Lissorhoptrus, OF

O'Brien, Charles W. & Haseeb, Muhammad, 2014, Revision of the “ Rice Water Weevil ” Genus Lissorhoptrus LeConte (Coleoptera: Curculionidae) in North America North of Mexico, The Coleopterists Bulletin 68 (2), pp. 163-186 : 165-166

KEY TO THE SPECIES OF LISSORHOPTRUS OF

NORTH AMERICA NORTH OF MEXICO

1. Tarsomere 3 distinctly wider than 2, emarginate to cordate ( Fig. 35b ).............................2

1′. Tarsomere 3 not wider than 2, sublinear, truncate ( Fig. 35a ) ........................................................... 4

2. Apical area of rostrum glabrous; midtibiae with long, fine swimming hairs on inner and outer margins; male hind tibia with large premucro; rarely coastal, associated with fresh water....... ..................................... L. buchanani Kuschel

2′. Apical area of rostrum densely clothed with hydrofuge scales and setae; midtibia lacking long swimming hairs; male hind tibia lacking premucro; coastal, associated with salt marshes and/or intertidal zones..................................... 3

3. Antennal funicle short, ca. 0.80X longer than scape; ocular lobe moderately welldeveloped; odd-numbered elytral intervals with inconspicuous, curved setae on scarcely evident swellings............. L. chapini Kuschel

3′. Antennal funicle long, ca. 1.50X longer than scape; ocular lobe weakly developed; oddnumbered elytral intervals lacking setae, with weakly developed swellings only on declivity ...................................... L. insularis Kuschel

4. Elytra less than 1.60X as long as wide at humeri, intervals usually with 3 or more rows of scales; apical margin of female tergite VII medially not to moderately deeply emarginated (except L. oryzophilus ); widely distributed .................................................................. 6

4′. Elytra greater than 1.62X as long as wide at humeri; intervals usually with 2 or 3 rows of scales; apical margin of female tergite VII medially weakly to moderately deeply emarginate; Florida only.......................................5

5. Funicle short, 0.80X as long as scape; pronotal apical constriction at apical 1/3, pronotal side margins strongly rounded behind constriction, not distinctly impressed behind rounded margin; female tergite VII with apical margin moderately deeply emarginate medially........ ................................ L. longipennis Kuschel

5′. Funicle long, 1.20X as long as scape; pronotal apical constriction at apical 1/6, pronotum weakly rounded behind constriction, distinctly sinuately impressed behind rounded margin; female tergite VII with apical margin nearly straight, weakly sinuate medially ........ .................................... L. longitarsis Kuschel

6. Male hind tibial mucro with 3 large teeth, 2 apical anteriorly directed teeth appearing forked; female tergite VII deeply, narrowly emarginate medially; frons with 2 distinct, curved, submedian setae ................................. .................................. L. oryzophilus Kuschel

6′. Male hind tibial mucro with 2 or 3 teeth of variable size, not appearing forked anteriorly; female tergite VII not or at most moderately emarginate medially; frons lacking submedian curved seta or with numerous setae .............7

7. Elytra ca. 0.25X wider at base than pronotum; rostrum with dorsum nearly straight, uneven, flattened along midline; pronotal ocular lobes weakly developed; scape with 1 or 2 apical setae ............................................ L. lacustris Kuschel

7′. Elytra ca. 0.40X wider at base than pronotum; rostrum with dorsum weakly curved, even, convex along midline or weakly curved with apex abruptly depressed; pronotal ocular lobes moderately to strongly developed; scape with several to numerous setae.............................8

8. Frons with numerous distinct, curved, submedian setae; rostrum with dorsum weakly curved, even, convex along midline; pronotal ocular lobes moderately strongly developed; scape with several setae; East of Rocky Mountains .......................................... L. simplex (Say)

8′. Frons lacking setae; rostrum with dorsum weakly curved, weakly convex along midline, apex abruptly depressed; pronotal ocular lobes strongly developed; scape with numerous setae; Arizona only ......................................... .......... L. robbinsorum O’ Brien, new species

Figures

Fig. 35. Tarsus of Lissorhoptrus species. a) L. longipennis, sublinear, b) L. insularis, cordate.