Trynocoris Herring, 1976

Gorczyca, Jacek, Wolski, Andrzej & Taszakowski, Artur, 2019, Redescription and new records of the monotypic genus Trynocoris Herring, 1976 (Heteroptera: Miridae: Cylapinae: Fulviini), Zootaxa 4623 (1), pp. 51-60 : 52

Trynocoris Herring, 1976

( Figures 1–20 )

Trynocoris Herring 1976: 91 (as new genus) [type species: Trynocoris lawrencei —original designation]

Trynocoris: Schuh, 1995: 38 (catalog), Gorczyca 2000: 49 (list of the genera of the tribe Fulviini ), 2006: 69 (catalog)

Diagnosis. Distinguished from the other genera of Cylapinae by the following set of characters: body oval to elongate oval, densely and deeply punctured, covered with dense, closely fitting scale-like setae that are broadened toward apex; second antennal segment broad, strongly flattened laterally; cuneus short.

Redescription. Macropterous. Body oval to elongate oval, strongly and deeply punctate, covered with closely fitting, scale-like setae distinctly broadened toward apex ( Figs 1 , 5, 8, 9 ). Head. Elongated horizontally, conical, covered with scale-like setae ( Figs 3–6 ). Vertex weakly carinate posteriorly, with two weakly developed swellings, each bordering inner margin of eye. Eyes relatively small contiguous with pronotal collar; antenniferous tubercle slightly removed from anterior margin of eye ( Figs 3–6 ); first antennal segment short, triangular, covered sparingly with short, dark brown setae apically; second antennal segment distinctly broadened and flattened laterally, covered with black setae, setae covering its dorsal and ventral portions semirecumbent, thick, scale-like, broadened toward apex, lateral portion covered with thinner, linear, almost recumbent setae ( Figs 1–4 ). Third and fourth segments short and thin, covered with fine semi-erect setae longer than their diameter, fourth segment divided ( Fig. 1 ). Labium long reaching the end of pygophore; segment I divided medially; segment II divided subapically ( Fig. 5, 6 ), slightly shorter in female. Thorax. Pronotal collar thin, pronotum wide, lateral margins of pronotum carinate, collar area not well exposed, dorsal surface of pronotum and propleuron deeply and densely punctured ( Figs 5, 6, 8, 9 ). Mesoscutum well exposed, scutellum convex, punctate, covered with dense, scale-like setae ( Figs 1 , 8 ). Metathoracic scent gland evaporative area small, restricted to ventral margin of metathorax; peritreme relatively small ( Figs 5, 7 ). Hemelytra punctate, matte, wide ( Figs 1 , 5, 8 ), clavus thickly punctured ( Fig. 8 ), cuneus very short, costal; apex of hemelytra at level of costal fracture bent abruptly downward ( Figs 1 , 5 ). Legs relatively short, tibiae covered with short, fine setae, meso- and metafemora bearing five and four trichobothria respectively ( Figs 10–11 ). Tarsi two segmented, first segment short, second segment not divided, claws with a very small subapical tooth ( Figs 10–12 ). Abdomen covered with fine, pale setae and white scale-like setae.

Remarks. The genus Trynocoris can be placed in the tribe Fulviini sensu ( Gorczyca 2000, 2006) based on the following characters present also in most fulviines: antennae short, not reaching half of the body ( Fig. 1 ); labium with segment I divided medially ( Fig. 6 ) and segment II divided subapically; metathoracic scent gland efferent system with narrowly developed evaporative areas, restricted to the ventral margin of metepisternum ( Fig. 7 ); and the pygophore with the dorsal wall only weakly longer than ventral wall and with the genital opening directed posteriorly ( Fig. 13 ).

Trynocoris seems to be most similar to the Oriental genus Teratofulvidius Chérot & Gorczyca, 2001 in sharing such combination of characters as the oval body, head and thorax entirely covered with scale like setae, tarsus twosegmented, with tarsomere II not subdivided. It can be distinguished by the antennal segment II that is flattened laterally ( Fig. 2 ), dorsally and ventrally covered with thick, scale-like setae ( Fig. 1, 2 ) whereas in Teratofulvidius segment II is cylindrical, covered with uniform vestiture (pers. obs.). Setae covering body in Trynocoris are flattened, distinctly broadened toward apex while Teratofulvidius has linear setae ( Figs 5–9 ). Among the Neotropical cylapines Trynocoris most strongly resembles the genera Cylapocorella Carvalho, 1989 , Cylapocoris Carvalho, 1954 , Cylapocorisca Carvalho 1989 , and Cylapocoroides Carvalho, 1889 in sharing the punctured dorsal surface. Trynocoris can, however, be easily distinguished by the shape and vestiture of the antennal segment II, the scale-like setae, and the hemelytron that is uniformly punctured whereas in the abovementioned genera the antennal segment II is cylindrical, covered with uniform vestiture, the body is covered with simple setae, and the hemelytron possesses punctures organized in regular rows ( Carvalho 1989a, b, Wolski 2013: Figs 6, 9 , 78).

Figures

FIGURES 1–4. Trynocoris lawrencei: 1–dorsal habitus, 2–ventral view, 3–head in dorsal view, 4–head in lateral view; scale: 0.5 mm.

FIGURES 5–9. Trynocoris lawrencei: 5–lateral view, 6–head in lateral view, 7–ostiolar peritreme, 8, 9–dorsal surface of body.

FIGURES 10–12. Trynocoris lawrencei: 10–2nd leg, 11–3rd leg, 12–3rd leg tarsus.

FIGURES 13–16. Trynocoris lawrencei: 13–genital capsule, 14–lateral view of aedeagus, 15, 16–dorsal view of aedeagus; scale: 0.1 mm.

FIGURES 17–20. Trynocoris lawrencei: 17, 18–left paramere, 19, 20–right paramere; scale: 0.1 mm.