Dichotomius (Luederwaldtinia) opalescens ( Felsche, 1910 )

Maldaner, Maria E., Nunes, Rafael V. & Vaz-De-Mello, Fernando Z., 2015, Taxonomic revision of the Dichotomius speciosus (Waterhouse, 1891) species group (Coleoptera: Scarabaeidae: Scarabaeinae), Zootaxa 3986 (5), pp. 549-560 : 553-555

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https://doi.org/ 10.11646/zootaxa.3986.5.2

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Dichotomius (Luederwaldtinia) opalescens ( Felsche, 1910 )


Dichotomius (Luederwaldtinia) opalescens ( Felsche, 1910) View in CoL

( Fig. 3 View FIGURE 3 )

Pinotus speciosus Waterhouse View in CoL pro part: Felsche 1901: 145 (misidentification);

Pinotus opalescens Felsche 1910: 342 View in CoL (original description); Gillet 1911: 61 (catalog); Blackwelder 1944: 207 (checklist);

Dichotomius (Luederwaldtinia) bucki Pereira 1953: 290 View in CoL –293 (original description); Vaz-de-Mello 2000: 193 (checklist); new synonym;

Dichotomius (Luederwaldtinia) opalescens View in CoL ; Vaz-de-Mello 2000: 193 (citation)

Specimens studied. Types: of P. opalescens View in CoL : Lectotype here designated: ♂ Coll. Nonfried. BRASILIA / Typus / Coll. C. Felsche Kauf 20, 1918 / opalescens Felsche View in CoL Brasilien [SMTD]. Paralectotypes: 3 ♂ 1 ♀: same as lectotype but without identification label (♂1, ♂2 and ♀); Brasilien St. Catharina (♂3). See remarks below.

Of D. bucki View in CoL : Holotype: S. F. Paula 1.35 / HOLÓTIPO / Dichotomius View in CoL bucki View in CoL sp. n. P. Pereira det.953 [MZSP]. Allotype and paratypes: same locality (20 specimens MZSP; 1♂ 1 ♀ NHML; 1♂ 1 ♀ IRSN).

Non-type material. BRASIL: Rio Grande do Sul: São Francisco de Paula. FLONA, floresta ombrófila mista. Hum. faec. 13.I.2008. L. Audino [6♂ 8♀ CEMT]; same locality but FLONA, eucalipto. 13.I.2008 [♂ ♀ CEMT]; same locality but FLONA, PROMATA. 10–13.XII.2009. P. C. Grossi [♀ CEMT]; Taimbezinho. Parque Nacional dos Aparados da Serra. II.1960 [♀ CEMT]; Cambará do Sul. 06.I.1985 [♂ CEMT]; Santa Catarina: Bom Jardim da Serra. Mantiqueira. 03.I.2002. C. Arioli [13♂; 6♀ CEMT]; same locality XII.2001 [♂ 2♀ CEMT]; Urubici. P. N. São Joaquim. 16–19.III.2012. - 28.1206S /- 49.4943W. Grossi, Parizotto & Leivas. [♂ 3♀ CEMT].

Diagnosis. Within the group, D. opalescens is the only species bearing the following combination of characters: body surface blue to bluish green with some individuals having reddish brown elytra ( Fig. 3 View FIGURE 3 A–B, 6); males cephalic carina bearing one acute tubercle at each end; male pronotum bearing a centrally projected lobe, with a longitudinal sulcus producing a pair of tubercles ( Fig. 3 View FIGURE 3 A). This species has a detailed published description made by Pereira (1953) under D. bucki .

Remarks. Felsche (1901) cited that his specimens of P. speciosus had colors different from those described by Waterhouse (1891): Those of Felsche were entirely grayish blue or blue with brown elytra ( Fig. 6 View FIGURE 6 ), and he first considered this as a color variation within D. speciosus . Nine years later, Felsche (1910) reinterpreted these variations considering these specimens to be the types of the new species P. opalescens . Pereira (1953), considered that maybe D. speciosus and D. opalescens were synonymous, because the specimens he analyzed came from the same location, and he thus described D. bucki as a new species. Examination of the types of D. opalescens allowed us to resolve the correct application of this last name, relegating D. bucki to synonymy. The syntype ♂1 (here considered as paralectotype) of P. opalescens is in fact a specimen of D. alvarengai new species. Paralectotype ♂2 is blue with red/brown elytra, a color variation that may be characteristic of younger/teneral individuals ( Fig. 6 View FIGURE 6 ).

Distribution. Above 1000 meters in the Serra Geral mountain range, known from the south of the state of Santa Catarina and north of the state of Rio Grande do Sul, but could be present also in northern areas of Santa Catarina and Southern Paraná states ( Fig. 7 View FIGURE 7 A, C).














Dichotomius (Luederwaldtinia) opalescens ( Felsche, 1910 )

Maldaner, Maria E., Nunes, Rafael V. & Vaz-De-Mello, Fernando Z. 2015

Dichotomius (Luederwaldtinia) bucki

Pereira 1953: 290

Pinotus opalescens

Blackwelder 1944: 207
Gillet 1911: 61
Felsche 1910: 342

Pinotus speciosus

Felsche 1901: 145
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