Macromalthinus maximiceps Pic, 1919

Biffi, Gabriel & Constantin, Robert, 2018, A revision of Macromalthinus Pic, 1919 with description of six new species (Coleoptera: Cantharidae: Chauliognathinae), Papéis Avulsos de Zoologia (Pap. Avulsos Zool., S. Paulo) 58, pp. 1-22: 17-18

publication ID

http://doi.org/ 10.11606/1807-0205/2018.58.58

persistent identifier

http://treatment.plazi.org/id/03821672-FFCE-1D55-53CD-FF31FF52FB4C

treatment provided by

Valdenar

scientific name

Macromalthinus maximiceps Pic, 1919
status

 

Macromalthinus maximiceps Pic, 1919   ( Fig. 52 View Figures 49-54 , 55-58 View Figures 55-58 )

Macromalthinus maximiceps Pic, 1919: 15   ; Delkeskamp, 1939: 215; Blackwelder, 1945: 369; Delkeskamp, 1977: 467; Brancucci, 1981a: 260; Constantin, 2010a: 41; Constantin, 2010b: 25; Constantin, 2016: 27.

Material examined: LECTOTYPE ♂: [ FRENCH GUIANA] St. Jean du Maroni , collection Le Moult ( MNHN) ( Fig. 52 View Figures 49-54 )   . Other specimens: FRENCH GUIANA. Cayenne, Alicoto- Oyapock, 13.xi.1969, ‘piège lumineux’ (Guyane Mission Balachowsky-Gruner) (1 ♂ NHMB)   ; 30 km S Cayenne, Crossroad N1/D5, XII.2002 -2003, Michael Balke (1 ♀ BMNH 2004-46)   ; Roura , Kaw Rd., 27 km SE, MV light, 21.IV.2007, J.E. Eger coll. (1 ♀ FSCA)   ; idem, 6 km W Montagne des Chevaux , 04°45’N, 52°27’W, 75 m, 05.IX.2015, PVB, P.H. Dalens, F. Robin, F. Sonzogny leg. (1 ♂, 1 ♀ MZSP, 1 ♀ CCo) GoogleMaps   ; idem, 11.VII.2009, PV (1 ♂ CCo) GoogleMaps   ; idem, 20.VIII.2009, PL (1 ♀ CCo) GoogleMaps   ; idem, 06.XII.2009, PV (2 ♀ CCo) GoogleMaps   ; idem, 03.V.2010, PV (2 ♀ CCo) GoogleMaps   ; idem, 01.II.2011,PV(1♂ CCo) GoogleMaps   ; idem, 10.VI.2012, PV (1 ♀ CCo) GoogleMaps   ; idem, 08.VII.2012, Slam, (1 ♂ CCo) GoogleMaps   ; idem, 20.VII.2013,PVB (2 ♀ CCo) GoogleMaps   ; idem, 21.IX.2013, Slam (1 ♀ CCo) GoogleMaps   ; idem, 28.IX.2013, PVB (1 ♀ CCo) GoogleMaps   ; idem, 18.I.2014, PVB (1 ♂ CCo) GoogleMaps   ; idem, 12.IX.2015,PVP(1 ♂ CCo) GoogleMaps   ; idem, 12.IX.2015, PVB (1 ♀ CCo) GoogleMaps   ; idem, 05.XII.2015, PVB (1 ♀ CCo) GoogleMaps   ; Régina , Station des Nouragues, Camp Inselberg, 27.X.2010, PV (1 ♀ CCo)   ; idem, 13.X.2012. PL (1 ♂ CCo)   ; Saint-Elie , Réserve Trinité, Crique Aya, 04°35’N, 53°28’W, 10.XI.2013, light trap with GemLight, P.H. Dalens & J. Touroult (1 ♀ CCo) GoogleMaps   ; Maripasoula , Mont Tabulaire Itoupé, 27.XI.2014, PL (1 ♀ CCo)   ; Maripasoula , Massif de Mitaraka, 06.III.2015, Slam (1 ♀ MNHN)   ; idem, 25.III.2015, alt. 310 m, PL (1 ♀ MNHN)   .

