Anthonomus sanborni, Clark & Burke, 2010

Clark, Wayne E. & Burke, Horace R., 2010, The Anthonomus juniperinus group, with descriptions of two new species (Coleoptera: Curculionidae), Insecta Mundi 2010 (119), pp. 1-10 : 6-8

Anthonomus sanborni , new species

( Figure 3, 4 , 7, 8 , 10, 13)

Type series. Holotype. UTAH. [Utah 13 mi. W

Lehi/ West Canyon Utah / Co. May 10 1969 / Wayne

E. Clark] [ Juniperus ] (male, TAMU). Paratypes

(140). United States. ARIZONA. Apache Co.: [ ARI-

ZONA:/ Apache Co./ 5 mi. se Springerville/ Au-

gust 16, 1982/ J. C. Schaffner] (2, TAMU). Cochise

Co.: [Carr Cyn. 6200'/ Huachuca Mts./ IX-8-1965

Ariz./ C. W. O’Brien] (1, CWOB). Coconino Co.:

[Pine/ Kaibab/ Nat. For./ Ariz 8/2/31] (1, INHS)

Mohave Co.: [Ariz. 8 mi. SW./ Peach Springs/ 4600' Mohave/ Co. IX-7-1964] [C. W. O’Brien/ ex

Juniperus ] (1, CWOB). CALIFORNIA. [Calif.

San/ Francisco/ IX-5-1962] [Collector: F. Greenfield] Figure 12-14. Anthonomus juniperinus group spp., (1, CWOB). El Dorado Co.: [Fallen Leaf Cal./ E’l prothoracic and metathoracic legs, males, anterior views. Dorado Co/ VII-8-35] [F E Blaisdell/ Collector] (2, 12) A. juniperinus , 10 mi. SW Elkhart, Texas. 13) A. EMEC). Lassen Co.: [13 mi. E. McArthur,/ Cal.; sanborni , 13 mi. W Lehi, Utah County, Utah. 14) A. rileyi, Lassen County / Juniperus occidentalis / 6-3-65; Joe vic. Cypress Creek, Travis County, Texas.

Schuh] (2, CWOB; 20, JSCC). [13 mi. E.

McArthur,/ Cal.; Lassen County / Juniper / June 3, 1965 / Joe Schuh coll.] (7, JSCC). [Hallelujah / Jct. Lassen’ Co. Calif. / VII-2-1964] [D. F. Veins / Collector] (1, CWOB). [Buck Cr. Rgr. Sta / 5150' Modoc Co./ CAL: vi-8-10-70] [J. Powell and R. E. Dietz] [ Juniperus sp. ] (15, EMEC). Siskiyou Co. : [Cal.; Siskiyou Co./ Laird’s Landing / beating Juniper / June 7, 1971 / Joe Schuh, Coll.] (23, JSCC). COLORADO. Mesa Co. : [1.8 mi E Fruita / 3VIII67 Colo] (1, TAMU). [1.8 mi E Fruita / 3VIII67 Colo] [D. G. Kissinger / Acc. No 1088]

sp] [Collector:/ W. Gagne] (1, CWOB). OREGON. Crook Co.: [5 Miles West of/ Prineville, Ore./ May 3, 1939 / Schuh & Gray] (1, JS). [Prineville, Ore./ May 26, 1964 / Beating Juniper/ Kenneth Goeden] (1, ODAC). Deschutes Co.: [Tumalo State Park./ Ore., VI-15-1967 / W. F. Chamberlain] (2, TAMU). Grant Co.: [Dayville, Ore./ April 9, 1961 / Juniper/ Kenneth Goeden] (5, ODAC). [Ore., 6 mi. NW of/ Monument Grant/ County. 12 IX 66/ sticky board/ in Juniper tree/ Kenneth Goeden] (2, ODAC). Harney Co.: [Ore., 15 mi N of/ Alvord Ranch/ Harney County/ June 11, 1964 / Beating juniper/ Kenneth Goeden] (3, ODAC). Jackson Co.: [Pinehurst, Ore./ Jackson County/ April 30, 1964 / Kenneth Goeden] [Ex Juniper] (1, ODAC). Jefferson Co.: [Ore., 3 mi NE of/ Madras. 25 v 64/ beating juniper/ Kenneth Goeden] (5, ODAC). [Ore., 5 mi N of/ Madras. 18 v 67/ beating juniper/ Kenneth Goeden] (3, ODAC). [Warm Springs, Ore./ Jefferson County/ May 20, 1964 / Beating Juniper/ Kenneth Goeden] (5, ODAC). Klamath Co.: [Sprague R. Canyon,/ Ore.: 5 mi. E. Bly/ on Salix/ May 22, 1958 / Vertrees & Schuh] (1, JSCC). [3 mi. So. Saddle Mt./ Ore.: Klamath County/ Vertrees & Schuh] (1, JSCC) [ORE., Klamath Co./ Olene 4150'/ 22 May 1958] [ R K Eppley/ Collector] (1, JSCC) Wasco Co.: [Simnasho, Ore./ Wasco County/ Sept. 5, 1962 / Juniper/ Kenneth Goeden] (2, ODAC). Wheeler Co.: [Ore., 10 mi W of/ Dayville. Wheeler/ Co. June 19, 1964 / beating Juniper/ Kenneth Goeden] (3, ODAC) UTAH. [UTAH. Juni-/ per berry/ H-135] (6, USNM). [UTAH / Juniper/ berry] (2, USNM). Duchesne Co.: [Utah Roosevelt 7/ mi. W. Duchesne/ Co. May-17-1969] [ Juniperus ] (1, TAMU). Tooele Co.: [Johnson’s Pass/ Tooele Co. Utah / VIII-13-1953] [ Juniperus / utahensis] [P D Ashlock/ Collector] (1, JSCC). [Johnson’s Pass/ Tooele Co. Utah / VI-20-195] [ Juniperus / utahensis] [H E Cott/ Collector] (1, BYUC). Utah Co.: [Utah 13 mi. W Lehi/ West Canyon Utah / Co. May 10 1969 / Wayne E. Clark] [ Juniperus ] (5, TAMU). [Spanish Fork/ Utah. Aug 4/ 1958. light/ G. F. Knowlton] (1, BYUC). Wayne Co.: [2 mi. E. Torrey,/ 6500', Utah./ VIII.10.1968/ A. T. Howden] (2, CMNC).

