The dung beetle fauna of the Big Bend region of Texas (Coleoptera: Scarabaeidae: Scarabaeinae)
Edmonds, W. D.
Insecta Mundi
2018
2018-07-27
642
1
30
7ZMF9
Schaeffer
Schaeffer
1906
[192,585,747,771]
Insecta
Scarabaeidae
Copris
Animalia
Coleoptera
14
13
Arthropoda
species
arizonensis
McCleve and Kohlmann
2005
[1134,1242,1311,1334]
Mammalia
Muridae
Neotoma
Animalia
Rodentia
14
13
Chordata
genus
Fig. 64–69
Diagnosis.Black, surface lustrous, sides of body more-or-less parallel. Length 13–22 mm. Male ( Fig. 64–66) – Head of large individuals bearing posteriorly curved horn, tip of which approaches bifurcated median process of pronotum; flanks of pronotum each with large, acute, forward-directed, blade-like process separated from apically bifurcated median process by broad, declivitous concavity (in smaller individuals horn and processes progressively attenuated, Fig. 65). Female Fig. 67–69) – Head with short, erect horn, apex widened, scoop-like; pronotum convex except for pair of blunt tubercles, one on each side near anterior angle and separated by thick transverse ridge. Matthews (1961)provides a full re-description of this species.
Big Bend collection sites(altitudinal range: 1375–1800 m). Brewster Co.: [1] Alpine, Sul Ross State Universitycampus, 30°22′04″N 103°38′52″W, 1375 m; [2]* Big Bend National Park, Basin area, 29°16′04″N 103°17′39″W, 1660 m(May); [3]* Alpine, Sunny Glen, 30°22′41″N 103°45′06″W, 1445 m(Jun). Jeff Davis Co.: [1]* Davis Mountains State Park, 30°35′43″N 103°56′5″W, 1540 m(Jun, Aug); [2] * Davis MountainsResort, 30°37′30″N 104°05′30″W, 1800 m(Jun–Aug).
Surface activity.Nocturnal. Habitat.Montane, juniper-pinyon woodlands and arroyos in association with the wood rat, Neotoma albigula(and possibly also N. mexicanaBaird).
Comments.This is by far the rarest dung beetle in the Big Bend. All examined specimens from the region were collected at lights. Copris arizonensisis also known from various locations in the mountains of southeastern Arizona and adjacent areas of southwestern New Mexicoand northern Chihuahua, Mexico[ Matthews 1961; McCleve and Kohlmann 2005; Warner 1990].) Figure 64depicts a specimen from southeastern Arizona (Dragoon Mts., Cochise Co.) exhibiting maximum expression of male armament, which I have not observed in Big Bend specimens ( Fig. 65). The occurrence of C. arizonensisin scattered higher mountainous areas of northern Chihuahuaand the desert southwest is doubtless the result of shrinking and vertical isolation of suitable, high-elevation habitat during post-Pleistocene desertification of the region.
2575871655
[232,1391,1132,1158]
Brewster Co.
30.367779
Sul Ross State University
20
-103.64777
Alpine
14
13
1
2575871674
1660
29.267778
Big Bend National Park
20
-103.29417
Basin area
14
13
1
2575871697
1445
30.378056
Alpine
20
-103.75166
Sunny Glen
14
13
1
2575871686
[232,1387,1228,1254]
Jeff Davis Co.
30.595278
Davis Mountains State Park
20
-103.93472
Davis Mountains State Park
14
13
1
2575871682
Mountains Resort
1800
30.625
Davis Mountains Resort
20
-104.09167
Davis Mountains
14
13
1