Dichotomius (Luederwaldtinia) irinus ( Harold, 1867 )

Valois, Marcely C., Vaz-De-Mello, Fernando Z. & Silva, Fernando A. B., 2017, Taxonomic revision of the Dichotomius sericeus (Harold, 1867) species group (Coleoptera: Scarabaeidae: Scarabaeinae), Zootaxa 4277 (4), pp. 503-530: 511-514

publication ID

https://doi.org/10.11646/zootaxa.4277.4.3

publication LSID

lsid:zoobank.org:pub:7545001C-720C-41E4-99B5-39146C291D7B

persistent identifier

http://treatment.plazi.org/id/343487EE-2108-FFEF-FF08-FF2EFD9F2A6A

treatment provided by

Plazi

scientific name

Dichotomius (Luederwaldtinia) irinus ( Harold, 1867 )
status

 

Dichotomius (Luederwaldtinia) irinus ( Harold, 1867) 

( Figs 3View FIGURE 3 a –h, 10b, 11f, 12b)

Pinotus irinus Harold, 1867: 97  ; Felsche, 1901a: 140 (identification key); Luederwaldt, 1929: 82 (identification key and diagnosis); Blackwelder, 1944: 207 (checklist).

Dichotomius irinus  : Vaz-de-Mello, 2000: 193 (checklist).

Material examined. Type material, Pinotus irinus Harold  , Lectotype ♂ (here designated; MNHN). 1. [old white label, bordered in red, Harold's handwritten] Nov. Frib. Columb. P. irinus Harold  / 2. [white label, bordered in black, printed in black] Ex — Musaeo, E. Harold/ 3. [green label, small] Museum Paris, ex Coll., R. Oberthur/ 4. [red label, bordered and printed in black, handwritten] Lectotype ♂, Pinotus irinus Har.  , des. F. Z. Vaz-de-Mello, 2014.

