Oxychalepus externus ( Chapuis 1877 )

Staines, C. L., 2010, A review of the genus Oxychalepus Uhmann, 1937 (Coleoptera: Chrysomelidae: Cassidinae), Zootaxa 2573 (1), pp. 35-56 : 45-46

Oxychalepus externus ( Chapuis 1877)

( Figure 8 )

Odontota externa Chapuis 1877: 15 [Syntype: Brazil (INSB)]. Uhmann 1965: 255 (types).

Chalepus externus (Chapuis) . Donckier 1899: 588 (catalog); Blackwelder 1946: 726 (faunal list).

Chalepus (Xenochalepus) externus (Chapuis) . Weise 1911b: 26 (catalog), 1911c: 39 (catalog).

Oxychalepus externus (Chapuis) . Uhmann 1938b: 439 (redescription), 1957a: 108 (catalog), 1964a: 10 (faunal list), 1967: 103 (distribution); Papp 1953: 85 (catalog); Ramos 1998: 311 ( Brazil species).

Xenochalepus confinis Weise 1911a: 48 [type: Brazil, Goyaz, Jatai, depository unknown]. Uhmann 1930a: 33 (distribution), 1935: 56 (faunal list); Spaeth 1937: 144 (faunal list).

Chalepus (Xenochalepus) confinis Weise. Weise 1911b: 26 (catalog), 1911c: 39 (catalog), 1921b: 182 (faunal list); Uhmann 1930a: 33 (distribution).

Chalepus confinis (Weise) . Blackwelder 1946: 726 (faunal list).

Oxychalepus confinis (Weise) . Uhmann 1938b: 439 (redescription, host plant), 1957a: 108 (catalog), 1964a: 10 (faunal list), 1964b: 422 (catalog); Ramos 1998: 311 (synonymy).

Chalepus (Xenochalepus) confinis boliviaca Weise 1911a: 48 [Syntypes: Bolivia, Songo, Corica; Sara, St. Cruz de la Sierra (INSB)]. Weise 1911b: 26 (catalog), 1911c: 39 (catalog); Uhmann 1930a: 33 (note).

Xenochalepus confinis boliviaca (Weise) . Uhmann 1930a: 33 (distribution).

Chalepus confinis boliviaca Weise. Blackwelder 1946: 726 (faunal list).

Oxychalepus confinis boliviaca (Weise) . Uhmann 1957a: 108 (catalog), 1957b: 2 (faunal list).

Odontota ventralis Chapuis 1877: 19 (nomen nudum).

Chalepus ventralis Chapuis (not Guérin-Méneville). Gemminger & Harold 1876: 3614 (catalog); Donckier 1899: 593 (catalog); Weise 1911a: 49 (synonymy).

Xenochalepus ancora Bondar (not Chapuis) 1929: 180 (biology), 1930a: 47 (biology); Lima 1936: 327 (faunal list).

Xenochalepus anchora Bruch 1914: 377 (not Chapuis) (faunal list).

Oxychalepus anchora Monrós & Viana 1947: 248 (not Chapuis) ( Argentina species).

Description. Oblong; parallel-sided; head and antennae black; pronotum yellow, with a medial band attenuate forward and two narrow lateral ones, black; scutellum black; elytra black, with an oval humeral macula and a postmedial band of unparallel borders, yellow; base of the femora yellow (there are forms with the femora entirely yellow and others with the femora entirely black); venter black, with yellow maculae. Head: vertex with three shallow interocular sulci, of which the central one, in its anterior part, is transformed into a carina; eyes slightly prominent. Antenna: antennomeres 1 and 2 subglobose; 3 and 4 of similar length and larger than 2; 5 and 6 similar to each other, shorter than the preceding; 7 similar to 6, its suture with 8 poorly defined; 9– 11 difficult to distinguish; 11 very sharp pointed at apex; 3 to 6 longitudinally striate. Pronotum: transverse, convex; conic; coarsely deeply punctate; with a shallow longitudinal medial sulcus; lateral margin bisinuate; anterior angle with small tooth; pronotal length 1.0– 1.1 mm (n=20); pronotal width 1.8–2.0 mm. Scutellum: transverse; posteriorly rounded. Elytron: lateral margin serrate; exterior apical angle strongly dentate with four strong and robust teeth; widely and cojointly rounded at the apex; costae 1 and 2 parallel, wide in the anterior ½ and narrower in the posterior ½; 3 visible in the humerus and in the apex; 4 narrower than 2; with 10 rows of punctures, scutellar row absent; row of punctures between costae 2 and 4 somewhat confused in middle; elytral length 6.7–6.9 mm; elytral width 2.2–3.0 mm. Total length: 6.1–9.6 mm.

Remarks. This species is distinguished by the elytra without a scutellar row; by the vertex of the head being trisulcate; and by antennomeres 1 and 2 being subglobose.

