Microchilus rodmani Jameson, 2008

Jameson, Mary Liz, 2008, Review of the genus Microchilus Blanchard (Coleoptera: Scarabaeidae: Rutelinae: Geniatini), Insecta Mundi 2008 (25), pp. 1-14 : 11-13

Microchilus rodmani Jameson , new species

( Fig. 3-4 , 14 , 16, 18, 20, 23 -25)

Type Material. Holotype, allotype, 6 male paratypes, and 5 female paratypes. Holotype male from ZMHB labeled: a) “ GOYAZ L. Bulhoes R. Spitz S.” (front side, white label, type set), b) “8.X1.35.” (obverse side, white label, handwritten), c) male genitalia card mounted, d) wing card mounted, e) “Kamp Naturseite n. Blättern” (white label, handwritten in pencil), f) “ Microchilus Spitzi Ohs. Cotype [male symbol]” (red label, handwritten), g) my holotype label . Allotype female from ZMHB labeled: a) “ GOYAZ L. Bulhoes R. Spitz S.” (front side, white label, type set), b) “25.X1.37.” (obverse side of “a”, white label, handwritten), c) “ Microchilus Spitzi Ohs. Cotype [female symbol]” (red label, handwritten), g) my allotype label. Three paratypes (1 females at ISNB, 1 male and 1 female at UNSM) labeled: a) “Brésil - Uberaba Minas Geraes Coll. LeMoult ” (white label, type set), b) “Coll. R. I. Sc. N. B.” (faded purple label, typeset), c) my paratype label. Four paratypes (3 males and 1 female at ISNB) labeled: a) “Brésil - Uberaba” (white label, type set), b) “ R. Mus. Hist. Nat. Belg. I. G. 12.595” (white purple label, typeset), c) my paratype label. One male paratype at UCCC labeled: a) “Leopoldo Bulhoes Est. Goyaz Dec. 37 Dr. Nick. ” (white label, typeset), b) legs card mounted, c) genitalia in glycerin vial, d) “Brasil” (handwritten, white label), e) “Sud-America” (typeset, white label), f) “ Ohaus determ. Microchilus Spitzi Ohs. Cotype [male symbol]” (handwritten and typeset, white label), g) my paratype label. One male paratype at CMNC labeled: a) male genitalia cardmounted, b) “Leopoldo Bulhoes Est. Goyaz Dec. 37 Dr. Nick. ” (white label, typeset), c) “H. & A. HOWDEN COLLECTION ex. A. Martínez coll.” (white label, typeset, with border), d) “cotype” (handwritten, orange label), e) “ Microchilus Spitzi Ohs. Cotype [male symbol]” (white label, handwritten and typeset), f) my paratype label. One female paratype at UCCC labeled: a) “Leopoldo Bulhoes Est. Goyaz Dec. 37 Dr. Nick. ” (white label, typeset), b) mouthparts and one egg card mounted and handwritten text that reads, “ 10 eggs ” c) “ Ohaus determ. Microchilus Spitzi Ohs. Cotype [female symbol]” (handwritten and typeset, white label), g) my paratype label. One female paratype at CMNC labeled: a) “ BRASIL Eo São Paulo Rio Claro R. Pereira leg. Coll. Martínez Dic. 942” (handwritten, white label), b) “ Microchilus lineatus Bl. [female symbol] A. Martínez Det. 1963” (handwritten and typeset, white label), c) “H. & A. HOWDEN COLLEC- TION ex. A. Martínez coll.” (white label, typeset, with border), d) “ Microchilus spitzi Ohaus det. M.E. Jameson 1998” (handwritten and type set, white label), e) my paratype label .

