as long as base. Abdomen: Genital capsule rotated left at right angle relative to rest of abdomen. Genitalia: Genital capsule (fig. 15E) ca. 1.5× as long as wide; ventral wall ca. 1.5× as long as dorsal wall, with posterior margin of ventral wall semioval, smooth, without outgrowth(s), its apex inclined leftward, not curved dorsally; sides of genital capsule not modified; right paramere socket slightly angulate and left socket rounded; distance between paramere sockets subequal to half of genital capsule width at base; right angle of left paramere socket not projecting. Right paramere (fig. 13C) distinctly curved in apical half; apex slightly concave; medial part as wide as basal part, bearing setae, with outer margin concave and inner margin convex; outer angle distinct; inner angle indistinct, without setae; basal part very short, basal part of paramere ca. 0.15–0.2× as long as rest of paramere. Left paramere (fig. 13D) 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 only on middle part near outer margin. Aedeagus (general view as in Namyatova et al., 2016: fig. 22I) conjunctiva weakly sclerotized, sclerotized part of ductus seminis very short, secondary gonopore placed at base of vesica in repose; vesica with five spicules, including spicules A, B, C, and H, spicule B with long apical arm (fig. 9F).

Female. Total length 3.8–3.9. COLORATION (fig. 6): Head: Similar to male, but dorsal surface slightly darker than other sides. Labium: As in male. Antenna: Similar to male, segment II uniformly reddish brown. Thorax and legs: As in male. Hemelytron: Similar to male, but cuneus with outer part colorless and with inner part reddish or pale brown, rarely mostly yellow with pale brown inner part. Abdomen: Pale brown with reddish dorsal surface. SURFACE AND

VESTITURE: As in male. STRUCTURE AND

MEASUREMENTS: Structure as in male; body ca. 4.2–4.4× as long as pronotum width; ca. vertex 1.3–1.6× as wide as eye; antennal segment I ca. 1.2–1.5× as long as head width, ca. 0.9–1.0× as long as pronotum width; segment II ca. 1.9– 2.0× as long as head width, ca. 1.3–1.4× as long as pronotum width; pronotum ca. 1.1–1.3× as wide as long and ca. 1.4–1.6× 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: Guam (fig. 19).

HOST PLANTS: Ferns ( Usinger, 1946).

DISCUSSION: Antennal segment IV is lost in males and segment III–IV are lost in females. Usinger (1946) described F. ochraceus from a number of specimens. We examined the paratypes of both sexes. Based on the structure of the parameres, the specimens described by Carvalho (1981) as F. ochraceus belongs to another species, whose identity we were not able to establish; however, the shape of parameres in figures 115 and 116 of Carvalho (1981) is similar to those of F. nigrescens and F. solomonicus (figs. 13A, R), but coloration differs from both of these species.

Felisacus ochraceus is almost identical with F. australicus in structure, including the parameres (cf. fig. 11E, F with fig. 13C, D) and vesical spic- ules (cf. fig. 8C with 9F), but the latter species differs in coloration, with the head, antennal segment I, and the pronotum mostly yellow to pale brown, the inner part of clavus pale brown to brown, and the scent gland evaporative area pale brown.

Felisacus ochraceus is also similar in coloration to F. amboinae , F. filicicola , F. dauloi , F. insularis , and F. linae (figs. 4, 5). All these species can be separated from F. ochraceus by the medial part of right paramere wider than the basal part and distinctly shorter than the basal and apical parts combined, with the outer margin straight or slightly concave (figs. 11C, X, AD, 12C, K), as well as in the number and shape of the vesical spicules (fig. 8B, G, I, L, P). Felisacus dauloi also differs from F. ochraceus by the cuneus colorless or yellow basallyand reddish apically. Felisacus linae differs from F. ochraceus by the cuneus mostly translucent with the inner part pale brown.

MATERIAL EXAMINED: Paratypes: GUAM: Piti, 13.46 ° N 144.69166 ° E, 5 m, 24 Aug 1936, O.H. Swezey, 13 00399747), 3♀ (00399751, 00399749, 00399750) ( CAS). Additional material: GUAM: Mariana Is: Guam, Mt. Lamlam, Oct 1957, N.L.H. Krauss, 23 (00043157, 00043159) ( BPBM). Mt. Alifan, 13.38055 ° N 144.67138 ° E, Oct 1957, N.L.H. Krauss, 1♀ (00043161) ( BPBM). Yigo, 13.53194 ° N 144.88027 ° E, 126 m, Oct 1957, N.L.H. Krauss, 13 (00043158), 2♀ (00043160, 00043162) ( BPBM).

Figures

FIGURE 6. Habitus of Felisacus species.

FIGURE 9. Vesical spicules of Felisacus species.

FIGURE 13. Parameres of Felisacus species.

FIGURE 19. Distribution of Felisacus species.