Pygodiscodon apicicornis ( Pic, 1910 )

Biffi, Gabriel & Constantin, Robert, 2018, Taxonomic revision of Pygodiscodon (Coleoptera: Cantharidae), Acta Entomologica Musei Nationalis Pragae 58 (1), pp. 77-90 : 80-81

publication ID

https://doi.org/ 10.2478/aemnp-2018-0008

publication LSID

lsid:zoobank.org:pub:CA1ECED6-3669-4FB5-8BF9-734CBC551131

DOI

https://doi.org/10.5281/zenodo.3681351

persistent identifier

https://treatment.plazi.org/id/03E1EC1D-FD47-D877-3C98-24DF7AC34286

treatment provided by

Tatiana

scientific name

Pygodiscodon apicicornis ( Pic, 1910 )
status

 

Pygodiscodon apicicornis ( Pic, 1910)

( Figs 1 View Figs 1–6 , 7 View Figs 7–12 , 17–19 View Figs 17–25 , 35 View Figs 35–40 , 41–43 View Figs 41–49 )

Discodon apicicorne Pic, 1910: 43 (original description). DELKESKAMP (1939): 155 (catalogue); BLACKWELDER (1945): 364 (catalogue); DELKESKAMP (1977): 246 (catalogue).

Pygodiscodon apicicorne : CONSTANTIN (2010b): 12 (faunistics), CONSTANTI(2017): 64 (key).

Type locality. French Guiana, St Laurent du Maroni, fixed by the present lectotype designation.

Type material examined. Discodon apicicorne Pic, 1910: LECTOTYPE:, present designation: ‘ Guyane Française | St Laurent | du Maroni || collection Le Moult || Discodon apicicorne n sp [handwritten] || type [handwritten]’ ( MNHN). PARALECTOTYPES: 1 ♀, ‘ Guyane Française | Nouveau Chantier || collection Le Moult’ ( MNHN); 1 ♀, ‘Charvein, Guyane Fr. [handwritten]’ ( MNHN).

Additional material examined. GUYANA: Mazaruni (Clearing), 23.viii.1937, 1; 28.viii.1937, 1; 20.ix.1937, 1, Richards & Smart leg. ( BMNH, 1937-776); 2 nd Growth (Low Forest), 19.viii.1937, 1, Richards & Smart leg. ( BMNH, 1937-776); Kaieteur (Savannah), 5.ix.1937, 1, Richards & Smart leg. ( BMNH, 1937-776); Essequibo River (1 st Falls), 4.x.1929, 1, Oxf. Univ. Exped. leg. ( BMNH, 1929- 485); Kartabo, vi.1922, 1, M. D. Haviland leg., d.d. Collegium Newnhamense ( BMNH, 2012-16). SURINAME: CORONIE: Tottnes (nr airstrip) [5.883369, -56.314974], 9.vi.1963, 1, J & E v d Vecht-B leg.( RMNH); GoogleMaps Moengo [5.607838, -54.399491], 10.iv.1939, 1, Geijskes leg.( RMNH); GoogleMaps Onverwacht, Biliton [5.605469, -55.140245], 29.xi.1968, 1, 1.xii.1968, 1 P. H. v Doesburg Jr. leg. ( RMNH); GoogleMaps Republiek, 6.–11.v.1963, 1, P. H. v Doesburg Jr.leg. [5.494946, -55.206944] ( RMNH), GoogleMaps 6.–16.v. 1963, 3 2 ♀♀, J & E v d Vecht-B ( RMNH); [ 5.495459, -55.206514] v.1963, 1 ♀ (Malaise-trap), J. v d Vecht leg. ( RMNH); GoogleMaps Copieweg, nr Lelydorp, 28.vii.1978, 1, A. van Assen [5.666669, -55.233331] ( RMNH). GoogleMaps FRENCH GUIANA: Réserve Trésor, 04°36 ′ 37.6 ″ N, 52°16 ′ 44.5 ″ W, cca 225 m, xii.2009 8 (window trap), S. Brûlé leg. ( BMNH, 2010- 62); GoogleMaps Montagne des Chevaux, 6 km W of Roura, 4°43 ′ N, 52°25 ′ W, 93 m, 6.vi.2009, 1 (window trap), S. Brûlé, P. Dalens & E. Poirier leg. ( MZSP, 5271); GoogleMaps Station Nourages, saut Pararé, 4°01 ′ N, 52°41 ′ W, 120 m, 23.xi.2009, 1 ♀ (window trap), P. H. Dalens, S. Brûlé & E. Poirier leg. ( MZSP, 5272); GoogleMaps 4°02 ′ 16.1 ″ N, 52°40 ′ 21.1 ″ W, x.2009, 1 ♀ (window trap), S. Brûlé leg, ( BMNH, 2010-62). GoogleMaps

