Plochionocerus janthinus ( Erichson, 1847 )

Asiain, Julieta, Márquez, Juan & Morrone, Juan J., 2007, Phylogenetic systematics of the genera Plochionocerus Dejean and Agrodes Nordmann (Coleoptera: Staphylinidae: Xantholinini), Zootaxa 1584, pp. 1-53 : 22-23

publication ID

https://doi.org/ 10.5281/zenodo.178410

DOI

https://doi.org/10.5281/zenodo.6246779

persistent identifier

https://treatment.plazi.org/id/965DBB53-FFDE-5A62-2399-FD1E76E35264

treatment provided by

Plazi

scientific name

Plochionocerus janthinus ( Erichson, 1847 )
status

 

Plochionocerus janthinus ( Erichson, 1847) View in CoL

Agrodes janthinus Erichson, 1847: 88 ; Bernhauer & Schubert, 1914: 315 ( Sterculia View in CoL ); Herman, 2001: 3745 ( Plochionocerus View in CoL ).

Sterculia peruviana Bernhauer, 1907: 284 View in CoL ; Herman, 2001: 3746 ( Plochionocerus View in CoL ), syn. nov.

Type material (2 specimens). Lectotype of Agrodes janthinus by present designation, female: “5796 / Peru mont. Phil / janthina / Hist. Coll. ( Coleoptera ) Nr. 5796 Sterculia janthina N. Peru mont., Phil. Zool. Mus. Berlin / Syntypus Agrodes janthinus Erichson, 1847 labelled by MNHUB 2006 / janthina Er */ Lectotype Agrodes janthinus Asiain, Márquez & Morrone des. 2007” ( ZMHB). Holotype of Sterculia peruviana , male: “Callanga, Perú / occidua Fvl. Det. Fauvel. Bang-Hass determ. M. Bernh. / peruviana Brh. Typus / Chicago NHMus M. Bernhauer Collection” ( FMNH).

Additional material (23 specimens). BOLIVIA: Coroico, 1800 m, X–XII.1906, Gerlopp, Fassl ( BMNH, Ψ; FMNH, Ψ); Rio Bongo, 750 m, Fassel ( FMNH, Ψ); Cochabamba, 109 km E Yungas (Cochabamba-Villa Tunari Rd), 1480 m, 17°8’59”S, 65°42’29”W, 8–12.II.1999, R. Anderson, ex: transition montane forest cloud litter ( SEMC, ɗ); Cochabamba, 117 km E, Yungas, Lagunitas, 1000 m, 17°6’22”S, 65°40’57”W, 1–6.II.1999, F. Genier, ex: flight intercept trap ( SEMC, ɗ); San Antonio ( BMNH, ɗ); Songo ( BMNH, ɗ); Yungas ( IRSNB, 3ΨΨ). PERU: Chanchamayo, 1500 m, Hogne ( FMNH, Ψ); Chanchamayo, Rolle ( AMNH, Ψ); Chanchamayo ( FMNH, Ψ); Poguzo, Rolle (CC-UAEH, ɗ); no locality data ( BMNH, ɗ; FMNH, Ψ; IRSNB, Ψ); Chanchamayo, 1899, E. Viale, D. Batian ( FMNH, Ψ); Depto. Cuzco, km 165 on Cosnipata Hwy., 1200 m, Cosnipata Vly., 13.X–25.XI.1981, tropical forest, J. Fitzpatrick & D. Willard ( FMNH, ɗ); Upper Rio Huallaga, 3.X.1929 ( AMNH, ɗ); Rio Santiago, 21.XI.1924 ( AMNH, Ψ); Huanuco, Piedras Grandes, 2500–3600 m, 22.XI.1937, F. Woytkowski ( SEMC, ɗ); Callanga ( IRSNB, ɗ).

Diagnosis. Total length 22.5–27.2 mm; metallic violet-blue with green or violet-blue reflections and green abdomen; head rectangular, 1.31–1.49 times as long as wide, moderately wider than pronotum (1.15– 1.29 times), dorsally and ventrally flat (similar to Fig. 13 View FIGURES 9 – 16 ), ventral surface with moderately dense, expanded, umbilicate punctures (10–19 in each half of head), arranged in “v” (similar to Fig. 50 View FIGURES 48 – 53 ); apical antennomere in males moderately longer than wide (1.33–1.70 times) and shorter than antennomeres 9+10 combined (0.88– 0.93 times their length); mandibles with basal external channel ( Fig. 63 View FIGURES 63 – 66 ). Pronotum long (length/width: 1.50– 1.64); shorter than elytra (0.79–0.85 times their length); with two slightly visible, depressed areas in posterior third; prosternum moderately transverse (length/width: 0.82–0.91); aedeagus ovate, with basal half curved, length 3.2–3.9 mm, with parameres moderately long (0.33–0.41 times as long as the median lobe), apical area of median lobe 0.30–0.35 times as long as the total length of median lob, and internal sac moderately visible ( Fig. 84 View FIGURES 79 – 87 ).

Variation. Usually the head is narrowed from the posterior angles toward the neck; and that the umbilicate punctures on the dorsal area of the head constitute deep cells, like a honeycomb. Some punctures on the pronotum are wider than the remaining fine punctures.

Comparative notes. Based on the revision of the holotypes, P. peruvianus ( Bernhauer, 1907) is a junior synonym of P. janthinus ( Erichson, 1847) . The species can be confused with other species, such as some specimens of P. impressipennis , with a rectangular, dorsally and ventrally flattened head. The apical antennomere in males of both species is shorter than antennomeres 9+10 combined, the length/width proportions of the head and pronotum are similar, and both have moderately dense, expanded, umbilicate punctures on the ventral surface of head. They can be distinguished because in P. janthinus the head is moderately wider than the pronotum, some punctures are wider on the pronotum and the aedeagus is moderately longer, with its base curved and with a moderately visible internal sac.

Geographical distribution. Peru and Bolivia ( Herman 2001).

FMNH

Field Museum of Natural History

SEMC

University of Kansas - Biodiversity Institute

IRSNB

Institut Royal des Sciences Naturelles de Belgique

AMNH

American Museum of Natural History

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Staphylinidae

Genus

Plochionocerus

Loc

Plochionocerus janthinus ( Erichson, 1847 )

Asiain, Julieta, Márquez, Juan & Morrone, Juan J. 2007
2007
Loc

Sterculia peruviana

Herman 2001: 3746
Bernhauer 1907: 284
1907
Loc

Agrodes janthinus

Herman 2001: 3745
Bernhauer 1914: 315
Erichson 1847: 88
1847
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