Copris arizonensis Schaeffer,

Edmonds, W. D., 2018, The dung beetle fauna of the Big Bend region of Texas (Coleoptera: Scarabaeidae: Scarabaeinae), Insecta Mundi 642, pp. 1-30: 13

publication ID

http://doi.org/10.5281/zenodo.3708186

publication LSID

lsid:zoobank.org:pub:55CCB217-771C-499D-9110-36F143C375C5

DOI

http://doi.org/10.5281/zenodo.3717146

persistent identifier

http://treatment.plazi.org/id/03E087E4-FFFD-FF9C-FF24-9C9FFDA9F979

treatment provided by

Felipe

scientific name

Copris arizonensis Schaeffer
status

 

Copris arizonensis Schaeffer 

Fig. 64–69View Figures 60–69

Diagnosis. Black, surface lustrous, sides of body more-or-less parallel. Length 13–22 mm. Male ( Fig. 64–66View Figures 60–69) – 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. 65View Figures 60–69). Female Fig. 67–69View Figures 60–69) – 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 University campus, 30°22′04″N 103°38′52″W, 1375 mGoogleMaps  ; [2] * Big Bend National Park , Basin area, 29°16′04″N 103°17′39″W, 1660 m (May)GoogleMaps  ; [3] * Alpine , Sunny Glen, 30°22′41″N 103°45′06″W, 1445 m (Jun)GoogleMaps  .

Jeff Davis Co.: [1] * Davis Mountains State Park, 30°35′43″N 103°56′5″W, 1540 m (Jun, Aug)GoogleMaps  ; [2] * Davis Mountains Resort , 30°37′30″N 104°05′30″W, 1800 m (Jun–Aug)GoogleMaps  .

Collection method(s). a) UV light trap; b) *direct capture beneath nests of Neotoma  .

Surface activity. Nocturnal.

Habitat. Montane, juniper-pinyon woodlands and arroyos in association with the wood rat, Neotoma albigula  (and possibly also N. mexicana Baird  ).

Comments. This is by far the rarest dung beetle in the Big Bend. All examined specimens from the region were collected at lights. Copris arizonensis  is also known from various locations in the mountains of southeastern Arizona and adjacent areas of southwestern New Mexico and northern Chihuahua, Mexico [ Matthews 1961; McCleve and Kohlmann 2005; Warner 1990].) Figure 64View Figures 60–69 depicts 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. 65View Figures 60–69). The occurrence of C. arizonensis  in scattered higher mountainous areas of northern Chihuahua and the desert southwest is doubtless the result of shrinking and vertical isolation of suitable, high-elevation habitat during post-Pleistocene desertification of the region.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Scarabaeidae

Genus

Copris