Non-type material [278 males and 295 females]. BRAZIL: BAHIA: Cruz das Almas, [39°06'18.8"W; 12°39'57.1"S], I.2005, Ribeiro Junior & G. R. Brito — 4♂ 5♀ ( CEMT), Embrapa [Empresa Brasileira de Pesquisa Agropecuária], III.1999, O. Meira — 1♂ 2♀ ( CEMT)GoogleMaps  ; Porto Seguro , [16°25'46.2"S 39°03'55.5"W], VII.1992, E. Grossi — 1♂ 1♀ ( CEMT)GoogleMaps  , same data but VII.1990, E. Grossi — 1♂ ( CEMT)GoogleMaps  ; Caetité , [42°29'27.5"W; 14°04'05.5"S], C. Uran. Lagoa Real — INBAbout INB, I.2000, Nessimian & Baptista — 1♀ ( CEMT)GoogleMaps  ; Boa Vista do Tupim [40°36'16.2"W; 12°39'37.6"S], Fazenda morro de pedra, III.2010, Ulisséa — 8♂ 9♀ ( CEMT)GoogleMaps  ; Milagres, Caatinga Arbórea , [12°54,537' S, 39°51,272' W], 7.I.2011, Medina, A. Campos, M. & Ulysséa, M.  — 1♀ ( CEMT)GoogleMaps  ; Lençóis , [12°34'09.4"S, 41°23'27.6"W], Marimbos, 13.X.2003, P.P. Lopes — 1♂ ( CEMT)GoogleMaps  ; Feira de Santana , [12°15'28.0"S, 38°57'58.4"W], VI.1995, P.P. Lopes — 1♀ ( CEMT)GoogleMaps  ; Senhor do Bonfim, Serra Maravilha , (10°23,950'S, 40°12,495'W), 8.X.2005, P.P. Lopes — 1♂ ( CEMT)GoogleMaps  ; ESPÍRITO SANTO: Anchieta , (40°35'36"W; 20°46'10"S), XII.2010, M.F. Souza — 20♂ 13♀ ( CEMT)GoogleMaps  ; Cachoeira do Itapemirim , [20°46'36.0"S, 41°09'34.9"W], I.1998, J. Louzada — 4♂ 3♀ ( CEMT)GoogleMaps  , same data but Usina Paineiras , I.2007, J. Louzada — 8♂ 11♀ ( CEMT)GoogleMaps  , same data but VIII.1994, J. Louzada — 1♂ 1♀ ( CEMT)GoogleMaps  , same data but I.1995, J. Louzada — 15♂ 18♀ ( CEMT)GoogleMaps  , same data but VIII.1994, J. Louzada — 19♂ 9♀ ( CEMT)GoogleMaps  ; Linhares, Parque Nacional Sooretama , [39°56'42.1"W; 19°25'09.6"S], X.1962, Martínez — 2♂ 2♀ ( CMNAbout CMN)GoogleMaps  ; same data but Reserva Florestal Vale do Rio Doce , IX.1996, J. S. Santos — 31♂ 22♀ ( CEMT)GoogleMaps  , same data but VII.1996, J. S. Santos — 32♂ 57♀ ( CEMT)GoogleMaps  , same data but IX.2012, R. C. Lima — 3♂ 5♀ ( CEMT)GoogleMaps  , same data butFazenda Santa Terezinha , Caliman Agrícola S /A, X.2002, P.C. Grossi — 1♂ 3♀ ( CEMT)GoogleMaps  , same data but Fazenda Lagoa do Macuco , [38°39'43"W; 19°03'50"S], I.2000, F. Genier & S. Ide — 13♂ 12♀ ( CMNAbout CMN)GoogleMaps  ; Marataízes , [40°50'29.3"W; 21°02'25.2"S], I.2007, L. Vieira — 6♂ 12♀ ( CEMT)GoogleMaps  ; Presidente Kennedy, [41°02'49.9"W; 21°05'48.6"S], Praia de Marobá , II.1993, E. Grossi — 2♂ 6♀ ( CEMT)GoogleMaps  , same data but I.2007, J. Louzada — 24♂ 29♀ ( CEMT)GoogleMaps  ; Regência , [39°53'05"W; 19°39'57"S], I.2007, L. Vieira — 18♂ 12♀ ( CEMT)GoogleMaps  ; Venda Nova do Imigrante , [40°22'12.4"W; 20°26'18.8"S], II.1989, E. J. Grossi — 1♂ ( CEMT)GoogleMaps  ; Vila velha, Barra do Jacú , [40°22'12.4"W; 20°26'18.8"S], VIII.2004, Schiffler — 5♂ 4♀ ( CEMT)GoogleMaps  ; Vitória, Parque Estadual da Fonte Grande , [40°19'55.0"W; 20°17'57.8"S], IX.2004, Bravim, Parnagnani & Schiffler — 2♂ 3♀ ( CEMT)GoogleMaps  ; Venda Nova , XI.1991, E. Grossi — 1♂ 1♀ ( CEMT)  . MINAS GERAIS: Açucena , [42°32'33.6"W; 19°03'57.6"S], II.1957, A. Machado — 1♂ ( CEMT)GoogleMaps  ; Águas Vermelhas , [41°27'12.9"W; 15°44'11.8"S], XII.1997, Vaz-de-Mello & Bello — 20♂ 17♀ ( CEMT)GoogleMaps  ; same data but XII.1998, F. Vaz-de-Mello — 2♂ 2♀ ( CEMT)GoogleMaps  ; XII.1997 — 2 ♂ (CEMT); Diamantina, Campus  UFVJM, [Universidade Federal dos Vales do Jequitinhonha e Mucuri ], [43°36'28.5"W; 18°14'32.6"S], I.2005, S. Lassis Jr. — 17♂ 13♀ ( CEMT)GoogleMaps  ; Ipatinga , [42°36'36.7"W; 19°24'57.9"S], XI.1991, E. Grossi — 1♂ 4♀ ( CEMT)GoogleMaps  , same data but XI.1992 — 4 ♂ 7♀ ( CEMT)GoogleMaps  , same data XII.1992 — 1 ♂ ( CEMT)GoogleMaps  ; Marliéria , [42°44'12.1"W; 19°42'33.4"S], VII.1992, F. Vaz-de-Mello — 2♀ ( CEMT)GoogleMaps  . RIO DE JANEIRO: Cabo Frio , [41°57'06.7"W; 22°48'11.2"S], I.1991, E. Grossi — 1♂ 1♀ ( CEMT)GoogleMaps  ; Guapimirim, [close to Guapim-açu river ], (42°53'20"W; 22°34.96'S), IV.2013, T. Carvalho & Muzêda — 2♀ ( CEMT)GoogleMaps  ; Jardim Botânico , [43°13'30.1"W; 22°58'02.3"S], II. 1992, F. Vaz-de-Mello — 1♂ 2♀ ( CEMT)GoogleMaps  , same data but II.1991 — 1 ♂ ( CEMT)GoogleMaps  ; Parque Lage , II.1992, F. Zagury — 3♂ 3♀ ( CEMT)  , same data but II.1991 — 1 ♀ ( CEMT)  ; Floresta da Tijuca , [43°17’10.3”W; 22°56’46”S], II.2009, W. Beiroz- 1♂ ( CEMT)GoogleMaps  .

