Sennius durangensis Johnson & Kingsolver, 1973

Viana, Jéssica Herzog & Ribeiro-Costa, Cibele Stramare, 2013, Review of the largest species group of the New World seed beetle genus Sennius Bridwell (Coleoptera: Chrysomelidae), with host plant associations, Zootaxa 3736 (5), pp. 501-535 : 510-512

Sennius durangensis Johnson & Kingsolver, 1973

( Figs 13–20 )

Sennius durangensis Johnson & Kingsolver, 1973: 47 (description, key, figures, type designation, taxonomy, distribution, host); Johnson 1980: 30 (host); Johnson & Kingsolver 1981: 419 (catalog, distribution); Udayagiri & Wadhi 1989:102 (catalog); Luna-Cozar et al. 2002: 26 (list); Romero-Nápoles & Johnson 2004: 627 (list).

Redescription. Dimension. BL: 1.4–1.9 mm; BW: 0.9–1.3 mm.

Integument color. Head black with labrum brown to black ( Fig. 14 ); antennomeres 1–4 red-orange to brown, 5 red-orange to black, 6–10 black, 11 brown to black ( Figs 14, 15 ). Black elytra, each with red-orange macula generally vertically elongated extending from 3rd strial interval to lateral margin, occupying most of elytra, or when macula smaller, not reaching lateral margin and occupying only median region of each elytron ( Fig. 13 ). Thorax, forecoxa and hind leg black; basal region of fore- and mid femur dark brown to black, remainder brown to pale brown, mid leg generally darker than forelegs. Tibiae and apex of femur sometimes lighter ( Fig. 14 ).

Pubescence. Head with white sparse setae, moderately dense on post-ocular lobe and on posterior area near post-ocular lobe; labrum with sparse golden setae ( Fig. 15 ). Pronotal setae white or gold generally sparse to moderately dense and evenly distributed. Elytra with sparse, evenly distributed, white and golden or just white setae ( Fig. 13 ). Pygidium with moderately dense white setae, sometimes with denser vertical and medial strip at base ( Fig. 16 ). Ventral surface with sparse to moderately dense white setae ( Fig. 14 ).

Head with frons convex, frontal carina slightly evident and ocular sinus slightly deep, less than half eye length ( Fig. 15 ). Antennomeres 1 and 3 filiform, 2 and 4 moniliform, 5 and 6 longer than wide, 7–10 wider than long, 11 globular but pointed apically. Disc of pronotum strongly sulcate at basal lobe. Elytra without denticle at strial base. Hind femur on ventral margin with slightly prominent tooth (0.02–0.04 mm), not microserrate ( Fig. 17 ). Hind tibia without lateroventral carina ( Fig. 18 ).

Male genitalia. Median lobe weakly sclerotized, about 7.9 times longer than wide medially, apex slightly expanded; ventral valve elongated with truncate apex and lateral margins sinuous. Internal sac with hinge sclerites long, slightly curved and thin; apical region with group of spicules near ventral valve, subapical region with short and slightly dense group of spicules; submedian region with group of long spicules and rows of short spicules at base; latero-basal lobes of internal sac with few short spicules; basal region with denticules not denser near gonopore ( Fig. 19 ). Tegmen with lateral lobes separated by emargination about 0.9 times their length ( Fig. 20 ).

