Oxychalepus externus
Creators: name: Staines, C. L.
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Chrysomelidae
Oxychalepus
Oxychalepus externus

description: 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.
description: Published as part of Staines, C. L., 2010, A review of the genus Oxychalepus Uhmann, 1937 (Coleoptera: Chrysomelidae: Cassidinae), pp. 35-56 in Zootaxa 2573 (1) on pages 45-46, DOI: 10.11646/zootaxa.2573.1.2, http://zenodo.org/record/5303729