Nepiomistus, Brailovsky, 2019

Brailovsky, Harry, 2019, Illustrated identification key to the genera of New World Micrelytrini (Hemiptera: Alydidae: Micrelytrinae), with description of two new genera, one new species and new distributional records, Zootaxa 4668 (3), pp. 393-409 : 397-398

Nepiomistus gen. nov.

Type species: Nepiomistus eximius , sp. nov., here designated.

Description. Head. Longer than wide and longer than total length of pronotum; parallel-sided behind antennae and eyes; apex of tylus not sharply deflected below tips of juga; juga rounded, open, not quite meeting in front of tylus; ocelli small, distant from posterior border of eyes; interocellar distance three times shorter than the space between eye and ocelli; ocellar tubercle small; preocellar pit deep; frons with shallow longitudinal groove; buccula small, hemispherical, reaching level of antenniferous tubercle; antennal segment I uniformly stout like a barrel and surpassing the head; segments II–III cylindrical, robust, IV fusiform; antennal segments I–III densely clothed with erect setae, longer than those on body; setae on antennal segment IV, short, decumbent; setae of antennal segment I–III, longer than the segment thickness; antennal segment II the longest, IV longer than III and I the shortest; rostrum just reaching the anterior margin of metasternum; rostral segment I just reaching base of head and subequal to II, III the shortest, and IV longer than III. Thorax. Pronotum longer than wide, trapezoidal, sides evenly and gradually tapering from posterior to anterior; collar demarcated posteriorly by low broad transverse ridge; anterolateral margins obliquely straight; posterior border almost straight; humeral angles rounded, entire; posterolateral border finely convex. Pro-, meso-, and metapleura densely punctate; acetabulae finely punctate; propleuron flat, without convex expansion near middle third; pro-, meso-, and metasterna smooth; mesosternum with deep median groove; metathoracic scent gland opening elongate, bilobed, directed anterolaterally; peritreme raised; evaporative area glabrous, and rugose. Scutellum. 1.5 longer than wide, triangular, apically subacute, not spinated. Legs. Slender, clothed with setae, longer than those on body; fore coxae nearly touching, middle and hind coxae further apart; femora unarmed; hind femora not surpassing tip of abdomen. Hemelytra. Macropterous, extending beyond the apex of last abdominal segment; clavus with 4 to 5 irregular rows of punctures. Abdomen. Abdominal spiracle small, nearly close to middle third and close to connexival border. Male genital capsule. Middle third of posteroventral margin on caudal view with sharp, elongate median projection and laterally with broad triangular expansion. Paramere. Body elongate, apicaly acute, triangular ( Fig. 56 ). Punctation. Head dorsally heavily granulose and with few scattered punctures; pronotum, scutellum, clavus and corium densely punctate, with deep dark punctures. Head ventrally impunctate at middle third and heavily punctate laterally with deep dark punctures; pro-, meso-, and metapleura densely punctate with dark punctures; pro-, meso-, and metasternum yellowish white and impunctate; abdominal sterna and genital capsule impunctate, except laterally scattered with dark punctures.

Discussion. Nepiomistus gen. nov., ( Figs. 10 , 23 , 36 ) is related to Darmistus ( Figs. 7 , 20 , 33 ) in having the humeral angles and apex of scutellum unarmed, the total body shorter than 13 mm, antennal segment I the shortest and stout, the apex of the hind femora not surpassing the apex of the abdomen, the clavus with 4 to 5 irregular rows of punctures, the mesosternum with a deep median groove, and the juga in side view globose. In the new genus the apex of the tylus is not sharply deflected below the tips of the juga, the abdominal spiracles are close to the middle third and the connexival borders, antennal segment II is the longest, antennal segment I uniformly stout like a barrel, antennal segments II and III robust, and the juga not quite meeting in front of the tylus. In Darmistus , the apex of the tylus is sharply deflected below the tips of the juga, the abdominal spiracles are close to the middle third and far from the connexival borders, antennal segment IV the longest, antennal segment I slightly stout, and the juga surpassing the tylus and meeting or nearly meeting in front of the tylus.

Etymology. From the Greek, “Nepios”, meaning child or infant, in combination with the generic name Darmistus , referring to the small size of the species; gender masculine.

Figures

FIGURES 56–62. Parameres. 40–41, Bactrocoris plaumanni Kormilev. 42–43, Bactrodosoma parallelum Stål. 44–45, Bactrophya peruviana Breddin. 46–47, Bactrophyamixia slateri Brailovsky. 48–49, Calamocoris erubescens Breddin. 50–51, Cydamus borealis Distant. 52–53, Darmistus subvittatus Stål. 54–55, Esperanza texana Barber. 56, Nepiomistus eximius sp. nov. 57–58, Protenor belfragei Haglund. 50–60, Protenoroides tropicalis (Distant), comb. nov. 61–62, Trachelium alboapicatum Distant.

FIGURES 9–13. Dorsal view. 9, Eudarmistus bicolor Breddin (male). 10, Nepiomistus eximius sp. nov. (male). 11, Protenor belfragei Haglund (female). 12, Protenoroides tropicalis (Distant) (male), comb. nov. 13, Trachelium bicolor Herrich-Schäffer (female).

FIGURES 22–26. Lateral view. 22, Eudarmistus bicolor Breddin (male). 23, Nepiomistus eximius sp. nov. (male). 24, Protenor belfragei Haglund (female). 25, Protenoroides tropicalis (Distant) (male), comb. nov. 26, Trachelium bicolor Herrich-Schäffer (female).

FIGURES 35–39. Lateral view of head and thorax. 35, Eudarmistus bicolor Breddin (male). 36, Nepiomistus eximius sp. nov. (male). 37, Protenor belfragei Haglund (female). 38, Protenoroides tropicalis (Distant) (male), comb. nov. 39, Trachelium bicolor Herrich-Schäffer (female).

FIGURES 5–8. Dorsal view. 5, Calamocoris nigrolimbatus Breddin (male). 6, Cydamus borealis Distant (male). 7, Darmistus subvittatus Stål (female). 8, Esperanza texana Barber (female).

FIGURES 14–21. Lateral view. 14, Bactrocoris plaumanni Kormilev (female). 15, Bactrodosoma parallelum Stål (male). 16, Bactrophya peruviana Breddin (male). 17, Bactrophyamixia bambusicola Brailovsky (female). 18, Calamocoris nigrolimbatus Breddin (male). 19, Cydamus borealis Distant (male). 20, Darmistus subvittatus Stål (female). 21, Esperanza texana Barber (female).

FIGURES 27–34. Lateral view of head and thorax. 27, Bactrocoris plaumanni Kormilev (female). 28, Bactrodosoma parallelum Stål (male). 29, Bactrophya peruviana Breddin (male). 30, Bactrophyamixia bambusicola Brailovsky (female). 31, Calamocoris nigrolimbatus Breddin (male). 32, Cydamus borealis Distant (male). 33, Darmistus subvittatus Stål (female). 34, Esperanza texana Barber (female).