Material examined. Types (93): Sennius durangensis Johnson & Kingsolver, 1973 . Holotype and Allotype deposited in USNM. Holotype, labels: “ 48 mi. N. Rodeo \ Dgo., Mex. \ VI-4-68 ” (White) “C. D. Johnson \ Collector” (White) “USNM \ Type Nº \ 71394”(Red) “ Holotype \ Sennius durangensis \ Johnson & Kingsolver” (Blue). Allotype, labels: “ MEX.: Dgo., 8 mi. NE \ Guadalupe Victoria \ VIII-10-64 ”(White) “C. D. Johnson \ Collector” (White) “USNM \ Type Nº \ 71394”(Red) “Allotype \ Sennius durangensis \ Johnson & Kingsolver” (Blue). Paratypes studied, deposited in TAMU (CD Johnson collection) (76 specimens), FSCA (2 specimens), USNM (10 specimens) and CNCI (3 specimens), labels: MEX: Coahuila: 1, “ MEX.: Coah., 31 mi. \ S Monclava \ VII-11-64 ”(White) “C. D. Johnson \ Collector”(White) “ Paratype ”(Blue) “ Sennius \ durangensis J & K \ det. C. D. Jonhson \ 1973”(White) “ex. C. D. Johnson Collection \ August 1999, Texas A&M \ University Insect Collection”(White) (TAMU); Sinaloa: 1, “Mazatlan, Sinaloa, \ México VIII-14-65 \ H. Burke & J. Meyer”(White) “A & M”(Yellow) “ Paratype ”(Blue) “ Sennius \ durangensis J & K \ det. C. D. Jonhson \ 1973”(White) “ex. C. D. Johnson Collection \ August 1999, Texas A&M \ University Insect Collection”(White) (TAMU); Durango: 1, “ 48 mi. N. Rodeo \ Dgo., Mex. \ VI-4-68 ” (White) “C. D. Johnson \ Collector” (White) “ Paratype ”(Blue) “ Sennius \ durangensis J & K \ det. C. D. Jonhson \ 1973”(White) “ex. C. D. Johnson Collection \ August 1999, Texas A&M \ University Insect Collection”(White) (TAMU); 2, “ 48 mi. N. Rodeo \ Dgo., Mex. \ VI-4-68 ” (White) “C. D. Johnson \ Collector” (White) “ Paratype ”(Blue) “ Sennius \ durangensis J & K \ det. C. D. Jonhson \ 1973”(White) (FSCA); 1, “ MEX.: Dgo., 6 mi. E \ Vicente Guerrero \ VII-9-64 ”(White) “ Paratype ”(Blue) “ Sennius \ durangensis J & K \ det. C. D. Jonhson \ 1973”(White) “ex. C. D. Johnson Collection \ August 1999, Texas A&M \ University Insect Collection”(White) (TAMU); 1, “ MEX.: Dgo., 6 mi. E \ Vicente Guerrero \ VII-9-64 ”(White) “C. D. Johnson \ Collector”(White) “ Paratype ”(Blue) “ Sennius \ durangensis J & K \ det. C. D. Jonhson \ 1973”(White) “ex. C. D. Johnson Collection \ August 1999, Texas A&M \ University Insect Collection”(White) (TAMU); 8, “ 9 mi. NE Guadalupe \ Victoria, Dgo, Mex. \ VIII-12-1965. H. R. \ Burke & J. R. Meyer” (White) “A & M”(Yellow) “ Paratype ”(Blue) “ Sennius \ durangensis J & K \ det. C. D. Jonhson \ 1973”(White) “ex. C. D. Johnson Collection \ August 1999, Texas A & M \ University Insect Collection”(White) (TAMU); 2, “ MEX.: Dgo., 8 mi. NE \ Guadalupe Victoria \ VII-10-64 ”(White) “C. D. Johnson \ Collector”(White) “ Paratype ”(Blue) “ Sennius \ durangensis J & K \ det. C. D. Jonhson \ 1973”(White) “ex. C. D. Johnson Collection \ August 1999, Texas A&M \ University Insect Collection”(White) (TAMU); 53, “ MEX.: Dgo., 8 mi. NE \ Guadalupe Victoria \ VII-10- 64 ”(White) “Swept Cassia \ crotalarioides ”(White) “Collr: C. D. \ Johnson”(White) “ Paratype ”(Blue) “ Sennius \ durangensis J & K \ det. C. D. Jonhson \ 1973”(White) “ex. C. D. Johnson Collection \ August 1999, Texas A&M \ University Insect Collection”(White) (TAMU); 8, “ MEX.: Dgo., 8 mi. NE \ Guadalupe Victoria \ VII-10- 64 ”(White) “Swept Cassia \ crotalarioides ”(White) “Collr: C. D. \ Johnson”(White) “ Paratype \ Sennius \ durangensis \ Johns. & Kings.” (Blue) (USNM); 1, “ MEX.: Dgo., 8 mi. NE \ Guadalupe Victoria \ VII-10- 64 ”(White) “Swept Cassia \ crotalarioides ”(White) “Collr: C. D. \ Johnson”(White) “ Paratype ”(Blue) “ Sennius \ durangensis J & K \ det. C. D. Jonhson \ 1973”(White) “ex. C. D. Johnson Collection \ August 1999, Texas A&M \ University Insect Collection”(White) (USNM); 3, “ MEX.: Dgo., 8 mi. NE \ Guadalupe Victoria \ VII-10- 64 ”(White) “C. D. Johnson \ Collector”(White) “ Paratype ”(Blue) “ Sennius \ durangensis J & K \ det. C. D. Jonhson \ 1973”(White) “ PARATYPE \ CNC Nº13138”(Yellow) (CNCI); 7, “ 5 mi. W Guadalupe \ Victoria, Dgo, Mex. \ VII-29-66 \ P. M. & P. K.Wagner” (White) “A & M”(Yellow) “ Paratype ”(Blue) “ Sennius \ durangensis J & K \ det. C. D. Jonhson \ 1973”(White) “ex. C. D. Johnson Collection \ August 1999, Texas A&M \ University Insect Collection”(White) (TAMU); Zacateca: 1, “ MEX. Zacat. \ 4 mi. N. of Fresnillo \ 20-VIII-1969 ” (White) “P. H. Arnaud, Jr. \ E. S. Rose \ D. C. Rentz”(White) “CAS”(White) “ Paratype ”(Blue) “ Sennius \ durangensis J & K \ det. C. D. Jonhson \ 1973”(White) “ex. C. D. Johnson Collection \ August 1999, Texas A&M \ University Insect Collection”(White) (TAMU); Hidalgo: 1, “ 7 mi. N. E. Zimapan \ Hidalgo, Mex. \ Aug. 15, 1958 \ H. F. Howden”(White) “ Paratype \ Sennius \ durangensis \ Johns. & Kings.” (Blue) (USNM). Note: The paratypes studied are part of the type material designated by Jonhson & Kingsolver (1973). Addition to museums above, others paratypes were deposited in CAS, FMNH and MCZ.

