A second species of the genus Nisoscolopocerus Barber 1928, from North America (Heteroptera: Coreidae: Coreinae: Coreini).
Key words: Heteroptera, Coreidae, Coreini, Nisoscolopocerus, new species, Mexico.
The genus Nisoscolopocerus Barber, 1928, belonging to the tribe Coreini (Heteroptera: Coreidae), is found in arid and semi-arid regions in Canada (Alberta) and the United States (Colorado, New Mexico and Nebraska). Prior to this study, only the type species, N. apiculatus Barber, was known (Froeschner, 1988; Packauskas, 2010).
In this contribution, a second species from northern Mexico (Zacatecas) is described, which increases the distributional range of the genus. The genus and the type species are redescribed; dorsal photographs of the adult, head, and pronotum, illustrations of parameres, and a key to the known species are provided.
MATERIALS AND METHODS
All measurements are given in millimeters. Acronym used: UNAM (Coleccibn Entomoldgica, Instituto de Biologia, Universidad Nacional Autonoma de Mexico).
KEY TO NISOSCOLOPOCERUS SPECIES
1. Antennal segment I broad, maximum length shorter than 1.30, and densely clothed with hispid tubercles (Fig. 1B); antennal segment IV shorter than 0.90; maximum width of abdomen less than 4.20; femora densely granulate, with hispid tubercles (Fig. 3B) schuhi, new species
--Antennal segment I slender, elongate, longer than 1.75, sparsely clothed with hispid tubercles (Fig. 1A); antennal segment IV longer than 1.00; maximum width of abdomen wider than 4.60; femora not or sparsely granulate, without hispid tubercles (Fig. 3A) apiculatus Barber
Nisoscolopocerus Barber, 1928:25-26.
TYPE SPECIES: Nisoscolopocerus apiculatus Barber, 1928.
REDESCR1PTION: Body surface dull, roughly granulate and punctate. Head: wider than long, nearly quadrate, slightly shorter than maximum length of pronotum; tylus weakly raised, extending anteriorly to and laterally higher than jugae, and armed with six to eight hispid tubercles; jugae unarmed; antennal segment I broad, thickest, clothed with hispid tubercles, and narrowed at base, segment II robust cylindrical, with rigid, semidecumbent bristle-like setae, segment III robust, cylindrical, with rigid, semidecumbent bristle-setae hairs, with a crown of hispid tubercles apically, IV pyriform, acuminate at apex, finely pilose, with rigid, semidecumbent bristle-like setae; antenniferous tubercle prominent, porrect, diverging anteriorly; eyes not prominent; ocelli tumid, near eyes, placed on a line drawn across posterior margin of eyes; lateral margin between ocellus and eye beset with four to six hispid tubercles; anteocular lateral margin a slightly over twice as long as postocular margin; frontal area and vertex covered with several hispid tubercles; postocular tubercle protuberant beset with hispid tubercles; buccula raised, rectangular, short, not projecting beyond anterior margin of eyes, entire, unarmed; labium reaching posterior border of abdominal sternite III; labial segment I the longest, III shortest, and II longer than IV; labial segment I extends to posterior line of eyes. Legs: Cylindrical, unarmed, with or without hispid tubercles; metacoxae widely separated, space between them about one-half the distance of coxae; coxae placed near lateral margin of pleurae; tibiae obsoletely sulcate; tarsi with basal segment subequal to second and third segments taken together. Abdomen: oval in outline; connexiva strongly flaring, much exposed beyond margin of corium; posterior margins of tergal segments III and IV strongly convex, arcuate
Macropterous form: Thorax: Pronotum wider than long, with hispid tubercles, subquadrate, flattened, not declivous; frontal angles rounded, not projecting; humeral angles obtuse, not exposed; collar indistinctly depressed, not separated by a distinct incised line; middle third of pronotal disk with a broad longitudinal sulcus; anterolateral margins obliquely straight, roughly granulate; posterior margin concavely arcuate before base of scutellum; prosternum depressed; meso and metasternum sulcate; anterior lobe of metathoracic peritreme weakly reniform, posterior lobe subacute, raised; evaporative area short; posterior margin of metapleura with outer third obtusely rounded, and slightly raised. Seutellum: raised, slightly longer than wide, or wider than long or subequal, nearly equal to the length of claval commissure; disk with evident longitudinal median carina, and recumbent setigerous tubercles. Hemelytra: Clavus wide, claval vein raised, and surface with small bristle-like setae; claval commissure slightly longer than scutellum; costal margin of corium gently rounded from base to apex; veins strongly raised, surface sparsely covered with hispid tubercles; hemelytral membrane almost reaching apex of abdomen, with numerous anastomosing veins; angles not armed; spiracles set medial on segments, closer to side margins than to either segmental border.
