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Dendrocoris Bergroth, 1891

Liotropis Uhler, 1877: 399-400. (junior homonym of Liotropis Fitzinger, 1843, Reptilia)

Dendrocoris Bergroth, 1891: 228. (new name for Liotropis Uhler, 1877)

Atizies Distant, 1893: 456. (syn. by Nelson, 1955)

Type Species: Liotropis: Liotropis humeralis Uhler, 1877, by monotypy. Atizies: ????????????????????.

Tribal Placement: This genus is clearly a member of the tribe Procleticini.

Included Species:

arizonensis Barber
contaminatus Uhler
fruticicola Bergroth
guatemalensis Thomas & Brailovsky
humeralis (Uhler)
inermis Thomas & Brailovsky
maculosus Thomas
nelsoni Thomas & Brailovsky
neomexicanus Nelson
parapini Nelson
pini Montandon
reticulatus Barber
suffultus (Distant)
variegatus Nelson

Comments: Nelson (1955) revised this genus.  Thomas (1984) added a species, then he and Brailovsky (2000) added three more species, and presented a key to all species.

Key to Species of Dendrocoris (from Thomas & Brailovsky, 2000)

1      Vertex of head convex, tumid

2

-       Vertex of head flat

7

   

2(1)  Cicatrices and often neighboring areas of pronotum contrastingly darker the rest of pronotum

3

-       Cicatrices concolorous with dorsum

4

   

3(2)   Connexival segments unicolorous (southwestern U.S. and northern Mexico)

contaminatus (Uhler)

-        Connexival segments with contrasting dark margins (New Mexico to Utah

neomexicanus Nelson
   

4(2)   Anterolateral pronotal margin thick; head elongate (southwestern U.S.)

parapini Nelson

-        Anterolateral margins of pronotum thin, compressed; head length about equal to width

5

 

 

5(4)   Head, pronotum, and pleura devoid of dark punctations (western Canada to Baja California)

pini Montandon

-        Head, pronotum, and pleura with numerous dark punctations

6

 

 

6(5)   Lateral flange of pygophoral margin acuminate and notched (southern Mexico, Guatemala)

guatemalensis Thomas & Brailovsky

-       Lateral flange of pygophoral margin obtuse, lacking notch (northern Mexico, southwestern U.S.)

nelsoni Thomas & Brailovsky

 

 

7(1)  Venation of hemelytral membrane reticulate (southwestern U.S. and northwestern Mexico)

reticulatus Barber

-       Venation of hemelytral membrane simple

8

 

 

8(7)  Legs with conspicuous black spots (southwestern Mexico)

maculosus Thomas

-       Legs immaculate

9

 

 

9(8)   Spiracles surrounded by a broad dark spot (southeastern U.S.)

fruticicola (Bergroth)

-        Spiracles concolorous with venter or narrowly margined in black

10

 

 

10(9) Base of abdomen without tubercle (a weak prominence in some females)

11

-        Base of abdomen with distinct, forwardly directed tubercle

13

 

 

11(10) Margins of juga denticulate (southern Mexico)

variegatus Nelson (part)

-          Margins of juga without teeth

12

 

 

12(11) Pygophore with pair of small, black teeth at base of medial emargination (southern Mexico)

inermis Thomas & Brailovsky

-          Pygophore without black teeth on posterior surface (most of U.S., northern Mexico)

humeralis (Uhler) (part)

 

 

13(10) Head distinctly wider than long (southern Mexico)

variegatus Nelson (part)

-          Head longer than wide or about equal to length

14

 

 

14(13) Anterolateral pronotal margins distinctly paler than pronotal disc (most of U.S. and northern Mexico)

humeralis (Uhler) (part)

-          Anterolateral pronotal margins darkened or concolorous with disc

15

 

 

15(14) Anterolateral pronotal margins nearly straight; spiracles at most thinly ringed with black (southwestern U.S. and northern Mexico)

arizonensis Barber

-         Anterolateral pronotal margins distinctly concave; spiracles usually black (central Mexico)

suffultus (Distant)

Dendrocoris sp.
photo courtesy of larvalbug
 

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David A. Rider
Professor of Entomology
North Dakota State University
202 Hultz Hall
Fargo, ND 58105
E-Mail: David.Rider@ndsu.edu

 
Published by the Department of Entomology 


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