Ligyrus (Ligyrus) neglectus ( LeConte, 1847 )

López-García, Margarita M. & Deloya, Cuauhtémoc, 2022, Cladistic analysis reveals polyphyly of Tomarus (Coleoptera: Scarabaeidae: Dynastinae): new classification and taxonomic revision, Zootaxa 5211 (1), pp. 1-119 : 47

Ligyrus (Ligyrus) neglectus ( LeConte, 1847)

( Figs. 13G , 15O , 18G , 26D ; 37 )

Bothynus neglectus LeConte, 1847: 87 . Original combination.

Female lectotype (MCZ) “[green disc] / type 3714 // L. juvencus / (Oliv.) Burm. / neglectus Lec. // gibossus 4” here designated. Type locality: Provinciis australibus

Description. Habitus as in Fig. 26D . Length 13.2–16.0 mm; humeral width 7.3–8.9 mm. Color dark reddish brown. Head: Frons deeply rugopunctate, with large and sparse punctures, nearly smooth on vertex and only with sparse, small punctures. Frontoclypeal region with straight, complete carina. Ocular canthus acute; with 10 ventral setae. Clypeal surface rugopunctate to transversely rugose, striae denser than those on frons. Clypeus triangular, base 3.5 times wider than apex. Clypeal teeth triangular, separated by 1 tooth diameter. Mandible with 2 apical and 1 lateral, widely rounded tooth, tooth 1 longer and narrower than tooth 2. Maxilla subrectangular; galea with 3 dorsal teeth. Apex of labrum straight. Interocular distance equal to 3.5 times an eye width. Antennal club very long. Pronotum: Surface with large, dense punctures. Apex with prominent tubercle and rounded, deep fovea. Elytra: First interval punctate, punctures similar to other intervals. Inner surface of apex with small, transverse tubercles forming about 66 parallel lines. Abdomen: Apex of tergite IV with a diagonal line of 10 transverse parallel short carinae. Pygidial surface with small to large punctures, denser on base and anterior corners. Surface in lateral view strongly convex (male) to flat (female). Legs: Protibia tridentate; basal tooth slightly distant from others. Protibial surface densely punctate. Protarsus of males simple, inner claw simple. Metatibia triangular to slightly contracted at apex. Apex of metatibia entire, with 19–25 spinules. Female genitalia: Subcoxite subrectangular (2 times wider than long). Coxite subquadrate (as long as wide); surface strongly concave. Subcoxite wider and subequal in length to coxite ( Fig. 13G ). Male genitalia: Spiculum gastrale thin, apex truncate. Parameres with apical 4th narrowed, without minute spines; lateral ventral teeth short, triangular ( Figs. 15O , 18G ). Internal sac with lamellar spiny belt long (5 times longer than copulatory lamellae); accessory lamella thickened, elongate.

Diagnosis. Ligyrus neglectus can be recognized by the frontal carina straight, not interrupted (as in L. ruginasus , Fig. 1E ); pronotum with tubercle and deep, rounded fovea ( Fig. 26D ); pronotal punctation deep and large; protibial surface densely punctate; parameres with sides nearly parallel, ventral teeth short and triangular ( Figs. 15O , 18G ).

Distribution. The species occurs along the Atlantic coastal plain from North Carolina to Florida in the United States ( Ratcliffe & Cave 2017).