Description. Length 2.3-3.0 mm. Body oblong-ovate ( Fig. 3, 4 ); pale to darker reddish; elongate fuscous scales sparsely distributed except for being more densely arranged on pronotum. Head moderately punctate, with elongate, acuminate, white to fulvous scales; eyes small, round, nearly evenly convex, slightly larger in male. Rostrum long, slender, especially in female, slightly, evenly curved; proximal portion with ill-defined lateral and lateromedian sulci, less well defined in female; distal portion smooth, shining, shallowly punctate, slightly sulcate near antennal insertions in male, glabrous except for sparse elongate scales at extreme base; dorsal margin of lateral rostral groove carinate; in male, more distinctly narrowed to point of antennal insertions and more widened apically in dorsal view. Pronotum slightly constricted subapically; densely punctate; with uniform vestiture of elongate, narrow, acuminate, fulvous scales. Scutellum with dense, pallid scales. Elytra broad, widened posteriorly; striae shallowly punctate; each puncture with one minute seta; interstriae broad, flat, slightly rugulose, minutely, sparsely punctate, with sparse vestiture of elongate, narrow, acuminate, fulvous scales, slightly to much less dense on broad, diagonal posteromedian fascia; integument ferruginous, slightly darker on bare posteromedina fasciae, and, in some, still darker in small maculae on interstriae 2 and 4. Pygidium with sparse, narrow setose scales; tergum 7 with posteromedian fovea in male ( Fig. 7 ) and in female ( Fig. 8 ). Sterna subequal in length; with sparse, pallid fulvous scales laterally; with sparse setae medially. Legs with femora slender, with sparse, long, pallid, setose scales; profemur with small, conical, acute ventral tooth (Fig. 13); mesofemur with smaller, minute tooth; metafemur unarmed. Protibia with inner margin nearly straight, slightly widened apically, with acute, black, curved, apical uncus (Fig. 13); mesotibia with more slender, acute uncus; metatibia slender, straight, with minute, slender, apical mucro (Fig. 13). Tarsal claws each with minute, blunt tooth. Median lobe subparallel-sided, slightly narrowed to broadly rounded apex in dorsal view ( Fig. 7 , 10).

Discussion. This species is named in honor of Francis G. Sanborn (1838-1884), the discoverer and describer of A. juniperinus . Sanborn was an economic entomologist in Massachusetts who studied the habits of insect pests of fruit and shade trees. He was also at one time employed by the Museum of the Boston Society of Natural History where he was involved in various entomological activities ( Howard 1930).

Anthonomus sanborni is the western counterpart of the eastern A. juniperinus . Although superficially similar, the two species are easily distinguished by several characters. The most evident of these are the differences in color and definition of the V-shaped elytral fascia (cf. Figs. 2, 4 ) and the fact that the dorsal vestiture of A. sanborni is more dense on the pronotum than on the elytra as compared to A. juniperinus where the density of the elongate scales is about the same on both parts of the body. Other differences are included in the key.

Biology. It is surprising that such a widespread and frequently collected species, although previously undescribed, is so little known biologically. Many of the specimens examined have label data indicating that they were collected on juniper but rarely is the species of the plant indicated. The exceptions are a few specimens collected on Juniperus occidentalis Hook. in California and Juniperus utahensis (Engelm.) Lemmon (synonym of Juniperus osteosperma (Torr.) Antoine ) in Utah. The former juniper occurs mainly in California and Oregon while the latter is widely distributed throughout the western United States. The only indication of the site of larval development is the information included on a label that the specimen was associated (collected on or reared from?) with a juniper berry. No information is available indicating that A. sanborni may develop in Gymnosporangium galls.

Figures

Figure 1-6. Anthonomus juniperinus group spp., habitus, lateral and dorsal views. 1, 2) A. juniperinus, male, 10 mi. SW Elkhart, Texas. 3, 4) A. sanborni, female, 15 mi. N Alvord Ranch, Harney County, Oregon. 5, 6) A. rileyi, female, vic. Long Hollow Creek, Travis County, Texas.

Figure 7-8. Anthonomus sanborni, pygidium, dorsal view. 7) Male with exposed apical portion of median lobe, Laird’s Landing, Siskiyou County, California. 8) Female, Utah.