Tytthus entrerianus Carvalho & Carpintero

Henry, Thomas J., 2012, Revision of the Plant Bug Genus Tytthus (Hemiptera, Heteroptera, Miridae, Phylinae), ZooKeys 220, pp. 1-114 : 24-26

Tytthus entrerianus Carvalho & Carpintero Figs 12125-127

Tytthus entrerianus Carvalho and Carpintero 1986: 624 (orig. descrip.); Schuh 1995: 248 (cat.).

Diagnosis.

This species is recognized by the dark brown head and antennal segments I and II, the pale brown pronotum with the anterior half darker brown or reddish brown, the translucent, smoky-brown hemelytra, and the mostly pale legs with only the distal thirds of the femora fuscous. All known specimens of this species are macropterous.

This species keys to Tytthus femoralis based on the pale tibiae with fuscous knee spots and the apically fuscous hind femora. Tytthus entrerianus can be distinguished from Tytthus femoralis by the dark brown or fuscous antennal segment II and having only apical third of the hind femur infuscated.

Description.

Male (n = 1, holotype in parentheses) (composite description based on Carvalho and Carpintero, 1986, and one USNM paratype) (Fig. 12): Length to apex of hemelytron 2.65 mm (3.00 mm), length to base of cuneus 1.80 mm (not given), width across hemelytra 0.74 mm (0.90 mm). Head: Length 0.40 mm (0.30 mm), width across eyes 0.54 mm (0.50 mm), interocular width 0.29 mm (0.30 mm). Labium: Not visible, imbedded in glue (not given). Antenna: Segment I length 0.34 mm (0.30 mm), II 0.94 mm (1.00 mm), III 0.74 mm (0.70 mm), IV 0.56 mm (0.50 mm). Pronotum: Length 0.27 mm (0.20 mm), basal width 0.67 mm (0.70 mm).

Coloration: Head: Uniformly dark brown; pale spot near inner margin of eye absent. Labium: Not visible. Antenna: Segments I and II dark brown; segment III and IV brownish yellow. Pronotum: Anterior half dark brown; posterior half yellowish brown. Mesoscutum: Reddish brown. Scutellum: Reddish brown. Hemelytron: Brown, with basal one fourth and cuneus paler yellowish brown; membrane pale translucent brown. Ostiolar evaporative area: Brown. Ventral surface: Thorax and abdomen brown to reddish brown, genital capsule dark brown. Legs: Pale brownish yellow, apical third of each femur and bases of tibiae (knees) dark brown.

Structure, texture, and vestiture: Shiny, impunctate (buccula imbedded in glue); sparsely set with short, semierect setae. Labium: Not visible. Antenna: Segment I with a few scattered, short, recumbent setae and two long, erect, bristlelike setae at apex; segment II with relatively few, short, recumbent setae. Pronotum: Shiny, impunctate; anterior angles rounded; lateral margins straight, gradually widening to posterior angles; posterior margin weaky concave. Mesoscutum: Shiny, impunctate; set with only a few semierect setae. Scutellum: Shiny, impunctate; set with a few semierect setae. Hemelytron: Macropterous, impunctate, subparallel; length of cuneus two times length; membrane entire with two areoles; set with sparsely scattered, recumbent, brown setae.

Male genitalia (based on Carvalho and Carpintero’s 1986, figures): Left paramere (Fig. 125): Mitt-shaped; right arm long, slender; left arm shorter, spinelike. Right paramere (Fig. 126): Oval. Endosoma (Fig. 127): C-shaped, with apparent secondary gonopore at middle. Phallotheca: Not figured.

Female: None examined; described from 5 paratype ♀♀. Carvalho and Carpintero (1986) indicated that the general aspect and dimensions of females were similar to males.

Host.

Unknown.

Distribution.

Described and known only from Entre Rios Province, Argentina.

Type material examined.

Paratype: ARGENTINA:Entre Rios: Concordia, 31.4°S, 58.033°W, 21 m, Apr 1939 [L. Carpintero], ♂ (00138710) (USNM).

Other specimen examined.

ARGENTINA: Entre Rios: Concordia, 31.4°S, 58.033°W, Jan 1979, collector unknown, 1 ♂ (00138710) (USNM).