Host plants. Inga affinis DC. (Mimosaceae) ( Uhmann 1938b); Solanum auriculatum (Solanaceae) . Canavalia ensiformis , C. spontanea , Dioclea sp. , Cimbosema sp., Phaseolus sp. (Fabaceae) ( Monrós & Viana 1947).

Distribution. Argentina, Bolivia, Brazil, Colombia, French Guyana, Paraguay, Peru, Suriname, and Venezuela.

Specimens examined.?: St. Augustine , Trinidad ( USNM) . Argentina. Buenos Aires: Buenos Aires ( USNM) ; Tigre , 20.xi.1938 ( USNM) . Bolivia. No further data ( INSB, DEI) . La Paz: Calisaya ( USNM) ; Chuani ( USNM) ; Chulumani , 10–23.iii.2001 ( USUC) ; Coroico ( DEI) ; Huachi ( USNM) ; Tumupasa , xii ( USNM) ; Sud Yungas, Puente Villa , 4300 ft., 19–24.v.1989 ( FSCA) ; Sud Yungas , 4 km W Chulumani, 5200 ft., 25.v.1989, 26.v.1989, 27.v.1989 ( FSCA) . Pando: Loma Alta , 22.i.1957 ( USNM) . Santa Cruz: Buena Vista , 20.ii.1999 ( FSCA) ; Santa Cruz, 12.iii.1957; Hotel Flora y Fauna, 4–6 km SSE Buena Vista , 400–500 m, xi.10.2003, xi.13.2003 ( USNM) , 2–13.ii.2000, 14–28.x.2000 ( FSCA) ; 5 k ESE Warnes Hotel, Rio Selva , 3– 4.xi.2001 ( FSCA) . Brazil. No further data ( INSB, USNM, DEI) ; Campina , iii.1924 ( BPBM) ; Santarem ( USNM) . Goyas: Campinas ( DEI) ; Jatahy ( USNM, DEI) . Matto Grosso : Corumba ( DEI) ; Serra do Urucum , Corumba, 25.xi.1960 ( DEI) . Minas Gerais: Lambary , 26.xii.1926, xi.1924 ( USNM) ; Piracicaba , ii.1924 ( BPBM) . Pernambuco: Recife, 1936 ( USNM) . São Paulo: ( DEI) ; Campinas , iii.1919 ( USNM) ; Horto Flor. , i.1922, zii.1923 ( USNM) ; Cantareira , 25.xii.1939 ( USNM) ; São Paulo ( DEI) . Rio Grande do Sul: Santaremzinho, Itaitura ( DEI) . Rondonia: 62 km S Ariquemes Fazenda Rancho Grande , 29.ix–10.x.1992, 19– 29.ix.1996 ( LACM) . Santa Catarina: Nova Teutonia, various dates ( BPBM) . Ecuador. Pichincha: 47 km S. Sto. Domingo, Rio Palenque Sta. , 23–31.vii.1978 ( CMNC) . Paraguay. No further data ( DEI) . Alta Parana : Hohenau ( DEI) . Pres. Bocas , ii.1937 ( INSB, DEI) . Peru. Cuzco: Alfamayo , 40 km SE Quillabamba, 8.i.1979 ( USNM) ; Quillabamba , 4.ii.1979 ( USNM) . Ica: Valle Chanchamayo , 800 m, 10.vii.1939 ( DEI) ; Moyobamba , San Martin, 1800 ft., xii.19.1946 ( AMNH) . Lima: Callanga ( DEI) . Madre de Dios: Zona Reserva Manu , Pakitza, 400 m, 4–9.iii.1992 ( USNM) . Suriname. Marowijne: Fluss, xi.1907 ( DEI) . Paramaribo: Paramaribo ( USNM, DEI) . Venezuela. Apure: 3 km E. Achuges, 18.iii.1982 ( USNM) . Bolivar: 19 km SE Upata , 20.iii.1982 ( USNM) . Carabobo: Lago de Valencia , 15.iv.1972 ( USNM) . Cojedes: 10 km E. Apartaderos, 15.iii.1982 ( USNM) . Guárico: Hato Masaguaral , 44 km S. Calabozo, 11–19.v.1985 ( USNM) , 11–19.v.1985 ( BPBM) ; San Juan de los Morros, 26.iv.1938 ( USNM) . Miranda: Estato Miranda, 7.vi.1939 ( USNM) . Tácira: 700 m, 40 km SE Cristobal , 19.v.1974 ( CMNC) ; 500 m, 47 km SE San Cristobal , 21.v.1974 ( CMNC) . Total : 209 .

Figures

FIGURES 5–8. Habitus of Oxychalepus species. 5. Oxychalepus bisignatus. 6. Oxychalepus centralis. 7. Oxychalepus elongatus. 8. Oxychalepus externus.