Asydates grandiceps (LeConte, 1866)

Mayor, Adriean J. & Gimmel, Matthew L., 2019, Revision of the Soft-Winged Flower Beetles of the Genus Asydates Casey, 1895 (Coleoptera: Melyridae: Dasytinae: Listrini), The Coleopterists Bulletin (mo 17) 73, pp. 1-71: 7-10

publication ID

http://doi.org/ 10.1649/0010-065X-73.mo17.1

publication LSID

lsid:zoobank.org:pub:3B2B38A0-F732-4356-9A4A-E306C0C91EE1

persistent identifier

http://treatment.plazi.org/id/03AF87F2-FFA1-FFD5-E9C8-FD76FBE3FD98

treatment provided by

Carolina

scientific name

Asydates grandiceps (LeConte, 1866)
status

new combination

1. Asydates grandiceps (LeConte, 1866)   , new combination

( Figs. 1A–B View Fig , 7A–B View Fig , 10A–B View Fig , 14A–B View Fig , 21A View Fig , 23A View Fig , 24A–B View Fig , 28A View Fig , 30A–B, 33 View Fig , 36B View Fig , 39 View Fig , 41 View Fig )

Pristoscelis grandiceps LeConte 1866: 350   , 355. Holotype, male from “Middle California ”, MCZH type 3505, examined. Crotch 1873: 77 (checklist); Henshaw 1885: 80 (list); Casey 1895: 460; Fall 1901: 24, 125; Leng 1920: 146 (catalog); Moore 1937: 35; Pic 1937: 90 (catalog); Blaisdell 1938: 4, 11, plate 1, figs. 1, 2, 13, plate 2, fig. 2.

Pristocelis [sic] grandiceps: Howell 1979: 45   , 1997: 12.

Scelopristis grandiceps: Mayor 2004: 86   .

Type Material. Pristoscelis grandiceps   , holotype ♂ ( Fig. 41 View Fig ), deposited in MCZH, labeled “Cal [white printed label] //Type.\3505 [red printed and handwritten label] // P. (E.) grandiceps   \Lec. [white handwritten label]”   .

Diagnosis. The large size (body length ≥ 2.6 mm), erect bristling setae on the elytra, and black dorsal color distinguish A. grandiceps   from all other species of Asydates   .

Redescription. Body elongate, robust, shiny ( Figs. 1A–B View Fig , 7A–B View Fig ); head, pronotum and elytra with sparse, inconspicuous microsculpture. Length 3.3 mm (2.6–3.8 mm, n = 20); width 1.4 mm (1.1–1.6 mm, n = 20). Head, pronotum, elytra, and venter black, antennomeres and legs often tinged with reddish, legs sometimes nearly completely reddish orange; female abdominal ventrites 3–5 orange. Pubescence conspicuous, dual, short reclining pale whitish to golden setae intermixed with long, erect, conspicuous black setae on head, pronotum, and elytra. Punctation fine, indistinct on head and pronotum; coarser, more conspicuous on elytra. Head: Large, short, slightly narrower than pronotum in both sexes, eyes bulging ( Fig. 10A–B View Fig ); male head 1.44 (1.25–1.67, n = 10), female head 1.52 (1.39–1.67, n = 10) times wider than interocular distance; fronto-clypeal region of male frons distinctly broadened ( Fig. 10A View Fig ), unmodified in female ( Fig. 10B View Fig ). Antennomeres 5–11 weakly serrate; male antennae short, not reaching base of pronotum posteriorly; female antennae shorter. Thorax: Pronotum short, 0.69 (0.64–0.73, n = 20) times as long as wide ( Fig. 14A–B View Fig ); widest at middle, lateral edges broadly rounded, anterior and posterior angles obsolete, broadly rounded. Elytra elongate, elytron 3.60 (3.36–3.75, n = 20) times as long as wide, at humeri slightly wider to slightly narrower than pronotum; elytral epipleuron distinct at base, becoming obsolete near apex of abdominal ventrite 3 in both sexes; elytral apices broadly rounded to weak sutural angle, entire, not serrulate. All tibiae with long, fine, black setae along external margin, slightly obscuring short, stout spines sparsely arranged along external margin of pro- and mesotibiae. Abdomen: Male ventrites 1–2 with indistinct median patch of white setae. Pygidium slightly emarginate apically in both sexes ( Fig. 21A View Fig ); spiculum gastrale as in Fig. 23A View Fig . Median lobe of aedeagus a bowed tube with conspicuously blunt apex ( Fig. 24A–B View Fig , lateral view); tegmen relatively short and wide, with distinct constriction at base of ring ( Fig. 28A View Fig , ventral view). Female terminalia as in Fig. 30A–B.

