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Review of the Genus Dendrocoris Bergroth with Descriptions of New Species (Pentatomidae: Heteroptera)

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Review of the Genus Dendrocoris Bergroth with Descriptions of New Species (Pentatomidae: Heteroptera) University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Center for Systematic Entomology, Gainesville, Insecta Mundi Florida March 1999 Review of the genus Dendrocoris Bergroth with descriptions of new species (Pentatomidae: Heteroptera) Donald B. Thomas USDA-ARS Harry Brailovsky Universidad Nacional Autonoma de Mexico Follow this and additional works at: https://digitalcommons.unl.edu/insectamundi Part of the Entomology Commons Thomas, Donald B. and Brailovsky, Harry, "Review of the genus Dendrocoris Bergroth with descriptions of new species (Pentatomidae: Heteroptera)" (1999). Insecta Mundi. 320. https://digitalcommons.unl.edu/insectamundi/320 This Article is brought to you for free and open access by the Center for Systematic Entomology, Gainesville, Florida at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Insecta Mundi by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. INSECTA MUNDI, Vol. 13, No. 1-2, March-June, 1999 1 Review of the genus Dendrocoris Bergroth with descriptions of new species (Pentatomidae: Heteroptera) Donald B. Thomas USDA-ARS, SubtropicalAgriculture ResearchLaboratory 2301 S. International Blvd, Weslaco, TX 78596 and Harry Brailovsky Instituto de Biologia, Universidad Nacionhl Autonoma de MQxico Apartado Postal 70153, Mbxico D.F. 045 10,MQxico Abstract: The procleticine genus Dendrocoris Bergroth is revised with the descriptions of three new species from the United States, D. nelsoni, Mexico, D. inermis, and Guatemala, D. guatemalensis. A diagnosis is provided for each species with notes on distribution and host plants. A key is providedfor determination ofall fourteen species. Key Words: Pentatomidae, Procleticini, stink bug, taxonomy. Introduction undescribed species of Dendrocoris and many spec- imens of described species which were not previous- The genus Dendrocoris Bergroth is a member of ly recorded from MQxico. In the present work we the tribe Procleticini of the nominate subfamily of the review the species of Dendrocoris including new Pentatomidae. These are small, cryptically colored information on distributions and host plants and stink bugs which are most commonly encountered by have modified Nelson's key to include the new beating the foliage of pine or oak. The form of the body species and those described since his revision. is generally depressed and rounded to oval in outline. Its salient characteristics include the presence of a Materials and Methods tubercle at the base of the abdomen (absent in some males), scent gland ostioles with elongate rugae, All drawings, except for the habitus drawing of bucculae truncate posteriorly, meso- and metaster- D. inermis (Fig. I), were tracings using a Wild M-5 num concave, unarmed, juga contiguous before the microscope with camera lucida at 25x or 50x. Mea- tylus, and the female gonocoxites reducedin size. The surements were made with a graduatedocular at lox genus can be definitively determined by using the key magnification using a Zeiss SV8 dissecting micro- to the Procleticini by Rider (1994). scope. All measurements are from the holotype unless The type species of Dendrocoris is Liotropis otherwise indicated. Anatomical nomenclature fol- humeralisuhler 1877,by monotypy. Bergroth (1891) lows Torre-Bueno (1989). Type specimens are deposit- proposed Dendrocoris as a replacement name be- ed at the collections of the Universidad Nacional cause Liotropis was preoccupied. Barber (1911) and Autonoma de MQxico(UNAM), Texas A&M Universi- Torre-Bueno (1939) provided keys to the known spe- ty (TAMU) or the personal collections of Donald B. cies. The genus was revised by Nelson (1955) who Thomas (DBT), Joseph E. Eger (EGER) andDavid A. provided detailed descriptions for each species and Rider (DAR). The acronyms are used to designate illustrations of the genitalia. In subsequent articles depositions in the text. Label data is reported with Nelson (1957) and Thomas (1984) each added new label (a) on the pin nearest the specimen. species. In recent years the entomological collections of the Universidad Nacional Autonoma de MQxicohas grown to include anextensive amount ofheteropteran Key to the species of Dendrocoris Bergroth material, mainly from the Republic of MQxico.Among this material we have discovered three additional 1. Vertex of head tumid ........................................ 2 1'. Vertex of head flat ............................................ 7 2 Volume 13, No. 1-2, March-June, 1999, INSECTA MUNDI Cicatrices contrastingly darkened ................... 3 13(10f). Head distinctly wider than long (Fig. 3)(south- Cicatrices concolorous with dorsum ................ 