Genus Parasilvanus Grouvelle Coleoptera - Tarsen-5-5-5 - Cucujidae_fhl - Silvanidae - Silvaninae@en
  By D.G.H. Halstead (rearranged by Arved Lompe)
If you find any errors or omissions please mail me at mailbox@lompe.de
Halstead, D.G.H. (1973 ): A Revision of the Genus Silvanus Latreille (s. l.) (Coleoptera : Silvanidae) - Entomology - Bulletin of the British Museum (Natural History), 29:39-112 Private Datei: F:\taxa\coleo\scans\halstead1973 Silvanus.pdf
#1 Head and pronotum punctate-reticulate [fig.1]; elytra punctate-striate, all interstriae equally raised [fig.2]; head and pronotum as in [fig.3].

   ...mimosae Halstead, 1973

PARASILVANUS MIMOSAE
fig.1
PARASILVANUS MIMOSAE
fig.2
PARASILVANUS MIMOSAE
fig.3
 
-- Head and pronotum not punctate-reticulate, either interspaces much broader or puncturation entirely different; elytra different; head and pronotum not as above.

   ...2

 
#2 Head appearing finely granulate due to densely reticulate interspaces, clypeus and frontal triangle with sparse puncturation [fig.4] different from that near eyes; without a fovea at clypeogenal emargination; 8th antennal segment as in [fig.5]; form of head and pronotum characteristic [fig.6]. Habitus [fig.7].

Meldungen in Google Earth anzeigen   ...fairmairei Grouvelle, 1882

PARASILVANUS FAIRMAIREI
fig.4
PARASILVANUS FAIRMAIREI
fig.5
PARASILVANUS FAIRMAIREI
fig.6
PARASILVANUS FAIRMAIREI
fig.7
 
-- Head not appearing finely granulate, puncturation of frontal triangle not obviously different from that of rest of head; with a fovea at clypeogenal emargination; antennae as in [fig.8]; pronotum moderately to extremely elongate.

   ...3

PARASILVANUS OCELLATUS
fig.8
 
#3 Extremely elongate species; form of head and pronotum diagnostic, pronotum behind anterior angles, broadest at basal third [fig.9]. Length 3.42-4.81 mm.

   ...pulcher (Grouvelle, 1905)

PARASILVANUS PULCHER
fig.9
 
-- Moderately elongate species; pronotum and head not as above, pronotum behind anterior angles, broadest at middle.

   ...4

 
#4 Vertex of head with deep, obvious coarse punctures and fine setiferous punctures with slightly raised margins (slightly ocellate) [fig.10]; head slightly longer than broad (10.4-11/10); pronotum elongate (18-19/10), disc without obvious foveae (slight depressions are present) [fig.11].

   ...tenuis (Grouvelle, 1889)

PARASILVANUS TENUIS
fig.10
PARASILVANUS TENUIS
fig.11
-- Vertex of head with ocellate setiferous punctures dominant, coarse punctures present but less obvious; pronotal length/breadth 15-19/10, disc with shallow to deep lateral foveae, if with shallow foveae then head broader than long (11-12/10).

   ...5

 
#5 (4) Pronotum more elongate (16-19/10) with deep lateral foveae on disc; head often appearing elongate, although broader than long (10.1-10.4/10), [fig.12]; metasternal disc with well-defined lateral depressions and comparatively impunctate regions of caudal half obvious (only fine setiferous punctures present), interspaces dull to moderately shining; in ♂, metatibia with a lamellate tooth towards apex [fig.13] and elytra with sutural stria depressed near apical fourth [fig.12].

   ...ocellatus (Grouvelle, 1889)

PARASILVANUS OCELLATUS
fig.12
PARASILVANUS OCELLATUS
fig.13
-- Pronotum less elongate (15-16/10) with shallow ill-defined lateral depressions on disc; head more obviously broader than long (11-12/10), [fig.14]; metasternal disc without distinct lateral depressions hence impunctate regions (as above) ill-defined, interspaces shining; in ♂, sutural stria of elytra and metatibia simple.

   ...oblitus (Grouvelle, 1909)

PARASILVANUS OBLITUS
fig.14
 
  fairmairei
mimosae
oblitus
ocellatus
pulcher
tenuis
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First prepared: 02.06.2019
Latest edit: 30.11.2019 - 01:49:55
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