Orizabus dechambrei Morón, Tapia and Aragón, 2003
publication ID |
https://doi.org/ 10.5281/zenodo.157135 |
DOI |
https://doi.org/10.5281/zenodo.6277016 |
persistent identifier |
https://treatment.plazi.org/id/03D287E6-FFD8-8C59-FEC7-FB83FA8F8EBC |
treatment provided by |
Plazi |
scientific name |
Orizabus dechambrei Morón, Tapia and Aragón |
status |
sp. nov. |
Orizabus dechambrei Morón, Tapia and Aragón , sp. nov. ( Figs. 1122 View FIGURES 11 22 )
Diagnosis. This species is distinguished from other Orizabus species by the following combination of characters: head with transverse clypeal carina sinuate, a small or weak tubercle on frontoclypeal suture, antennae with 10 segments, pronotum with large anterior tubercle and wide depression, elytra weakly striate, male foretibia without teeth; female foretibia tridentate, female pygidium widely convex and without keel or depressions.
Description. Holotype. Male: Length 26.8 mm; width across humeri 13.9 mm. Color shiny dark brown dorsally and ventrally, nearly black on pronotum and slightly reddish on elytra. Head: clypeus with surface transversely rugopunctate, apex broadly rounded, transverse clypeal carina prominent, sinuate. Frons moderately convex, densely rugopunctate, with small, weak, rounded tubercle on anterior margin at middle of carinate frontoclypeal suture. Interocular width equals 4.8 transverse eye diameters ( Figs. 1112, 18 View FIGURES 11 22 ). Antenna with 10 segments, club 1.4 times longer than stem. Pronotum: surface shiny, anterior half of disc densely punctate and aciculate, punctures deep and round, with anterior angles rugopunctate; posterior half of disc only aciculate near weakly furrowed midline, punctation progressively dense toward sides. Anterior margin with large, hornlike tubercle and wide, deep depression behind tubercle ( Fig. 12 View FIGURES 11 22 ). Posterior margin with weak marginal line, line not interrupted at middle. Elytra: surface aciculate, with 3 weakly impressed striae between suture and lateral edge of humeral umbone, plus 1 oblique stria near inner side of humeral umbone, sides without striae. Intervals inpunctate. Pygidium : surface strongly convex in lateral view, finely rugopunctate at basal angles; disc sparsely punctate, weakly aciculate, nearly smooth, with deep transverse pit before apex. Ve n te r: prosternal process large, apex rounded, densely clothed with long, ferruginous setae. Legs: foretibia without teeth, bladelike ( Fig. 14 View FIGURES 11 22 ). Hindtibia with 2 distinct, submedial, transverse carinae ( Fig. 16 View FIGURES 11 22 ). Parameres ( Figs. 2021 View FIGURES 11 22 ): Apical portion of each paramere abruptly expanded, without lateral tooth or accesory blades.
Allotype. Length 27.1 mm; width across humeri 13.5 mm. As holotype except as follow: Head: frontoclypeal suture and frontal tubercle slightly larger. Pronotum: widely convex, without anterior tubercle and depression ( Fig. 17 View FIGURES 11 22 ); anterior half of disc densely punctate; posterior half of disc aciculate at middle, with deep punctures near laterobasal borders. Pygidium : surface slightly convex, without preapical transverse pit. Legs: foretibia nearly tridentate ( Fig. 15 View FIGURES 11 22 ). Genital plates ( Fig. 22 View FIGURES 11 22 ): basal plates subquadrate, without setae. Distal plates widely convex, with apical border widely curved, with many setae.
Variation (1 paratype). Length 24.2 mm. Humeral width 13.1 mm. Male: Head: clypeus with transverse clypeal carina prominent, deeply sinuate ( Fig. 19 View FIGURES 11 22 ). Pronotum: anterior margin with tubercle and fovea smaller ( Fig. 13 View FIGURES 11 22 ). Elytra: with 8 weak impressed rows of small, round punctures between suture and lateral edge of humeral umbone, plus 1 short row at base of second interval, sides with 4 irregular rows; 1 oblique stria near inner side of humeral umbone; intervals shiny, aciculate. Pygidium less convex.
Material examined (3 specimens). Holotype male: MEXICO. Guerrero: Rancho Omiltemi, 5 June 1985, Col. A. Luis ( MXAL / IEXA). Allotype female: Guerrero, Tlacotepec, 6 km W Puerto del Gallo, El Iris, 2200 m, 4 August 1983, Col. A. Luis ( MXAL / IEXA). Paratype male; Guerrero: Omiltemi, 5 July 1985, Col. I. Vargas ( MXAL / IEXA).
Habitat. The specimens were collected on the soil in pineoak or oak forests at 2200 2300 m elevation.
Geographical distribution ( Fig. 10 View FIGURE 10 ). This species is known only from Parque Ecológico Estatal Omiltemil and the surrounding areas near Chilpancingo, Guerrero, Mexico.
Taxonomic relationships. Orizabus dechambrei is in the group of species whose males have a pronotal tubercle and pronotal depression and have the foretibia lacking teeth. This group also includes O. tuberculatus Prell and O. clunalis LeConte. The males of O. dechambrei are easily separated from the other species in this group by the weak frontal tubercle, pronotum with wide and deep depression behind the anterior large, hornlike tubercle, elytra weakly striate or nearly smooth, and the apex of the parameres abruptly expanded, without lateral tubercles.
Etymology. This species is named after RogerPaul Dechambre in recognition of his extensive work done on the Dynastinae of the world.