Brachypterous form: Thorax: Pronotum wider than long; anterolateral margins nearly parallel sided; disk longitudinally depressed through the middle with weak carina which ends before the posterior margin. Scutellum: flatter than in macropterous condition, somewhat raised posteriorly; disk with evident longitudinal median carina, with recumbent setigerous tubercles. Hemelytra" Clavus and corium fused into a coriaceous pad, meeting each other along midline for almost the entire length; hemelytral membrane reduced to small pads, reaching third or fourth abdominal tergum.
Male: GENITAL CAPSULE: nearly circular in outline, slightly sinuate at middle third. Paramere: Fig. 2A D.
Female: GENITAL CAPSULE: abdominal sternite VII with plica triangular, wide, reaching anterior border of sternite; fissura not clearly evident; gonocoxae I squarish, enlarged dorso-ventrally; paratergite VIII nearly triangular, apically rounded; paratergite IX square, medium-sized, apically rounded.
DISCUSSION: Nisoscolopocerus Barber is more closely related to Scolopocerus Uhler than any other known Coreini. Both genera can be recognized by six characters: 1) hind femora unarmed; 2) antennal segments II and III cylindrical, not sulcate or dilated; 3) female genital plates short to medium-sized, never laminate; 4) mesopleura and metapleura without creamy-yellow hardened protuberance; 5) antenniferous tubercle armed; 6) antennal segment IV pyriform.
Nisoscolopocerus can be distinguished by having antennal segment I longer than total length of head, abdomen oval in outline, connexivum strongly exposed beyond margin of corium, and general surface of the body clothed with hispid tubercles. In Scolopocerus, antennal segment I is shorter than the total length of head; the abdomen is not dilated, but almost parallel-sided; the connexivum is not conspicuously projecting beyond corium; and the surface lacks hispid tubercles.
Nisoscolopocerus apiculatus Barber Figures 1A, 2A-B, 3A
Nisoscolopocerus apiculatus Barber, 1928: 26-28.
DIAGNOSIS: Recognized by having the femora without hispid tubercles, and not or sparsely granulate, and with antennal segment I slender, elongate, and sparsely clothed with hispid tubercles.
REDESCRIPTION: DORSAL COLORATION: Ground color, including antennal segments I to III, brown to dark brownish orange; antennal segment IV dark reddish brown with apical third paler; head lateral to tylus, lateral margin of scutellar disk, and apical margin of hemelytra dark reddish brown. VENTRAL COLORATION: Ground color pale brownish orange; acetabulae, posterior margin of metapleura, and anterior and posterior lobe of metathoracic peritreme, pale yellowish to yellowish orange; rostral segments I to IV dark reddish brown; coxae and trochanters reddish brown with pale brownish orange marks; femora and tibiae pale yellowish orange with dark to pale brown spots; tarsi reddish brown; lateral margins of abdominal sterna III to VII with irregular black spot. STRUCTURE: Antennal segment I elongate, slender, scattered with hispid tubercles, and clearly longer than maximum length of head (Fig. 1A); antennal segment IV longer than 1.00; hemelytral membrane in the macropterous form almost reaching apex of last abdominal segment, in brachypterous form reaching posterior border of abdominal segment III or anterior border of IV; femora not granulate, sparsely clothed with semidecumbent, silvery, bristle-like setae; maximum width of abdomen wider than 4.60. Paramere. Fig. 2A, B.
MEASUREMENTS (N = 2): Male and Female (in parentheses) brachypterous form: Head length 1.27-1.28 [male] (1.33 [female]); width across eyes 1.40 [male] (1.40 [female]); interocular space 0.99 1.00 [male] (0.96 [female]); interocellar space 0. 58-0.60 [male] (0.56 [female]); preocular distance 0.84-0.85 [male] (0.92 [female]). Length of antennal segments: I, 1.79-1.80 [male] (1.84 [female]); II, 1.08-1.09 [male] (1.16 [female]); III, 1.08-1.11 [male] (1.24 [female]); IV, 1.00-1.02 [male] (1.20 [female]). Pronotum: Total length 1.64-1.65 [male] (1.79 [female]); maximum width across humeral angles 1.76-1.77 [male] (2.12 [female]). Scutellar length 0.56-0.58 [male] (0.72 [female]); width 0.56-0.58 [male] (0.64 [female]). Maximum width of abdomen 4.764.78 (7 (5.08 [female]). Total body length 8.75-8.78 [male] (9.63 [female]).
DISTRIBUTION: CANADA: Alberta. USA: Colorado, New Mexico and Nebraska (Froeschner, 1988).
SPECIMENS EXAMINED: Only brachypterous form: USA: Colorado: El Paso Co.; Peyton Road, 5,835'-5,875', Pitfall Trap at Station 1, 7, and 15, 12 Oct. 1963, 24 Jul. 1964, B. H. Banta, 2 [male][male], 1 [female], (UNAM); Black Forest, 7,195', Pitfall Trap, at Station 17, 17 Oct. 1964, B. H. Banta, 1 [female] (UNAM).