Differential diagnosis: Head black; antennae brown, except antennomeres I-III and VIII-IX, testaceous; pronotum testaceous with a wide median brown patch; elytra entirely dark brown; males: fore femur swollen, with an acute, sharp median ventral tooth; aedeagus with right prolongation of tegmen broadly projected dorsally; left setiferous prolongation elongate, slender; right paramere absent; females: ventrite VII short, wide, posterior margin widely emarginated medially.

Macromalthinus maximiceps   differs from M. guyanensis   sp. nov., M. orapuensis   sp. nov. and M. santaremensis   by the absence of right paramere. It differs from M. belemensis   by the strong and sharp ventral tooth on fore femur of males. Females of M. maximiceps   differ from the other species by the widely emarginated distal margin of ventrite VII.

Additional description: Brancucci (1981a) provided a redescription of M. maximiceps   based only on two male specimens. The study of a larger series of specimens enables the observation of colour variations and the first description of females, given below.

Male: Length: 9.5-10.5 mm. Colouration: Colour pattern of body rather constant,except the extension of the brown median patch on the pronotum.Shape of aedeagus constant.

Females ( Figs. 55-58 View Figures 55-58 ): (new description). Length: 8.1-10.3 mm. Head black. Pronotum with large brown patch surrounded by yellow borders, wider laterally and posteriorly. Elytra reddish brown, with thin apical yellow line, sometimes missing. Legs yellow, apical black marks on femora; meso- and metatarsi brown. Abdominal tergites reddish brown; ventrites yellow, except last one, black. Head 1.25 times wider than pronotum. Frons feebly depressed between eyes. Eyes large but not bulging. Pronotum as long as wide, wider medially, lateral edges slightly constricted behind anterior angles. Elytra 1.4 times longer than wide together at base, contiguous on anterior third; narrowing, concave, divergent posteriorly; apex narrow, swollen, lustrous; elytral surface thinly punctate, covered with short, thin yellowish setae, obliquely bent backwards. Ventrite VII ( Fig. 55 View Figures 55-58 ) short, wider apically, lateral margins straight, posterior margin widely emarginated medially. Tergite VIII ( Fig. 56 View Figures 55-58 ) wider apically, posterior margin roundly emarginated; tergite IX ( Fig. 56 View Figures 55-58 ) small, subtriangular, elongate, apex tapering, incised medially; Stylus of coxites ( Fig. 57 View Figures 55-58 ) slightly constricted at base and apex. Measurements of medium size female: TL: 9.6; AL: 6.9; HW: 1.4; IOW: 0.82; IAW: 0.24; OL: 0.64; PL: 1.12; PW: 1.12; EL: 2.14; EW: 1.54.

Remarks: Females differ from males by having narrow- er head, smaller eyes and frons less depressed between the eyes; antennomeres I-IV narrower,IV-VII slightly compressed; fore femora simple, not toothed; fore tibiae not arched.

Distribution: French Guiana ( Figs. 66, 68 View Figures 66-69 ).

MNHN

Museum National d'Histoire Naturelle

NHMB

Natural History Museum Bucharest

FSCA

Florida State Collection of Arthropods, The Museum of Entomology

MZSP

Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Cantharidae

Genus

Macromalthinus

Loc

Macromalthinus maximiceps Pic, 1919

Biffi, Gabriel & Constantin, Robert 2018
2018
Loc

Macromalthinus maximiceps

Constantin, R. 2010: 41
Constantin, R. 2010: 25
Brancucci, M. 1981: 260
Delkeskamp, K. 1977: 467
Blackwelder, R. E. 1945: 369
Delkeskamp, K. 1939: 215
Pic, M. 1919: 15
1919