Locality records ( Fig. 37 ). 588 examined specimens from FSCA, IEXA, UNSM, USNM. Counties listed from Ratcliffe & Cave (2017). UNITED STATES OF AMERICA (1,177). Alabama (18): Baldwin; Butler ; Coffee ; Geneva ; Mobile ; Monroe. Florida (840): Alachua ; Baker ; Bay ; Brevard ; Broward ; Charlotte ; Citrus ; Clay ; Collier ; Columbia ; Dade ; Dixie ; Duval ; Escambia ; Flager ; Gadsden ; Gilchrist ; Highlands ; Hillsborough ; Indian River ; Lake ; Leon ; Levy ; Liberty ; Manatee ; Marion ; Orange ; Pinellas ; Polk ; Putnam ; Santa Rosa ; Sarasota ; Seminole ; Suwannee ; Union. Georgia (162): Bibb ; Bryan ; Camden ; Clarke ; Dougherty ; Grady ; Hart ; Johnson ; Lowndes ; Macon ; McIntosh ; Seminole ; Thomas ; Tift ; Ware ; Wheeler. Louisiana (9): East Feliciana ; St. Mary ; St. Tammany ; Washington. Mississippi (19): Forrest ; George ; Greene ; Harrison ; Jackson ; Lamar ; Pearl River ; Stone. North Carolina (58): Bladen ; Brunswick ; Craven ; Dare ; Moore ; Richmond ; Robeson. South Carolina (71): Aiken ; Allendale ; Barnwell ; Beaufort ; Charleston ; Chesterfield ; Colleton ; Georgetown ; Hampton ; Jasper ; Kershaw ; Lexington ; Richland ; Sumter .

Natural history. Some examined specimens were collected in pocket gopher mounds ( Geomys ; “tuzas” in Spanish) in Florida and Alabama. This was previously reported by Ratcliffe & Cave (2017).

Figures

FIGURE 1. Head. A) Euligyrus ebenus, B) Proculigyrus cicatricosus, C) Ligyrus (Ligyrodes) peruvianus, D) L. (Anagrylius) moroni, E) L. (Ligyrus) ruginasus, F) L. (Ligyrus) nasutus, G) L. (Ligyrus) bidentulus, H) Tomarus adoceteus, I) T. maimon, J) T. pullus, K) T. pumilus.

FIGURE 13. Female genital plates. A) Euligyrus ebenus, B) Proculigyrus cicatricosus, C) Ligyrus (Anagrylius) moroni, D) L. (Ligyrodes) sallaei, E) L. (Ligyrus) allonasutus, F) L. (Ligyrus) bidentulus, G) L. (Ligyrus) neglectus, H) Tomarus laticaudus, I) T. maternus, J) T. rostratus, K) T. subtropicus. Abbreviations: SCx: Subcoxite, Cx: Coxite.

FIGURE 15. Parameres in frontal view. A) Euligyrus ebenus, B) E. similis, C) Proculigyrus cicatricosus, D) Ligyrus (Anagrylius) cuniculus, E) L. (Anagrylius) moroni, F) L. (Ligyrodes) peruvianus, G) L. (Ligyrodes) relictus, H) L. (Ligyrodes) sallaei, I) L. (Ligyrus) allonasutus, J) L. (Ligyrus) bidentulus, K) L. (Ligyrus) burmeisteri, L) Ligyrus (Ligyrus) fossor, M) L. (Ligyrus) gibbosus, N) L. (Ligyrus) nasutus, O) L. (Ligyrus) neglectus, P) L. (Ligyrus) paranaensis, Q) L. (Ligyrus) peninsularis, R) L. (Ligyrus) rubripes, S) L. (Ligyrus) ruginasus, T) L. (Ligyrus) villosus.

FIGURE 18. Parameres in lateral view.A) L. (Ligyrus.) allonasutus, B) L. (Ligyrus) bidentulus, C) L. (Ligyrus) burmeisteri, D) Ligyrus (Ligyrus) fossor, E) L. (Ligyrus) gibbosus, F) L. (Ligyrus) nasutus, G) L. (Ligyrus) neglectus, H) L. (Ligyrus) paranaensis, I) L. (Ligyrus) peninsularis, J) L. (Ligyrus) rubripes, K) L. (Ligyrus) ruginasus, L) L. (Ligyrus) villosus.

FIGURE 26. Habitus of the species of Ligyrus. Subgenus Ligyrus: A) Ligyrus fossor, B) L. gibbosus, C) L. nasutus, D) L. neglectus, E) L. paranaensis, F) L. peninsularis, G) L. rubripes, H) L. ruginasus, I) L. villosus. Scale bar: 5 mm.

FIGURE 37. Distributional records of Ligyrus (Ligyrus) fossor and L. neglectus.