Nisoseolopoceras sehuhi, new species
Figures 1B, 2C-D, 3B
HOLOTYPE: Male: MEXICO: Zaeateeas: Villa de Cos: Banon, 2,080 m, 23[degrees]09'55.6"N-102[degrees]31'5.0"W, 4 Aug 2010, V. Lizardo (brachypterous form) (UNAM).
DIAGNOSIS: Recognized by having the femora densely granulate, with hispid tubercles, and antennal segment I broad.
DESCRIPTION: Male: COLORATION: ground color including antennal segments I to III pale brown; antennal segment IV dark reddish brown with apical third paler; rostral segments I to IV reddish brown; anterior half of anterolateral margins of pronotum reddish brown; anterior and posterior lobe of metathoracic peritreme pale yellow; posterior margin of acetabulae, coxae and trochanters reddish brown with brownish orange marks; femora pale brown with reddish brown hispid tubercles; tibiae pale brown with reddish brown marks; tarsi reddish brown with dark brownish orange irregular marks; apical margin of corium ad some veins dark reddish brown; hemelytral membrane translucent, veins brown. STRUCTURE: antennal segment I broad, thickest, densely clothed with hispid tubercles, shorter than maximum length in brachypterous form, subequal to maximum length of head in the macropterous form (Fig. 1B); antennal segment IV shorter than 0.90; hemelytral membrane in macropterous form almost reaching apex of last abdominal segment, in brachypterous form reaching the anterior border of abdominal segment IV; femora densely granulate, with hispid tubercles and dense semidecumbent to erect silvery, bristle-like setae; tibiae with dense semidecumbent to erect silvery, bristle-like setae; maximum width of abdomen less than 4.20. Paramere: Fig. 2C, D.
MEASUREMENTS (N = 2): Male holotype in parentheses. Brachypterous form: Head length 1.26 (1.28); width across eyes 1.30 (1.32); interocular space 0.90 (0.88); interocellar space 0.78 (0.78); preocular distance 0.83 (0.84). Length of antennal segments: I, 1.16 (1.16); II, 0.77 (0.76); III, 0.79 (0.80); IV, 0.87 (0.88). Pronotum: Total length 1.25 (1.26); maximum width across humeral angles 1.74 (1.74). Scutellar length 0.65 (0.65); width 0.68 (0.68). Maximum width of abdomen 3.89 (3.92). Total body length 7.42 (7.50). Macropterous form: Head length 1.20; width across eyes 1.32; interocular space 0.88; interocellar space 0.56; preocular distance 0.82. Length of antennal segments: I, 1.22; II, 0.92; III, 0.92; IV, 0.88. Pronotum: Total length 1.64; maximum width across humeral angles 2.72. Scutellar length 0.84; width 0.96. Maximum width of abdomen 4.12. Total body length 8.08.
SPECIMENS EXAMINED: PARATYPES: MEXICO: Villa de Cos: Banon, 2,080 m, 23[degrees]09'55.6"N-102[degrees]31'5.0"W, 2 Aug 2010, 4 Aug 2010, 14-16 Sept 2010 (brachypterous form) 4 [[male]male] (UNAM); Zacatecas: Villa de Cos: San Andres, 2,094 m, 23[degrees]16'41.4"N-102[degrees]22'33.6"W, 14 Sept 2010, V. Lizardo 2 [male][male] (1 brachypterous, 1 macropterous) (UNAM).
BIOLOGY: This species is found in semi-arid regions of northern Mexico, and was collected in dung-baited pit-fall traps in Opuntia and Yucca scrub and grasslands.
ETYMOLOGY: This species is named in honor of Dr. Randall Toby Schuh for his outstanding contributions to the knowledge of the true bugs, and for his inestimable contributions to the Miridae and Leptopodidae of the world.
I thank Viridiana Lizardo (UNAM) for collecting and making available the material studied and Ernesto Barrera (UNAM) for the illustrations.
Barber, H. G. 1928. A new genus and species of Coreidae from the Western States (Hemiptera-Heteroptera). Journal New York Entomological Society 36: 25-28.
Brailovsky, H. 1990. Revision del complejo "Althos" (Hemiptera-Hetertoptera-Coreidae). Universidad Nacional Autonoma de Mexico. Publicaciones Especiales 5:1-156.
Froeschner, R. C. 1988. Family Coreidae, pp. 6942 in T. J. Henry and R. C. Froeschner (eds.), Catalog of the Heteroptera or True Bugs, of Canada and the Continental United States. E. J. Brill. Leiden and New York, 958 pp.
Packauskas, R. 2010. Catalog of the Coreidae, or Leaf-Footed bugs, of the New World. Fort Hays Studies, Fourth Series, Number 5, 270 pages.
Departamento de Zoologia, Instituto de Biologia, Apdo Postal No. 70153, Mexico 04510 D. F., Mexico. Email address: email@example.com
Please note: Illustration(s) are not available due to copyright restrictions.
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|Date:||Jan 1, 2012|
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