A Review of the Mexican Species of Acanthocephala LAPORTE, with Description of One New Species (Heteroptera, Coreidae, Coreinae, Acanthocephalini)1
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© Biologiezentrum Linz/Austria; download unter www.biologiezentrum.at A review of the Mexican species of Acanthocephala LAPORTE, with description of one new species (Heteroptera, Coreidae, Coreinae, Acanthocephalini)1 H. BRAILOVSKY Abstract: The genus Acanthocephala LAPORTE is redescribed, and one new species, A. heissi nov.sp., col- lected in México is described and illustrated; A. thomasi (UHLER) is recorded for the first time in Méx- ico; A. alata (BURMEISTER) is resurrected from synonymy under A. declivis (SAY); A. declivis calderensis DISTANT, A. declivis guatemalena DISTANT, A. declivis panamensis DISTANT, A. declivis thoracicus (DAL- LAS), and A. subalata DISTANT are synonymized under A. alata; A. bispina (WESTWOOD), A. granulosa (DALLAS), A. luctuosa (STÅL), A. nasulus (SAY), and A. obscura (WESTWOOD) are reconfirmed as syn- onyms of A. femorata (FABRICIUS); A. declivis is only distributed in the United States; new records of A. alata, and A. femorata are reported; dorsal habitus illustrations and drawings of pronotum, hind legs, and paramere are provided. A revised key to the four known species of Acanthocephala from México is pre- sented. Key words: Acanthocephala, Coreidae, Heteroptera, Insecta, key to species, México, new records, new species, synonyms. Introduction alatus (HERRICH-SCHAEFFER 1842), A. bispina (WESTWOOD 1842) and A. obscura The genus Acanthocephala LAPORTE is a (WESTWOOD 1842) were synonymyzed un- large complex group of 24 species that oc- der A. femorata. curs through the United States, México, Greater Antilles, Central America, and For this contribution the male and fe- South America (except Chile). The names male genitalia were analyzed, the allometric of the species previously recorded from variability of the body including antennal México were: A. alata (BURMEISTER 1835), and rostral segments was examined, as well A. declivis guatemalena (DISTANT 1881), A. as a careful analysis of the development of femorata (FABRICIUS 1775), A. granulosa the hind legs, the punctures and tubercles of (DALLAS 1852), and A. luctuosa (STÅL the pronotal disc and propleura, the shape 1855). Over the years several conclusions of the humeral angles, and the presence or were reached (see discussion for each absence of a black discoidal spot near the species). Acanthocephala alata was consid- middle third of the pronotal disc. ered a synonym of A. declivis (SAY 1832), and A. granulosa and A. luctuosa were syn- As a result of this analysis, A. alata onyms of A. femorata. Other close species (BURMEISTER) is resurrected from synonymy and varieties like A. declivis guatemalena under A. declivis; A. declivis is only distrib- (DISTANT 1881), A. declivis panamensis (DIS- uted in the United States; A. declivis TANT 1881), A. declivis thoracicus (DALLAS calderensis, A. declivis guatemalena, A. declivis 1852), and A. subalata (DISTANT 1881), thoracicus, and A. subalata are synonymized were synonymized under A. declivis and A. under A. alata (BURMEISTER); A. alata (HER- Denisia 19, zugleich Kataloge 1This paper is written in honor of Ernst Heiss to recognize his career-long accomplishments in systematic entomolo- der OÖ. Landesmuseen gy particularly on the family Aradidae and for the many years of friendship. Neue Serie 50 (2006), 249–268 249 © Biologiezentrum Linz/Austria; download unter www.biologiezentrum.at RICH-SCHAEFFER), A. bispina, A. granulosa, of California, Davis, California, USA); A. luctuosa, A. nasulus, and A. obscura re- UGAG (University of Georgia, Athens, main as synonyms of A. femorata. Acantho- Georgia, USA); UNAM (Coleccion Na- cephala thomasi (UHLER 1872) is recorded for cional de Insectos, Instituto de Biologia, the first time in México, and one new Universidad Nacional Autonoma de Mexi- species (A. heissi nov.sp.) is described. Thus co); USNM (United States National Muse- four species of Mexican Acanthocephala are um of Natural History, Smithsonian Institu- recognized: A. alata BURMEISTER, A. femora- tion, Washington D.C. USA); ZMHB (Zo- ta (FABRICIUS), A. heissi nov.sp., and A. ologisches Museum, Humboldt Universität, thomasi UHLER. Berlin, Germany). Genus Acanthocephala LAPORTE Material and Methods Acanthocephala LAPORTE 1833. Mag. Zool. 1: 29 For this contribution the type specimens Redescription: Body large, broad, stout. of A. alata (ZMHB), A. bispina (OUMNH), Head. Longer than wide or wider than long, A. declivis calderensis (BMNH), A. declivis or as long as wide across eyes, quadrate, non guatemalena (BMNH), A. declivis thoracicus declivant, dorsally flat, parallel sided in (BMNH), A. granulosa (BMNH), A. luctu- front of the eyes; tylus sharply pointed, pro- osa (NRE), A. obscura (OUMNH), and A. jecting beyond juga as a compressed plate, subalata (BMNH) were examined and com- flattened, with apex extending upward as a pared. An exceptionally good and large se- single acute triangular projection; juga api- ries of Mexican specimens of the genus cally globose, not visible from above, de- mostly deposited in the National Insect flexed below antenniferous tubercle; anten- Collection of the Instituto de Biología, UN- niferous tubercle prominent, oblique at AM, has afforded an opportunity for de- apex, situated close together, closely ap- tailed study of this group, and to disentangle pressed to tylus; antennae shorter than total several of the perplexing questions regarding body length; antennal segment I stouter the identity of the species. than segments II to IV, slightly curved out- ward, longer than maximal length of head; Characters typical of the genus are not segments II and III cylindrical, moderately repeated in the individual species descrip- slender; segment IV narrowly fusiform, elon- tions. All measurements are given in mil- gate; antennal segment IV the longest, III limeters. the shortest, and I longer than II; ocelli Institutional abbreviation codes used in barely raised, close to eyes; preocellar pit the material examined sections are: BMNH small; eyes hemispherical, elongate, protu- (The Natural History Museum, London, berant; postocular tubercle weakly exposed England); CAS (California Academy of in dorsal view, nearly smooth with contour Sciences, Golden Gate Park, San Francisco, of eyes; buccula broadly rounded, short, ele- California, USA); CMNH (Carnegie Muse- vated, unarmed, extending to level of mid- um of Natural History, Pittsburgh, Pennsyl- eye; rostrum reaching posterior third of vania, USA); CNCI (Canadian National mesosternum or anterior border of metaster- Collection of Insects, Ottawa, Ontario, num; rostral segment I the longest, III the Canada); CUIC (Cornell University, Insect shortest, and II longer than IV. Thorax. Collection, Ithaca, New York, USA); FSCA Pronotum. Wider than long, wider than (Florida State Collection of Arthropods, hemelytra, trapezoidal, steeply declivant, Gainesville, Florida, USA); INBIO (Institu- with distinct collar; frontal angles blunt; an- to Nacional de Biodiversidad, Heredia, Cos- terolateral margins obliquely sinuate, regu- ta Rica); LACM (Los Angeles County Mu- larly nodulose to spinous; humeral angles seum, California, USA); NRE (Naturhis- expanded; triangular process short to medi- toriska Riksmuseet, Stockholm, Sweden); um size, broad, apically obtuse to subacute, OUMNH (Oxford University Museum of reaching basal third of scutellar disc; pos- Natural History, England); TAMU (Texas A terolateral margins obliquely sinuate; poste- & M University, Insect Collection, College rior margin straight, and smooth; calli al- Station, Texas, USA); UCDA (University most flat, impunctate, separated along mid- 250 © Biologiezentrum Linz/Austria; download unter www.biologiezentrum.at line by narrowly longitudinal depression. and rectangular plica, and short fissure; Prosternum with deep concavity; mesoster- gonocoxae I enlarged antero-posteriorly, in num flat and barely sulcate; metasternum caudal view closed, in lateral view with out- flat, and not sulcate; mesosternum anterior- er border entire, and sinuate; paratergite VI- ly tuberculate between procoxae; meta- II large, square, with visible spiracle; pleural supracoxal spine short; anterior lobe paratergite IX longer than VIII, quadrangu- of metathoracic peritreme reniform; posteri- lar, with inner lobes slightly overlapping. or lobe elongate, not exposed. Legs. Male. Spermatheca. Distal bulb oval to round; Fore and middle femora slender, armed ven- sclerotized duct leading to distal flange trally with two rows of stout spines; outer largely uncoiled (0-3 coils, depending on row stronger and wider than inner row; dor- species); distal flange rectangular, with or sal surface of fore femur smooth; hind femur without spines; duct membranous narrow- incrassate, compressed, armed ventrally ing, proximal to distal flange; proximal with one row of stout, large spines, lateral flange membranous; sclerotized chamber surface densely tuberculate, and provided large, oval, occurring midway between prox- with stout and large to short spines, and dor- imal flange and opening of genital chamber sal surface with two rows of short and stout (Fig. 17). Integument. Head, anterior lobe spines; fore and middle tibiae cylindrical, of pronotal disc, connexivum, prosternum, and sulcate; hind tibiae expanded at outer mesosternum, metasternum, anterior third and inner margin. Female. Fore and middle of propleura, anterior and middle third of femora slender, armed ventrally with one or mesopleura and metapleura, and abdominal two rows of stout spines; dorsal surface of sterna impunctate; posterior lobe of prono- fore