Linogeraeus neglectus (LeConte)

Prena, Jens, 2009, A Review of the Species of Geraeus Pascoe and Linogeraeus Casey Found in the Continental United States (Coleoptera: Curculionidae: Baridinae), The Coleopterists Bulletin 63 (2), pp. 123-172 : 161-163

Linogeraeus neglectus (LeConte)

( Figs. 51, 52 , 62, 66, 67 , 75 )

Centrinus neglectus LeConte 1876:310 . Lectotype male, designated here, labeled ‘‘ La.,’’ ‘‘ Type. / 5405,’’ ‘‘ C. neglectus Lec. ,’’ ‘‘ Jan.–Jul. 2005 / MCZ Image/ Database,’’ ‘‘ LECTOTYPE / Prena design. 2008’’ ( MCZ) ; paralectotypes 3, 1 male from Louisiana ( MCZ), 2 [at least one of them from Kansas] not located .

Geraeus neglectus ; Schwarz in Leng (1920) [see Leng in Sherman (1929:392)].

Centrinaspis neglecta ; Casey (1920).

Linogeraeus neglectus ; Kuschel (1983).

Centrinus grisescens Casey 1892:583 . Syntypes, 5 males, 2 females, labeled (1) ‘‘N.C.’’ [encoded; stands for Asheville], ‘‘Casey/ bequest/ 1925,’’ ‘‘Type USNM/ 37815 ,’’ Casey’s handwriting ‘‘grisescens/ Csy’’; (2) ‘‘N.C.’’ [encoded; stands for Asheville], ‘‘σ,’’ ‘‘Casey/ bequest/ 1925,’’ ‘‘grisescens- 2/ Paratype USNM/ 37815 ’’; (3) ‘‘ Ohio,’’ ‘‘Casey/ bequest/ 1925,’’ ‘‘Type USNM/ 37816 ,’’ Casey’s handwriting ‘‘vitulus/ Csy. ’’ [5 syntype of C. vitula Casey ]; (4) ‘‘ Ill. ’’ [encoded; stands probably for St. Louis ], ‘‘σ,’’ ‘‘ Casey / bequest/ 1925,’’ ‘‘ Casey determ./ perscillus-6,’’ standing under C. perscillus ; (5–6) ‘‘ Mo,’’ ‘‘σ,’’ ‘‘ Casey / bequest/ 1925,’’ ‘‘ Casey determ./ perscillus-3 [other specimen numbered 5],’’ standing under C. perscillus ; (7) ‘‘ Mo,’’ ‘‘ Casey / bequest/ 1925,’’ ‘‘ Casey determ./ perscillus-2.’’ New synonymy.

Geraeus grisescens ; Schwarz in Leng (1920) [see Leng in Sherman (1929:392)].

Centrinaspis grisescens ; Casey (1920).

Linogeraeus grisescens ; Kuschel (1983).

Centrinus perscillus of authors (not Gyllenhal 1936). Casey (1892:584), misidentification; Champion (1908:277), partial misidentification.

Centrinaspis proxima Casey 1920:392 . Holotype male, labeled ‘‘Ft. Scott/ Ks.,’’ ‘‘σ,’’ ‘‘Casey/ bequest/ 1925,’’ ‘‘Type USNM/ 37813,’’ Casey’s handwriting ‘‘proximus/ Csy.’’ New synonymy.

Linogeraeus proximus ; Kuschel (1983).

Centrinaspis vitula Casey 1920:391 . Syntypes, 1 male, 1 female, labeled (1) ‘‘ Ohio,’’ ‘‘ Casey / bequest/ 1925,’’ ‘‘ Type USNM/ 37816 ,’’ Casey’s handwriting ‘‘vitulus/ Csy.’’; (2) ‘‘ Ky ,’’ ‘‘ Casey / bequest/ 1925,’’ ‘‘vitula-2/ Paratype USNM/ 37816 .’’ Synonymy with C. grisescens by Kuschel (1983).

New synonymy.

Recognition. Many L. neglectus can be recognized readily by the presence of dark scales in the usually yellowish dorsal vestiture. Specimens with rather uniform grey scales occur along the western edge of the distribution of the species ( Fig. 75 ) and can be confused with L. tonsilis and L. finitimus . In female L. neglectus , the almost perfectly parallel-sided rostrum is of diagnostic value. Male L. neglectus tend to have the apical portion of the rostrum less compressed than the other two species and typically possess very short prosternal spines, which are always absent in L. tonsilis . The ventral margin of the scrobe is visible in dorsal view and distinguishes L. neglectus from L. finitimus , L. tonsilis , and similar Neotropical species. The size range is 2.9–4.5 mm.

Distribution. This species occurs in the central and eastern United States and extends south to Panama ( Fig. 75 ).

Type locality. Louisiana .

Material examined. United States: Alabama ( CWOB 1, USNM 3), Arkansas ( TAMU 6), Florida ( CWOB 5), Georgia ( CWOB 1, USNM 1), Illinois ( CMNC 2, USNM 3), Indiana ( CWOB 9, USNM 15), Iowa ( USNM 4), Kansas ( CWOB 2, USNM 12), Louisiana ( CMNC 2, CWOB 18, TAMU 1, USNM 31), Missouri ( CWOB 1, TAMU 17, USNM 4), Nebraska ( UNSM 2), North Carolina ( USNM 1), Oklahoma ( TAMU 24, USNM 5), Tennessee ( CMNC 4), Texas ( CMNC 70, CWOB 3, TAMU 42, USNM 2), West Virginia ( CMNC 2, CWOB 2). Honduras

( CWOB 1, USNM 8), Mexico ( CMNC 3 , TAMU 16 , USNM 5 ) , Panama ( CWOB 2 , TAMU 2 ). Total 332 specimens .

Temporal occurrence. February to October.

Plant associations. Unknown.

Figures

Figs. 49–56. Linogeraeus species, dorsal and lateral aspects; scale bar 1 mm. 49, 50) L. finitimus, male; 51, 52) L. neglectus, male; 53, 54) L. squamirostris, female (dorsal), male (lateral); 55, 56) L. tonsilis, female, New Mexico, U.S.A.

Figs. 61–70. Geraeus and Linogeraeus species; 61–63, aedeagus, dorsal aspect of apical portion; 64–67, rostrum, dorsal aspect; 68–70, antenna. 61) L. finitimus; 62) L. neglectus; 63) L. tonsilis; 64) L. finitimus, male; 65) L. finitimus, female; 66) L. neglectus, male; 67) L. neglectus, female; 68) G. picumnus, female; 69) G. timidus, female; 70) L. capillatus, female.

Figs. 73–75. Maps of southern United States and Mexico (top) and United States (without northwestern part) and Central America (bottom) showing distributions of G. euryonyx, G. minor, G. nimbatus, G. pannuceus, G. patagoniensis, G. petilior, and Linogeraeus neglectus.