4 ern Mexico) ............ uariegatus Nelson (pars) 13'. Head longer than wide or about equal to length Connexival segments unicolorous (southwestern U.S. and northern Mexico ............................... .....................................contaminatus (Uhler) 14(13). Anterolateral pronotal margin distinctly paler Connexival segments with contrasting dark mar- than pronotal disc (most of United States and gins (New Mexico to Utah) ............................. northern Mexico) .............. huineralis (Uhler) ......................................neomexicanus Nelson 14'. Anterolateral pronotal margin darkened or con- colorous with disc ....................................... 15 Anterolateral pronotal margin thick; head elon- gate (fig. 2) (southwestern U.S.) .................... 15(14'). Anterolateral pronotal margin nearly straight; .............................................. parapini Nelson spiracles usually pale; (southwestern U.S. and Anterolateral margins of pronotum thin, com- northern Mexico) ............. arizonensis Barber pressed; head length about equal to width (fig. 15'. Anterolateral pronotal margin distinctly con- cave; spiracles usually black (central Mexico) ........................................... suffultus (Distant) Head, pronotum, and pleura devoid of dark punc- tations (western Canada to Baja California) ............................................... inMontandon Account of Species Head, pronotum, and pleura with numerous dark punctations ...........................................6 Dendrocoris contaminatus (Uhler 1897) Lateral flange of pygophoral margin acuminate and notched (southern Mexico, Guatemala) . Diagnosis. Vertex of head tumid. Color yellow .......................................guatemalensis n. sp. tan to bricli red with cicatrices contrastingly dark Lateral flange of pygophoral margin obtuse, brown, the dark color often spreading to the antero- lacking notch (northern Mexico, southwest- lateral pronotal margin. Laterotergites of connexi- ern U.S.) .....................................nelsoni n. sp. vum unicolorous. Apices of juga contiguous or near- ly so. Anterolateral pronotal margins in dorsal view Venation of hemelytral membrane reticulate slightly sinuate. Humeri not produced. Legs im- (southwestern U.S. and northwestern Mexi- maculate. Abdominal tubercle prominent, present co) ...................................... r-eticulatus Barber Venation of hemelytral membrane simple ......8 in both sexes. Venation of hemelytral membrane simple or furcate, not reticulate. Male pygophore Legs with conspicuous black spots (southwest- lacks teeth on posterior aspect near medial emar- ern Mexico) ...................... maculosus Thomas gination. Legs immaculate ...............................................9 Distribution. USA: Arizona, California, Ne- vada, New Mexico, Texas, Utah. MEXICO: Baja Spiracles surrounded by a broad dark spot (south- California, Baja California Sur, Coahuila, Duran- eastern U.S.) ................ fruticicola (Bergroth) go, Nuevo Leon, San Luis Potosi, Sonora. Spiracles concolorous with venter or narrowly Remarks. This species is restricted to creosote margined in black ....................................... 10 bush, Larrea tridentata Sessit & Mocifio. The Base of abdomen without tubercle (a weak prom- darkened cicatrices are characteristic, though it inence in some females) .............................11 can be confused with D. neomexicanus Nelson. Base of abdomen with distinct, forwardly direct- ed tubercle ..................................................13 Dendrocoris neomexicanus Nelson 1955 Margins of juga denticulate (southern Mexico) Diagnosis. Vertex of head tumid. Dorsal color ................................ variegatus Nelson (pars) tan to pale yellow with numerous dark punctations Margins of juga without teeth .......................12 on the base of the head around the ocelli. The Pygophore with pair of small, black, teeth atbase pronotal cicatrices are contrastingly dark brown or of medial emargination (Fig. 5) (southernMex- black. The connexival laterotergites are pale with ico) .............................................inermis n. sp. black margins. Juga contiguous before tylus or Pygophore without black teeth on posterior sur- nearly so. Anterolateral pronotal margins arcu- face (United States, northern Mexico) ........... ately concave in dorsal view. Humeri not promi- ...........................................hunzeralis (Uhler) INSECTA MUNDI, Vol. 13, No. 1-2, March-June, 1999 3 nent. Legs immaculate. Venation of hemelytral membrane simple or furcate, not reticulate. Ab- dominal tubercle present in both sexes. Male pygophore without black teeth on posterior as- pect. Distribution. USA: New Mexico, Utah. Remarks. Our colleague David Rider exam- ined Nelson's type specimen and provided us with a homotype
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