Anchonidium Bedel, 1884
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publication ID |
https://doi.org/ 10.35929/RSZ.0004 |
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DOI |
https://doi.org/10.5281/zenodo.5752368 |
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persistent identifier |
https://treatment.plazi.org/id/03FC8F2C-9957-8A65-FEF2-8150FDBBCE7B |
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treatment provided by |
Carolina |
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scientific name |
Anchonidium Bedel, 1884 |
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Genus Anchonidium Bedel, 1884 View in CoL
Rostrum with long and straight scrobes, these flattened and conjoint at underside towards base ( Figs 1 View Fig A-B). 2/3 of underside of rostrum from tip on bearded ( Figs 1B, D, G View Fig ), rather densely covered by longer yellowish bowed bristles, dorsum of rostrum flattened, tricarinate ( Fig. 1A View Fig ), angulate towards apex and base ( Fig. 1D View Fig ). First club segment several times longer than following ones, cup-shaped; antennal funiculus with 7 antennomeres, longest first segment, second one half of the length and following ones transverse, steady broadened towards club ( Fig. 1I View Fig ). Pronotum roundish, characteristically sculptured with a V-shaped impression on upper side, and a longitudinal carina at disc, strongly constricted before fore margin, strongly punctuate ( Fig. 1F View Fig ); Procoxae almost touching each other, separated by thin interspace ( Fig. 1C View Fig ); Mesocoxae separated by half their diameter; hind margin of metasternum with sharp pointed edges sidewards ( Fig. 1E View Fig ). Metacoxae separated by 1.5 their diameter; in middle of metacoxae on first ventrite coarsely punctuate with especially large, roundish-oval punctures or confluent huge punctures in the shape of an oval groove ( Fig. 1J View Fig ); elytra with striae coarsely punctuate, intervals reduced to narrow elevated ridges between stria, uneven intervals higher elevated ( Fig. 2 View Fig D-F); vestiture of body and legs dominated by yellowish bowed bristles, these denser standing along sides and underside of rostrum, on pronotum, on femora and tibiae, and along uneven ridges on elytra; Femora unarmed; Tibiae all uncinate at outer angle ( Fig. 1H View Fig ), third tarsal segment bilobed, claws simple, free; genital organs: penis tube shaped in cross-section and bowed in lateral view ( Figs 3 View Fig I-L), bursal atrium strongly sclerotized ( Fig. 4J, K View Fig ).
Remark: One of the most apparent differences between the three species of Anchonidium View in CoL in the narrow sense and the others, is the very deviating shape of the penis of A. caucasicum , which is flat in cross-section (and not tube shaped as in Anchonidium View in CoL sensu stricto) with its tip cut in middle ( Fig. 3 View Fig O-P).
Diagnostic key to species of the genus Anchonidium View in CoL
1A Body without yellowish bowed bristles only sparse setae on elytra; elytra oval, laterally evenly rounded; pronotum without sculpturation, evenly rounded at disc; penis flat in cross section, characteristically cut in middle at apex ( Fig. 3 View Fig O-P), species from Caucasian region...................................................................... Anchonidium View in CoL sensu lato
1B Body with yellowish bowed bristles, dense on rostrum, pronotum, along ridges on elytra, and on legs; elytra laterally more parallel; pronotum strongly sculptured ( Fig. 1F View Fig ); penis tube-shaped in cross section, apex rounded, blunt or sinuate ( Figs 3 View Fig A-L), species from western Europe and northern Africa ..... Anchonidium View in CoL sensu stricto, 2
2A Ventral side of pronotum at fore margin with a faint and shallow rostral notch or channel ( Fig. 1C View Fig ). First ventrite with oval groove between metacoxae ( Fig. 1J View Fig ); elytra laterally rounded, shorter, 1.4-1.5 times as long as wide; 10 to 12 punctures on elytral disc from base to declivity; widest in first third ( Fig. 2 View Fig D-F); penis thin (lateral view), slender with almost rectangular apex and rounded sides (dorsal/ventral view; Fig. 3 View Fig I-L). Great Britain (Cornwall), W- and NW-France, N-, NW- and S-Spain, N-Portugal, N-Morocco ............................................... A. unguiculare View in CoL
2B Ventral side of pronotum at fore margin only sinuate, no rostral notch or channel detectable ( Fig. 2B View Fig ). First ventrite without groove ( Fig. 2B View Fig ), but very coarse and/or oval punctures between metacoxae; elytra parallel sided, longer, 1.5-1.8 times as long as wide; 14 to 16 punctures on elytral disc from base to declivity, widest in or behind middle ( Fig. 2A, C View Fig ); penis short, blunt and thick in lateral view ( Figs 3 View Fig A-H)..................................................................... 3
3A Elytra widest along middle ( Fig. 2A View Fig ), 1.6-1.8 times as long as wide; tip of penis broad, margin rounded ( Fig. 3 View Fig E- H). Portugal (Serra de Monchique) .......................................................................................... A. braunerti sp. nov.
3B Elytra widest behind middle ( Fig. 2C View Fig ), 1.5-1.6 times as long as wide; tip of penis very broad, spatula-shaped with sinuate fore margin ( Fig. 3 View Fig A-D). Portugal (Serra da Estrela, Serra do Marão)................... A. spathiferum sp. nov.
Remarks: As both new species of the genus Anchonidium are – based on their external morphology – very similar to each other and share in general most characters with A. unguiculare , except for those ones mentioned in the key below, the descriptions of the new species are provided in a condensed form.
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