Diagnosis. Dichotomius irinus  are similar to D. schiffleri  in having the disc of the pronotum and pygidium with ocellate punctures ( Figs 3View FIGURE 3 d, 11g). However, it can be distinguished by: pronotum convex in lateral view (as in Fig. 11View FIGURE 11 a); clypeofrontal suture with conical horn ( Figs 3View FIGURE 3 b –c); male clypeal surface almost smooth, with weaklydefined transversal ridges on the anterior portion ( Fig. 3View FIGURE 3 b).

Redescription. Length: 12–16 mm. Body black with weak bluish sheen ( Fig. 3View FIGURE 3 a). Head: male genal surface with ocellate punctures separated from each other by approximately half their diameter ( Fig. 3View FIGURE 3 b). Dorsal interocular surface with slight depression on its central portion; surface covered by ocellate punctures, denser near to the eyes; punctures spaced by less their diameter ( Fig. 3View FIGURE 3 b). Pronotum: convex in lateral view. Disc with ocellate punctures spaced by approximately twice their diameter ( Fig. 3View FIGURE 3 d). Anterior margin with row of large punctures, absent only medially. Posterior margin with row of large ocellate punctures. Margination of posterior border with large and dense punctures near posterior angles. Hypomera: posterolateral portion with dense elliptical and setigerous punctures spaced by less than their diameter, some punctures touching. Metasternum: disc smooth; anterior lobe with setigerous punctures, larger with long setae near inner margin of mesocoxae. Elytra: surface of interstriae shiny and punctate, punctures noticeable at high magnification ( Fig. 5View FIGURE 5 e). Elytral striae deeply impressed ( Fig. 5View FIGURE 5 e). Legs: ventral surface of profemur with large ocellate and setigerous punctures, usually denser near the apical half. Anterior and posterior margin of profemur finely sulcated; sulcus surface with well-defined microsculpture. Posterior margin of meso and metafemur with longitudinal sulcus; sulcus approximately one-fifth as wide as the femur ( Fig. 11View FIGURE 11 d). Ventral surface of mesofemur with setigerous punctures on apical half. Ventral surface of mesotibia with row of setae toward the body restricted to the apical third of the mesotibia ( Fig. 11View FIGURE 11 f, arrow). Abdomen: medial portion of sternites shiny or with a single row of punctures on anterior margin; lateral portion with rounded and dense ocellate punctures on anterior half. Male medial portion of sixth sternite as long as half of the fifth. Pygidium: slightly wider than long. Aedeagus: parameres subtriangular, 2/3 as long as the phallobase. ( Figs 3View FIGURE 3 f –h). [lateral view] — dorsal margin of parameres strongly curved outward on apical half ( Fig. 3View FIGURE 3 f). Ventral margin of parameres slightly curved inward on basal-third and apical two-thirds; curves separated by a convex portion ( Fig. 3View FIGURE 3 f). [ventral view] — inner margins of parameres slightly curved outward ( Fig. 3View FIGURE 3 g). [dorsal view] — basal portion of parameres wider than apical portion ( Fig. 3View FIGURE 3 h). External margins of parameres slightly expanded toward apex ( Fig. 3View FIGURE 3 h). Inner margins subparallel ( Fig. 3View FIGURE 3 h). Endophallus: lamella copulatrix — Projection square-shaped; superior portion slightly curved outward; lateral portion straight ( Fig. 10View FIGURE 10 b). Secondary sexual characters: females differ from males as follows: clypeal and genal surface with strong transversal ridges; clypeal teeth more acute ( Fig. 3View FIGURE 3 c); medial portion of sixth sternite as long as the fifth.

Remarks. In the original description the type locality reported was “Cayennae”, without additional information ( Harold, 1867). However, the label of the type species indicates “Nov. Frib.” [Nova Friburgo, Rio de Janeiro] as the type locality. Indeed, D. irinus  is distributed in the southeastern parts of the Brazilian Atlantic Forest and Restinga from Bahia, Espírito Santo, Minas Gerais and Rio de Janeiro states. Data from Cayennae probably corresponds to mislabeled specimens.

INB

Instituto Nacional de Biodiversidad

CMN

Canadian Museum of Nature

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Scarabaeidae

Genus

Dichotomius

Loc

Dichotomius (Luederwaldtinia) irinus ( Harold, 1867 )

Valois, Marcely C., Vaz-De-Mello, Fernando Z. & Silva, Fernando A. B. 2017

2017
Loc

Pinotus irinus

Blackwelder 1944: 207
Luederwaldt 1929: 82
Felsche 1901: 140Harold 1867: 97

1901