Host Plant Associations. Adults of A. grandiceps   have been collected from the flowers of plants in the families Asteraceae   [ Corethrogyne filaginifolia   (1), Hemizonia fasciculata   (10), Stephanomeria cichoriacea   (5) ( Fig. 33 View Fig ), S. exigua   (34), S. pauciflora   (83), S. virgata   (148), S. sp. (46), and “thistle”] and Polygonaceae   [ Eriogonum elongatum   (1)].

Seasonal Distribution. 29 June to 1 November ( Fig. 39 View Fig ).

Geographic Distribution. Santa Barbara County south to San Diego County, California, and Baja California, Mexico ( Fig. 36B View Fig ).

Material Examined. Records reported here are based on the examination of 388 specimens. MEXICO: BAJA CALIFORNIA: San Vicente, vii-8-63, P. D. Hurd (1♂, EMEC)   . USA: CALIFORNIA: Los Angeles County: Benedict Canyon [34.10°, -118.44°], 1 November 1969, leg. E. Giesbert (1♂, LACM)   ; Brentwood, S. [anta] M.[onica] Mts. , Aug. 10, 1964, L. Woodley (1♀, UCRC)   ; Pasadena [34.14°, -118.14°], 9 September 1965 (2♂♂, 2♀♀, LACM)   ; along Franklin Canyon Drive , 34.11088°, -118.41602°, 240 m, 9 August 2017, ex Stephanomeria pauciflora   , M. & L. Gimmel, ML225 (4♂♂, 11♀♀, SBMNH)   ; N. San Gabriel Canyon Rd., S. of Crystal Lake Rd. , el. 1,218 m, N34°17’58.2”, W117°50’31.6”, 13 August 2017, A. J. Mayor /Collected beating flowers of Stephanomeria virgata   (4♂♂, 2♀♀, UCRC) GoogleMaps   ; San Antonio Canyon, on Mt. Baldy Rd. , elev. 1,100 m, N34° 12.972’, W117° 40.401’, 21 July 2015, A. J. Mayor /Collected beating flowers of Stephanomeria virgata   (6♂♂, 8♀♀, UCRC, 1♂, 1♀, SBMNH) GoogleMaps   ; same except 1,146 m, N34°13.107’, W117°40.251’ (3♂♂, 2♀♀, UCRC) GoogleMaps   ; same except elev. 1,163 m, N34°13’16.2”, W117°40’05.3”, 9 August 2016 (1♂, 1♀, UCRC) GoogleMaps   ; Santa Monica , 7-22- 43, G. P. Mackenzie (1♂, UCRC)   ; Riverside County: Reche Canyon Rd. , el. 655 m, N33°58’56.1”, W117°12’55.6”, 15 July 2015, A. J. Mayor /Collected beating flowers of Stephanomeria exigua   (7♂♂, 6♀♀, UCRC) GoogleMaps   ; Riverside, Jl [July] 3, ‘35/ Timberlake Coll. / on Stephanomeria exigua   (13♂♂, 8♀♀, UCRC)   ; same except Aug. 13, 36/on Corythrogyne [sic] bernardina (1♀, UCRC)   ; Riverside, Box Spr. [ings] Mts. , viii-19-64, G. E. & G. A. Wallace (2♂♂, 2♀♀, UCRC)   ; San Bernardino County: L[ake] Arrowhead, 7-25-44, G. P. Mackenzie (1♂, UCRC)   ; same except 8-5-46 (1♂, 3♀♀, UCRC)   ; Lone Pine Canyon Rd., S. of Mormon Rocks , elev. 1,039 m, N34°18’42.8”, W117°29’55.7”, 4 August 2016, A. J. Mayor / Collected beating flowers of Stephanomeria pauciflora   (38♂♂, 22♀♀, UCRC) GoogleMaps   ; Lytle Creek Rd. , elev. 651 m, N34°11’40.9”, W117°26’36.6”, 13 July 2016, A. J. Mayor /Collected beating flowers of Stephanomeria virgata   (1♀, UCRC) GoogleMaps   ; San Bernardino Natl. Forest, Lytle Creek Rd. , elev. 1,528 m, N34°17’41.6”, W117°34’04.8”, 26 July 2016, A. J. Mayor /Collected beating flowers of Stephanomeria pauciflora   (1♂, UCRC) GoogleMaps   ; San Bernardino Natl. Forest, Swarthout Canyon Rd. , el. 1,023 m, N34° 17.428’, W117° 29.778’, 5 July 2015, A. J. Mayor /Collected from flowers of Stephanomeria pauciflora   (1♂, 1♀, UCRC) GoogleMaps   ; Wildwood Cyn , 5 mi. E. Calimesa, vii-28-65, E. I. Schlinger (2♀♀, UCRC)   ; Yucaipa, Oak Glen , Pisgah Pk., 25-08-73, C. D. Howell, on thistle, dry heads (7♂♂, 7♀♀, UCRC)   ; San Diego County: Cla [i]remont, Tec [o]lote Canyon , 19 August 1989, D. R. Glassford (3♂♂, 7♀♀, BYU)   ; Cleveland Natl. Forest, Canfield Rd. to Mt. Palomar Obs. , elev. 1,591 m, N33°20’57.6”, W116°52’20.4”, 12 August 2016, A. J. Mayor /Collected beating flowers of Stephanomeria virgata   (5♂♂, 3♀♀, UCRC) GoogleMaps   ; Jacumba , VII- 11-56/ D. J. & J. N. Knull Collrs. (1♂, OSUC)   ; La Jolla, Aug. 4, ‘34/ Timberlake Coll. / on Stephanomeria virgata   (32♂♂, 30♀♀, UCRC)   ; Lost Valley Rd. , NW of Warner Springs, elev. 893 m, N33°17’14.4”, W116°39’35.6”, 14 June 2018, A. J. Mayor /Collected beating flowers of Sephanomeria virgata   (1♂, 2♀♀, UCRC) GoogleMaps   ; Newton , VII-14- 49/ D. J. & J. N. Knull Collrs. (1♂, OSUC)   ; same except VII-5-56 (2♂♂, UCRC)   ; same except VII- 11-56 (4♂♂, OSUC)   ; same except VI-24-58 (1♂, OSUC)   ; Otay Reservoirs on Otay Lakes Rd. , elev. 160 m, N32°38.836’, W116°55.866’, 29 June 2015, A. J. Mayor /Collected beating flowers of Hemizonia fasciculata   (3♂♂, 5♀♀, UCRC, 1♂, 1♀, SBMNH) GoogleMaps   ; San Diego [32.71°,-117.17°], 18 August 1937, leg. F.W. Furry (3♂♂, 1♀, LACM)   ; same except 19 August 1937 (1♂, LACM)   ; Santa Fe Rancho [33.01°, -117.20°], 10 July 1958, leg. C.S. Papp (3♂♂, LACM)   ; Sweetwater River, 2 mi. south of Camp Cuyamaca , 18 August 1989, R.H. Glassford (1♀, BYU)   ; Santa Barbara County: UC Sedgwick Preserve, 34.7164°, -120.0936°, Malaise trap, 8–26 July 2005 (2♂♂, SBMNH)   ; same except 26 June – 8 July (1, SBMNH)   ; same except 26 July – 6 August (1♀, SBMNH)   ; same except 6–27 August (1♀, SBMNH)   ; Figueroa Mountain Road near Grass Mountain , 34.74311°,-120.04453°, 675 m, ex Stephanomeria   , 3 September 2015, leg. M. & L. Gimmel (1♂, 1♀, SBMNH)   ; East Camino Cielo at Romero Canyon , 34.47592°, -119.59600°, 940 m, 5 September 2016, ex Stephanomeria cichoriacea   , M. & L. Gimmel, ML111 (1♂, 1♀, SBMNH)   ; East Camino Cielo near San Ysidro Creek , 34.48505°, -119.62784°, 1,040 m, 5 September 2016, ex Stephanomeria virgata   , M. & L. Gimmel, ML112a (2♂♂, 3♀♀)   ; Vandenburg AFB, Station Rd. Oak Mt. , UTM 10S 0730008, 3826318, Day col. 07/23/ 04, leg. Pratt, Abela & Pierce (1♂, UCRC)   ; West Camino Cielo 1.6 km E of Refugio Road, 34.53666°, -120.05129°, 795 m, 12 August 2018, ex Stephanomeria   , M. & L. Gimmel, ML296 (1♀, SBMNH)   ; West Camino Cielo 4.5 km E of Refugio Road, 34.53411°, -120.03180°, 990 m, 12 August 2018, ex Stephanomeria   , M. & L. Gimmel, ML297 (1♂, 6♀♀, SBMNH)   ; same except 4.3 km E of Refugio Road , 34.53382°, -120.03413°, 970 m, ML298 (5♂♂, 4♀♀, SBMNH)   ; East Camino Cielo , 3.4 km E of Hwy 154, 34.51896°, -119.78360°, 970 m, 3 September 2018, ex Stephanomeria cichoriacea   , M. & L. Gimmel, ML307 (1♂, 2♀♀, SBMNH)   ; same except ex Eriogonum elongatum   (1♂, SBMNH)   ; Ventura County: Cuyama River on Hwy. 33, elev. 991 m, N34°46’11.2”, W119°25’18.9”, 1 August 2017, A. J. Mayor / Collected beating flowers of Stephanomeria pauciflora   (1♂, 5♀♀, UCRC) GoogleMaps   ; Highway 33 and Rose Valley Road, 34.53445°, -119.23870°, 1,065 m, ex Stephanomeria   , 28 August 2015, leg. M. & L. Gimmel & P. Jump (1♂, 1♀, SBMNH)   ; Los Padres National Forest, Rose Valley Rd., E. of Ojai Valley Gun Club, 1,036 m, N34°32’52.4”, W119°10’51.0”, 31 July 2016, A. J. Mayor /Collected beating flowers of Stephanomeria virgata   (14♂♂, 10♀♀, UCRC) GoogleMaps   ; same except Hwy . 33, 7.9 mi. N of Wheeler Springs, el. 1,041 m, N34°31’53.6”, W119°14’47.1”, 31 July 2016, A. J. Mayor /Collected beating flowers of Sephanomeria virgata   (1♂, 2♀♀, UCRC) GoogleMaps   ; Rose Valley Road above Gun Club , 34.54755°, -119.18098°, 1,050 m, 12 August 2016, ex Stephanomeria virgata   , M. & L. Gimmel, ML109 (5♂♂, 2♀♀, SBMNH)   ; same except 21 July 2017, ML216 (2♂♂, 7♀♀, SBMNH)   ; CA-33 at Cherry Creek Road, 34.60641°, -119.35722°, 1,270 m, 21 July 2017, ex Stephanomeria   , M. & L. Gimmel, ML214 (12♂♂, 13♀♀, SBMNH)   .

Remarks. Asydates grandiceps   is easily recognized by its large size, body length typically greater than 3 mm, and conspicuous, erect, bristling, black pubescence on the dorsal surface. LeConte (1866) based this species on “ one specimen given me by Mr. Ulke” and listed the type locality as “Middle California ”, a locality too vague to list in the Material Examined section of the species account.

EMEC

Essig Museum of Entomology

LACM

Natural History Museum of Los Angeles County

UCRC

University of California, Riverside

SBMNH

Santa Barbara Museum of Natural History

BYU

Monte L. Bean Life Science Museum

OSUC

Oregon State University

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Melyridae

Genus

Asydates

Loc

Asydates grandiceps (LeConte, 1866)

Mayor, Adriean J. & Gimmel, Matthew L. 2019
2019
Loc

[sic] grandiceps: Howell 1979: 45

Howell 1997: 12
Howell 1979: 45
1979
Loc

Pristoscelis grandiceps

Moore 1937: 35
Pic 1937: 90
Fall 1901: 24
Casey 1895: 460
1895