Revision of the “ Rice Water Weevil ” Genus Lissorhoptrus LeConte (Coleoptera: Curculionidae) in North America North of Mexico Author O'Brien, Charles W. Author Haseeb, Muhammad text The Coleopterists Bulletin 2014 2014-06-01 68 2 163 186 http://dx.doi.org/10.1649/0010-065x-68.2.163 journal article 10.1649/0010-065x-68.2.163 1938-4394 10101627 DDDCBC36-2A68-47FA-A25B-A557295DCDEA Lissorhoptrus insularis Kuschel, 1952 new rank ( Figs. 15, 16 , 26 , 35b ) Lissorhoptrus chapini insularis Kuschel 1952: 34 . Holotype female, John’ s Island, South Carolina , USA (USNM). Redescription. Male. Body medium-sized; robust. Rostrum : Moderately long, 0.73X as long as prothorax; black, broadly subcylindrical; dorsum nearly straight, apex abruptly depressed; flattened along midline; venter straight, lacking carina; basal 2/3 completely clothed, scales contiguous, moderately rough, agglutinate; apical 1/3 clothed with contiguous, rough, plumose scales; sides parallel; suprascrobal groove strongly developed. Head : Weakly convex; agglutinate scales nongranulate, subcontiguous, brownish; plumose scales whitish, on articulating area and around and behind eyes; frons without submedian setae, broad, 0.50X as wide as head across eyes, flattened, indistinctly set off from rostrum by shallow impression. Antennae : Inserted just in front of apical 1/3; scape moderately short, moderately slender, strongly clavate, with 1–2 subapical setae; scape and funicle reddish brown; funicle long, 1.57X as long as scape, club elongate-oval, slightly asymmetrical, 0.43X as long as funicle, reddish brown, 1 st club segment ca. 2/3 total club length, glabrous. Pronotum : Transverse, 0.85X as long as broad; sides sinuately subparallel, weakly expanding from base; apical constriction strong, in apical 1/5; scales dense, roughened, agglutinate; apical constriction dorsally distinct and uniform, weakly rounded behind constriction, sides slightly impressed behind round area; disc transversely weakly convex, not undulate, rugulose; pleuron brown; ocular lobes weakly developed. Elytra : 1.24X wider at humeri than pronotum; 1.47X longer than wide at humeri; gradually expanding behind humeri to declivity, declivity at 60° (in relation to dorsal plane); moderately wider than prothorax; apices nonacuminate, conjointly rounded; humeri poorly developed, weakly obliquely angulate, not at all produced or projecting; intervals uneven in width, flattened to very weakly convex, odd-numbered intervals with setae lacking; indistinct swellings only posteriorly on declivity; strial grooves distinct, deep, narrow, punctures small and medium-sized, narrow, deep, not wider than strial grooves; scales subgranulate, contiguous, round, arranged irregularly, usually with 3 or more scales across intervals, brown, tan, and whitish; indistinctly maculate; cuticle black. Venter : Prosternum medially clothed, broadly in front of coxae and broadly behind coxae, with plumose scales. Abdominal ventrites : Ventrite I with median impression deep, broad, uniformly impressed for entire length, not narrowed apically, impression continued on basal 1/2 of ventrite II, ventrite I with apical margin weakly declivous, 1.33X as long as II; II medially impressed, with impression broad, shallow, apical 1/2 unevenly declivous, not impressed on declivity, 3.00X as long as III and IV together; ventrite V basally flat; transversely impressed apically, impression deep, broad, lacking median subapical carina or tubercle; with cluster of 3–4 coarse, erect apicolateral setae; 3.33X as long as III and IV together; 1.11X as long as II; 0.83X as long as I; I and II completely clothed, with contiguous, agglutinate scales; III and IV completely clothed, with dense, suberect, plumose scales, and lacking, erect setae. Tergite VII : Apical margin weakly, medially emarginate. Legs : Moderately long; femora clavate, reddish black; tibiae moderately slender, reddish brown; fore and hind tibiae with inner margin straight, with outer margin slightly arcuate toward apex (in lateral view), few inconspicuous bristles on inner surface, short inconspicuous bristles on outer surface; middle tibiae with short, coarse swimming bristles, on inner and outer margins; hind tibial mucro 3-toothed, basal tooth moderately large, acute, posteriorly directed, median tooth small, acute, posteriorly directed, apical tooth large, strongly curved, acute, parallel to apex of tibia; tarsi moderately long, sublinear, reddish brown, slightly widened toward apex; tarsomere 3 distinctly wider at apex than 2, subemarginate; claws reddish brown. Standard length : 3.00 mm. Female. Rostrum : 0.62X as long as prothorax. Elytra : 1.25X wider at humeri than pronotum; 1.84X longer than wide at humeri. Tergite VII : Apical margin moderately emarginate medially. Abdominal ventrites : Ventrite I lacking median impression; 1.25X as long as II; II flattened, not impressed on declivity, apical 1/2 steeply declivous; V transversely convex basally, transversely impressed apically, impression moderately deep, broad, lacking median subapical carina or tubercle. Standard length : 3.50 mm . Intraspecific Variation. The few specimens available of this species are quite uniform. The body ranges in length from 3.00– 3.70 mm . Remarks and Comparative Notes. This species is similar to L. chapini which, in addition to the key characters, has tarsomere 3 short and cordate, with the lobes very short, not elongate and nearly bilobed. The distributional ranges of L. chapini and L. insularis overlap in New Jersey , so they do not meet the condition of allopatry important to subspecies rank. In addition to these characters, which alone would distinguish L. insularis as a valid species, the differences in the hind tibial mucro of the male ( Figs. 25, 26 ) validate the change in rank to species. Biological Notes. This is a rarely collected species, associated with saltwater cordgrass, Spartina alterniflora Loisel (Spartinaceae) . Distribution. Known only from coastal areas of South Carolina , Georgia , and New Jersey . Material Examined. Four specimens including holotype . GEORGIA : Sapelo Island , VII-1960 (1), Salt marsh, Spartina alterniflora , 24-IV-1961 (1). NEW JERSEY : Sea Id. City , 22-V (1). Specimens are in CWOB and MCZC .