A revision of Peltariosilis Wittmer (Coleoptera: Cantharidae), a surprisingly diverse Amazonian radiation
Author
Biffi, Gabriel
Author
Geiser, Michael
text
Papéis Avulsos de Zoologia
2020
Pap. Avulsos Zool., S. Paulo
2020-03-04
60
16
1
26
http://dx.doi.org/10.11606/1807-0205/2020.60.special-issue.16
journal article
10.11606/1807-0205/2020.60.special-issue.16
1807-0205
4984973
3C128243-07E3-4435-A496-D8F50F68389E
Peltariosilis guyanensis
(
Pic, 1906
)
(
Figs. 5B
,
8
E-I, 10B, 12B)
Silis guyanensis
Pic, 1906: 92
;
Delkeskamp 1939: 179
;
Blackwelder 1945: 367
.
Silis
(
Peltariosilis
)
guyanensis,
Wittmer, 1952: 203
;
Delkeskamp 1977: 286
;
Constantin 2010a: 41
.
Peltariosilis guyanensis,
Constantin 2010b: 16
;
2017: 61
.
Type material examined:
LECTOTYPE
♂
(
MNHN
),
new designation:
“Cayene //
SYNTYPE
//
Silis
/ guyanensis /
Pic 1906
/
R
.
Constantin
det. 2009 //
Peltariosilis
/ guyanensis / (Pic) / det.
W.Wittmer
” (
Fig. 8
E-I)
.
PARALECTOTYPE
♂
(
NHMB
): “DÉCEMBRE //
GUYANE
FRANÇSE / St- Laurent du Maroni /
COLLECTION
LE
MOULT
// cotype // Naturhistorisches / Museum Basel / Coll. W. Wittmer //
CANTHARIDAE
/
CANTH
00018168”.
PARALECTOTYPE
♂
(
NHMB
): “
AVRIL
//
GUYANE
/ NOUVEAU CHANTIER / BAS-MARONI // cotype //
Silis
/ guyanensis / Pic // Naturhistorisches / Museum Basel / Coll. W. Wittmer //
CANTHARIDAE
/
CANTH
00017764”.
Other material examined:
“
FRENCH GUIANA
/
Montagne des Chevaux
/
Window trap
;
xi.2009
; 4˚36′37.6″N 52˚16′44.5″W / altitude ~
225 m
a.s.l.
//
BMNH
(E) / 2010-62” (
2 ♂
,
BMNH
)
;
“Zanderij I,
Boven
/
Para Dist.
SURINAM
/
April 19 1927
// Cornell U. / Lot 760 / Sub 28 // Naturhistorisches / Museum Basel /
Coll. W. Wittmer
” (
1 ♂
,
NHMB
)
;
“Zanderij I,
Boven
/
Para Dist.
SURINAM
/
April 26 1927
// Cornell U. / Lot 760 / Sub 41 // Naturhistorisches / Museum Basel /
Coll. W. Wittmer
” (
1 ♂
,
NHMB
)
.
Diagnosis:
Antennae dark brown, yellow at apex of antennomere XI; head entirely black; pronotum and scutellum orange, slightly translucent; elytra black, except for undefined lighter lateral margins and sutures; legs light yellow, except for tarsi, light brown; thorax and abdomen dark brown. Male (
Fig. 5B
): Antennomeres IX-XI narrower than preceding ones.Pronotum (
Fig.10B
):anterior margin broadly arched; frontolateral lobes narrow, projected laterally; sides behind frontolateral lobe convergent posteriorly; laterobasal lobe with dorsal flap long, strongly curved, hook-like projection directed medially and ventral flap forming a sharp lamellar projection; dorsal projections broadly rounded directed posteriorly and laterally. Scutellum (
Fig. 12B
) with a short trapezoidal lamellar projection, wide at base, slightly narrowed at apex, distal margin almost straight, with two slightly projecting tips at angles.
Peltariosilis guyanensis
differs from
P. mensaemontis
by the apex of dorsal flap of laterobasal lobe of pronotum, forming a sharp hook direct- ed internally.
Distribution:
Suriname
,
French Guiana
(
Fig. 18
).
Remarks:
Pic (1906)
described this species from an unspecified number of males from “Cayenne”. We found
three male
specimens at MNHN and NHMB, all with different locality data, which we here consider part of the original type series. This includes a specimen at NHMB cited as a non-type by
Constantin (2010a)
, which however bears a “cotype” label in Pic’s handwriting. The male
syntype
at MNHN, in Pic’s own collection, is here designated as the
lectotype
.