Holotype Male ( Fig. 3 ). Length 7.3 mm; width at humeri 4.0 mm. COLOR: Head, pronotum, scutellum, legs, and pygidium reddish-brown; venter castaneous; elytra tan with well-defined, reddish-brown, longitudinal vittae. HEAD: Frons in lateral view with base and disc flat, punctate; punctures minute (base) to small (apex), moderately dense, sparsely setose; setae minute, tawny. Interocular width 6.1 transverse eye diameters. Clypeus in lateral view with base and disc flat, margins weakly concave; in dorsal view, apex broadly rounded, moderately reflexed. Surface densely (base) to confluently punctate (apex), punctures moderate to moderately large in size. Mandible with molar region and lamellae moderately developed. Apex with weakly developed ventrally produced tooth. Labrum at middle apex with quadrate, ventrally-produced tooth. Maxilla with 3 poorly defined ridges; terminal segment of palpus elongateoval, kidney-shaped, subequal in length to segments 1-3; basistipes with length subequal to width at base. Antenna with club 1.9 times longer than segments 2-7 combined. PRONOTUM: Surface punctate; punctures on disc minute (sparse) to small (moderately dense), punctures on base and margins dense, some setose; setae on disc minute and tawny, setae on margins moderate in length, scale-like, white. Scutellum with surface moderately densely punctate, punctures minute and small, some setose; setae short, scale-like, white. ELYTRON: Surface punctate, with weakly to moderately defined striae. Punctures round or ocellate, small, moderately dense, some setose; setae minute, tawny. Striae indicated by depressed, punctate line; punctures round or ocellate, small, moderately dense, some setose: 2 striae adjacent to suture (reaching apex), 4 striae on disc (reaching apex), 2 striae laterad of humerus. Intervals moderately densely punctate; punctures round or ocellate, small, moderately dense or occasionally confluent, some setose; setae minute, tawny. Striae suffused with dark reddish-brown color. Elytral sutural length 9.0 times length of scutellum. PYGIDIUM: Surface convex in lateral view, densely (mid-disc) to confluently punctate (margins); punctures transversely elongate, moderately large to large, some setose near margins; setae white, scale-like, short. Apical bead complete. VENTER: Mesosternum not invaginated, not forming a rounded pit. Base of first sternite at middle simple, not produced ventrally. Last sternite of male at apex with moderately deep emargination (middle of emargination subequal to 1/2 length of sternite); middle of emargination rounded. LEGS ( Fig. 16, 18, 20 ): Male protarsomere I subequal in length and width (length subequal to length of protarsomere II), dorsoventrally flattened; protarsomeres II-III slightly wider than long (1.2 wider than long), dorsal surface weakly convex; protarsomere IV subequal in width and length; protarsomere V elongate (1.6 times longer than protarsomere IV), weakly flattened dorsoventrally. Metatrochanter with apex not produced beyond posterior border of femur. Metatibia lacking external carina. Inner apical spur about 1/3 length of apical spur in male. PARAMERES ( Figs. 23-24 ): Shape asymmetrical.

Allotype Female ( Fig. 4 ). The allotype differs from the male holotype in the following respects: Length 7.3 mm; width at humeri 3.8 mm. HEAD: Interocular width 8.4 transverse eye diameters. Antenna with club 1.4 times longer than segments 2-7 combined. ELYTRON: Intervals densely punctate. LEGS: Protarsomere I elongate (subequal in length to protarsomeres II-III), weakly dorsoventrally flattened; protarsomeres II-IV subequal in width and length, weakly dorsoventrally flattened; protarsomere V elongate (about 1.7 times longer than protarsomere IV), weakly flattened dorsoventrally. Metatibia lacking external carinae. Inner apical spur about 1/3 to 1/2 length of apical spur.