Key to species of Orizabus Fairmaire (Modified from DelgadoCastillo & Deloya, 1990)
1 Pronotum with tubercle and depression on anterior half ............................................................ 2
Pronotum without tubercle or depression on anterior half.......................................................... 6
2 Frons with tubercle in middle of anterior border. External margin of foretibia without teeth or tridentate. Body length 2127 mm .............................................................................................. 3
Frons with straight transverse carina. External margin of foretibia bisinuate. Body length 1419
mm. Mexico................................................................................ O. isodonoides Fairmaire, male 3. External margin of foretibia without teeth, without emarginations. Frontal tubercle weak, short, rounded ....................................................................................................................................... 4
External border of foretibia tridentate. Frontal tubercle large, erect, with rounded apex. Mexico............................................................................................................ O. subaziro Ratcliffe, male
4 Clypeal carina straight. Apical third of parameres with 2 lateral tubercles. Mexico, Guatemala and Nicaragua.................................................................................... O. tuberculatus Prell, male
Clypeal carina sinuate, forming 2 rounded teeth. Apical third of parameres without tubercles. 5
5 Pronotum with narrow, deep depression behind small, anterior tubercle. Elytra deeply punctatestriate. Body length 2126 mm. U.S.A. and Mexico................... O. clunalis LeConte, male
Pronotum with wide, shallow depression behind large, anterior hornlike tubercle. Elytra weakly striate or nearly smooth. Body length 2427 mm. Southern Mexico............................... ........................................................................................................ O. dechambrei sp. nov. male
6 Frons with transverse carina. External margin of foretibia tridentate. Body length 1419 mm. Northwestern and central Mexico............................................ O. isodonoides Fairmaire, female
Frons with tubercle on middle of anterior border. External margin of foretibia without teeth, bisinuate, or tridentate. Body length 1428 mm ......................................................................... 7
7 Antenna 9segmented. Body length 1518 mm. Central Mexico................................................. ........................................................................................ O. vulcanicus sp. nov. male and female
Antenna 10segmented. Body length 1428 mm ....................................................................... 8
8 External margin of foretibia without teeth .................................................................................. 9
External margin of foretibia bisinuate or tridentate .................................................................. 11
9 Transverse clypeal carina straight. Mexico, Guatemala and Nicaragua....................................... ........................................................................................................ O. tuberculatus Prell , female
Transverse clypeal carina sinuate, bidentate ............................................................................ 10
10 Elytra with second interval smooth. Parameres with lateral carina on apical third, the apex notched and glabrous. Body length 2024 mm. Mexico.... O. rubricollis Prell, male and female
Elytra with second interval with scattered punctures near apical callus. Parameres without lateral carina on apical third, the apex entire and with long setae. Body length 1519 mm. Southern Mexico............................................ O. cuernavacensis DelgadoCastillo and Deloya , male
11 Posterolateral area of pronotal disc sparsely punctate ............................................................. 12
Posterolateral area of pronotal disc densely punctate ............................................................... 13
12 Apex of inner spur of hind tibia curved. Parameres short and widely bifurcate. Pygidium of female with deep preapical pit. Body length 1618 mm. Hidalgo, Mexico.................................. ...................................................................................... O. endrodianus Morón, male and female
Apex of inner spur of hind tibia straight. Parameres long and narrowed, weakly notched at apex. Pygidium of female without preapical pit. Body length 1619 mm. Western and southeastern Mexico........................................................................... O. batesi Prell, male and female
13 Pygidium densely, entirely rugopunctate. Body length 1416 mm. U.S. A and northern Mexico. ...................................................................................... O. pyriformis LeConte, male and female
Pygidium rugopunctate on base and sides ................................................................................ 14
14 Elytra weakly striate or nearly smooth. Body length 2427 mm. Southern Mexico..................... ...................................................................................................... O. dechambrei sp. nov. female
Elytral deeply punctate striate. Body length 1528 mm ............................................................ 15
15 Apex of metatibia with 1518 spinelike setae. Pygidium without punctures on center of disc .................................................................................................................................................. 16
Apex of metatibia with 2028 spinelike setae. Pygidium with minute or shallow punctures on
center of disc ............................................................................................................................. 17 16 Body length 1821 mm. Parameres with triangular, strong tooth near middle of lateral border. Oaxaca, Mexico......................................................... O. rawlinsi Dechambre, male and female
Body length 1519 mm. Morelos, State of Mexico, Guerrero, and Jalisco, Mexico.................... ............................................................. O. cuernavacensis DelgadoCastillo and Deloya, female
17 Anterior margin of pronotum with middle of marginal bead broader than dorsal area of clypeal apex. Oaxaca and Guerrero, Mexico............................................... O. subaziro Ratcliffe, female
Anterior margin of pronotum with middle of marginal bead as broad or narrower as dorsal area of clypeal apex .......................................................................................................................... 18
18 Central and basal area of pronotal disc with numerous deep, round punctures. Distal half of parameres narrowed, with preapical, rounded projection on lateral border. Body length 1718 mm. Eastern and southeastern Mexico.................. O. fairmairei Bates, male (female unknown)
Central and basal area of pronotal disc with scattered, minute punctures or lacking punctures. Parameres without preapical, rounded projection on lateral border. Body length 2028 mm. Southern U.S.A. and Mexico.................................................................................................... 18
19 Body length 2023 mm. Parameres narrowed, curved outward, with a small toothlike projection at middle of lateral border, slightly expanded and bifid at apex. Upper genital plates of female with basal projections and short setae .................... O. brevicollis Prell, male and female
Body length 2228 mm. Upper genital plates of female without basal projections and long setae ......................................................................................................... O. clunalis LeConte , female.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
Kingdom |
|
Phylum |
|
Class |
|
Order |
|
Family |
|
Genus |