Non-type (19): MEX: Sonora: No locality : [19]68, C. D. Johnson, 1 (TAMU). Coahuila: 18mi. S. E. Saltillo: 21/VI /[19]71 C. D. Johnson, 2 (CNCI). 28 mi. S. E. Saltillo: 10/VII /[19]63, R. H. Arnett, 7 (TAMU). No locality : 18/VII /[19]63, R. H. Arnett, 5 (TAMU). Durango: 9 mi. NW La Zarca: 1/VII/1971, O’Brien & Marshall, 1 (TAMU); Km. 739 Hwy. to Durango: 15/VII /[19]69, Ward. Temorio & Bennett, 1 (TAMU). San Luis Potosí: 65 mi. NW San Luis Potosi, 30/VI/1971, Ward & Brothers, 1 (TAMU). No locality : no further data, 1 (TAMU).

Distribution. MEX (Sonora, Coahuila, Durango, Zacatecas, Hidalgo, San Luis Potosí, Nuevo León, Querétaro, Sinaloa).

Host plant. FABACEAE : Caesalpinioideae : Senna covesii (A.Gray) Irwin & Barneby.

Diagnosis. Sennius durangensis (Subgroup 2) resembles S. medialis (Subgroup 2), S. abbreviatus (Subgroup 1) and S. rufomaculatus (Subgroup 1) by the extremely similar coloration of the dorsum. Sennius durangensis differs from the others only by having the elytra with sparse white or white and golden pubescence. In S. medialis the pubescence is moderately dense, not forming patches, which are present in S. rufomaculatus at the base of the 3rd and 5th interstices. And it differs by having the maculae more elongated, occupying most of each elytron, which in S. abbreviatus are smaller and occupy only the basal region. Comparing the genitalias, S. durangensis is more similar to S. medialis by having the median lobe slightly sclerotized, characteristic of subgroup 2, and differ from each other by the hinge sclerites, wider and bifid in S. durangensis , and thin with narrower base in S. medialis . Other comments in the diagnosis of S. abbreviatus .

Figures

FIGURES 13 – 20. Sennius durangensis. 13, dorsal view; 14, lateral view; 15, head, frontal view; 16, pygidium; 17, part of hind leg, internal view; 18, hind tibia, external view; 19, 20 male genitalia: 19, median lobe with hinge sclerites, others sclerites magnified and latero-basal lobes of internal sac; 20, tegmen.