Paratypes (6 males, 5 females). The paratypes differ from the allotype and holotype in the following respects: Length 6.6-8.1 mm; width at humeri 3.7-4.4 mm. COLOR: Light reddish-brown to dark reddish-brown; venter castaneous; elytral vittae reddish-brown or castaneous. HEAD: Frons in lateral view with base and disc flat or weakly convex. Interocular width of male 6.1-8.7 transverse eye diameters; female 6.7-7.9. Clypeus in lateral view with base and disc weakly convex or flat. Male antenna with club 1.9-2.0 times longer than segments 2-7 combined. Female antenna with club about 1.4-1.8 times longer than segments 2-7 combined. ELYTRON: Striae suffused with castaneous or dark reddish-brown color. Elytral sutural length 6.8-9.8 times length of scutellum. LEGS: Male protarsomeres II-III slightly wider than long (1.2-1.3 wider than long); male protarsomere V elongate (1.5-1.7 times longer than protarsomere IV). Female metatibia occasionally with poorly developed, external carina near apical 1/3 .

Diagnosis. Microchilus rodmani is separated from M. lineatus by the following characters: second protarsomere in the male subequal in width and length ( Fig. 16 ) (second protarsomere elongated in male M. lineatus [ Fig. 15 ]); male metatibia lacking external carinae ( Fig. 18 ) (male of M. lineatus with carina near apical third [ Fig. 17 ]); female metatibia lacking external carinae (female M. lineatus with carinae in basal third and near apical third); sparse, white scale-like setae on pronotum (not present in M. lineatus ); and form of male parameres ( Fig. 23-24 ). Additional characters separating the species are: mandible with molar region and lamellae moderately developed (poorly developed in M. lineatus ) and labrum at middle apex with quadrate, ventrally-produced tooth (triangular, ventrally produced tooth in M. lineatus ).

Etymology. Microchilus rodmani is named in honor of James Rodman, former program director at the National Science Foundation, for his enduring passion for systematics and for implementing the NSF- PEET program model that has helped address global problems associated with the biodiversity crisis by training new systematists, monographing poorly known taxonomic groups, and disseminating biodiversity data electronically ( Rodman and Cody 2003). As stated by Wheeler (2004), “a renaissance in taxonomy is impossible without visionary and courageous leadership.” Rodman provided this leadership.

Distribution (Fig. 25). Central to southeastern Brazil.

Locality Data. 13 specimens examined from CMNC, UCCC, ISNB, UNSM, ZMHB. BRAZIL (13). GOIAS (5): Leopoldo Bulhões [Kamp Naturseite] (5). MINAS GERAIS (7): Uberaba (7). SÃO PAULO (1): Rio Clara (1) .

Temporal Data. November (4), December (4).

Natural History. Unknown.

Remarks. Based on locality information, M. lineatus and M. rodmani are apparently sympatric in a portion of their range (from Uberaba south to near São Paulo).

Figures

Figure 1-7. Habitus images Microchilus species and other Geniatini. 1) Microchilus lineatus, male. 2) M. lineatus, female. 3) M. rodmani, holotype male. 4) M. rodmani, allotype female. 5) Bolax foveolata Blanchard, male. 6) Leucothyreus beckeri, male. 7) Eunanus murinus Ohaus, male. Scale line = 1.0 mm.

Figure 8-14. Generic characters for members of the genus Microchilus. 8) Labrum and clypeus, frontal view of M. lineatus. 9) Mentum, ventral view of M. lineatus. 10) Right maxilla, ventral view of M. lineatus. 11) Claws, dorsal oblique view of M. lineatus. 12) Left mandible, dorsal oblique view of M. lineatus. 13) Gonocoxites, dorsal view of M. lineatus. 14) Left wing, ventral view of M. rodmani. Scale line = 0.5 mm.

Figure 15-24. Diagnostic characters of Microchilus species. 15) Right protarsomeres of male M. lineatus, dorsal view. 16) Right protarsomeres of male M. rodmani, dorsal view. 17) Right metatibia of M. lineatus, ventral view. 18) Right metatibia of M. rodmani, ventral view. 19) Right protarsomeres of female M. lineatus, ventral view. 20) Right protarsomeres of female M. rodmani, ventral view. 21-22) Parameres of M. lineatus, dorsal view and lateral view, respectively. 23-24) Parameres of M. rodmani, dorsal view and lateral view, respectively. Scale line = 0.5 mm.