Additional published records. FRENCH GUIANA: Haute-Camopi, Mont Saint-Marcel 2°23 ′ 03 ″ N, 53°00 ′ 37 ″ W ( CCO); GoogleMaps Mana,Angoulême, 5°24 ′ N, 53°39 ′ W ( CCO); GoogleMaps Maripa-Soula-Massif de Mitaraka, camp de base, 2°14 ′ 1 ″ N, 54°27 ′ 38 ″ W, 300 m a.s.l. ( MNHN, CCO); GoogleMaps Maripa-Soula, Mont Tabulaire Itoupé, 3°01 ′ 20 ″ N, 53°05 ′ 41 ″ W, 600 m a.s.l., ( CCO); GoogleMaps Matoury, Mont Grand-Matoury, 4°51 ′ N, 52°21 ′ W ( CCO); GoogleMaps Saint-Elie, Réserve de la Trinité, savane-roche de la Haute-Koursibo, 4°19 ′ N, 53°17 ′ W ( CCO); GoogleMaps Saint-Laurent du Maroni, village Espérance, 5°25 ′ N, 54°03 ′ W ( CCO); GoogleMaps Saül, belvédère de la Montagne Pelée, 3°37 ′ 22 ″ N, 53°12 ′ 57 ″ W ( CCO). GoogleMaps All published by CONSTANTIN (2010b).

Description. Body length: 5.1–6.7 mm. Head black, dark brown behind eyes; frons, clypeus and base of mandibles light brown to testaceous, slightly translucent; apex of mandibles light brown; palpi dark brown.Antennae black; first antennomere slightly lighter ventrally and antennomeres IX–X and base of XI yellowish-white. Pronotum pale yellow with wide medial black patch stretching longitudinally from anterior to posterior margins. Elytra, thorax and abdomen dark brown; legs light brown, darker from middle of tibiae.

Male ( Fig. 1 View Figs 1–6 ): Head as long as wide, broadly rounded behind eyes, densely pubescent; occipital region and frons convex; clypeus wide, emarginated anteriorly. Eyes rounded, rather prominent. Maxillary palpi elongate, last palpomere slender and slightly securiform. Antennae ( Fig. 7 View Figs 7–12 ) long, slightly serrate and compressed dorso-ventrally; dorsal surface of antennomeres IV to VI with irregular longitudinal line, not straight, varying in length and width. Pronotum densely pubescent, transverse, 1.6 times wider than long; lateral margins slightly emarginated, explanate upwards and shortly notched before basal angles. Elytra finely rugulose, densely covered with erect brownish setae; each elytron 4.5 times longer than wide. Legs slender; tarsomeres increasing in size from pro- to metathoracic legs; inner claw of prothoracic legs broadly lamellate at base; meso- and metathoracic tarsal claws with sharp protruding tooth. Last abdominal ventrite ( Fig. 17 View Figs 17–25 ) bilobed, broadly rounded posteriorly; abdominal tergite VIII ( Figs 17–19 View Figs 17–25 ) elongate, with shallow latero-posterior compressions and strongly constricted posteriorly, forming narrow apical projection bearing two contiguous glandular openings at apex; dorsal surface of apical projection with pair of parallel ridges and short median tooth. Aedeagus ( Figs 41–43 View Figs 41–49 ): ventral wall of tegmen long and broad, lateral sides slightly convergent, apical margin rounded; short setae along lateral and apical margins and in narrow longitudinal fringe ventrally; parameres long, surpassing dorsal margins of tegmen; apex obtuse, bearing a few long setae; median lobe broad and membranous; internal sac short, partially exposed beyond median lobe, with two pairs of sclerites; ventral sclerites laterally flattened, apex rounded with tip pointing dorso-laterally; dorsal sclerites long, slender, dorsally curved, apex rounded.

Female: similar to male but antennae lacking longitudinal lines; pronotum not notched laterally; tarsal claws simple; abdominal ventrite VII ( Fig. 35 View Figs 35–40 ) 1.9 times wider than long, not divided, lateral margins arched, distal margin with small projecting tip; abdominal tergite VIII broad and simple.

Differential diagnosis. Similar to P. obscurus and P. similis sp. nov. in colour pattern. Elytra and pronotal patch darker; last abdominal tergite of males narrower with pair of dorsal longitudinal ridges culminating in small, acute, upwards-pointing tooth.

Distribution. Guyana, Suriname and French Guiana ( Figs 59–60 View Figs 59–60 ).

MNHN

Museum National d'Histoire Naturelle

RMNH

National Museum of Natural History, Naturalis

MZSP

Sao Paulo, Museu de Zoologia da Universidade de Sao Paulo

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Cantharidae

Genus

Pygodiscodon

Loc

Pygodiscodon apicicornis ( Pic, 1910 )

Biffi, Gabriel & Constantin, Robert 2018
2018
Loc

Pygodiscodon apicicorne

CONSTANTIN R. 2017: 64
CONSTANTIN R. 2010: 12
2010
Loc

DELKESKAMP K. 1977: 246
BLACKWELDER R. E. 1945: 364
DELKESKAMP K. 1939: 155
PIC M. 1910: 43
1910