Griveaudus, Stroiński, Adam & Świerczewski, Dariusz, 2014
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publication ID |
https://doi.org/ 10.11646/zootaxa.3861.1.3 |
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publication LSID |
lsid:zoobank.org:pub:92A437D0-A49A-48E6-A02F-C88F8599665C |
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DOI |
https://doi.org/10.5281/zenodo.6144848 |
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persistent identifier |
https://treatment.plazi.org/id/6849879D-4B14-FFCC-FF69-FC30188D442C |
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treatment provided by |
Plazi |
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scientific name |
Griveaudus |
| status |
gen. nov. |
Griveaudus View in CoL gen. nov.
( Figs 1–70 View FIGURES 1 – 4 View FIGURES 5 – 10 View FIGURES 11 – 16 View FIGURES 17 – 22 View FIGURES 23 – 28 View FIGURES 29 – 35 View FIGURES 36 – 43 View FIGURES 44 – 49 View FIGURES 50 – 55 View FIGURES 56 – 64 View FIGURES 65 – 70 )
Type species: Griveaudus issidiformis sp. nov., here designated.
Etymology. The generic name is after Paul Griveaud (1907–1980), a well-known French collector of Madagascan insects. Gender: masculine (Genetivus singularis: Griveaudus , 4th declension).
Diagnosis. The newly described genus Griveaudus differs from other Madagascar Selizini genera by the combination of the following characters: frons with short median, single carina, mesonotum smooth (frons with Yshaped carina, mesonotum with gibbosities— Urana Melichar, 1902 ), vertex extremely incised medially (vertex slightly incised medially— Peyrierasus Stroiński et Świerczewski, 2013 ).
Description. Body robust. Head truncate, with compound eyes in dorsal view about as wide as thorax ( Figs 2–3 View FIGURES 1 – 4 , 5 View FIGURES 5 – 10 ).
HEAD. Vertex in form of hourglass, extremely narrow medially; posterior margin elevated, anterior margin obliterated laterally, lateral margins subparallel ( Figs 7–8 View FIGURES 5 – 10 ), surface with sensory and secretory structures ( Fig. 17 View FIGURES 17 – 22 ). Frons ( Figs 11–13 View FIGURES 11 – 16 ) as long as wide, the widest at the level of compound eyes; frons with short and wide protrusion in the upper part of head; disc of frons with short median carina; lateral margins of frons carinate and elevated; disc of frons irregularly rugose, with sensory and secretory organs ( Fig. 14 View FIGURES 11 – 16 ). Compound eyes oval, with small callus placed at lower-posterior margin. Ocelli absent ( Figs 6–7 View FIGURES 5 – 10 ). Antennal pedicel short, widened apically, with setae and plate organs mainly restricted to a hollow area at the top and partly on upper surface ( Figs 18–20 View FIGURES 17 – 22 ). Sensilla placodea of the clover-leaf like type ( Figs 21–22 View FIGURES 17 – 22 ). Clypeus narrower than frons, without carinae ( Fig. 11 View FIGURES 11 – 16 ). Rostrum with apical segment a little shorter than subapical, apex reaching hind coxae.
THORAX. Pronotum distinctly longer than vertex at midline, with short, median carina placed posteriorly ( Figs 3 View FIGURES 1 – 4 , 7, 10 View FIGURES 5 – 10 ) or in some specimens median carina absent ( Fig. 9 View FIGURES 5 – 10 ); disc of pronotum medially depressed, postocular eminences absent. Mesonotum deltoid ( Figs 3 View FIGURES 1 – 4 , 9–10 View FIGURES 5 – 10 ); disc anteriorly with median groove and short obsolete carina; lateral carinae internally arcuate and elevated, reaching posterior margin; lateral parts of mesonotum without gibbosities.
Tegmen ( Figs 1, 4 View FIGURES 1 – 4 , 6 View FIGURES 5 – 10 , 23–28 View FIGURES 23 – 28 ) coriaceous and convex, with well visible venation and bulla, with apical line only; transverse veinlets forming irregular net on whole tegmen. Costal and posterior margins arcuate, costal and sutural angles bluntly rounded; postclaval sutural margin absent. Costal area narrower than costal cell, with transverse veinlets, terminating at the level of end of clavus. Costal cell with several transverse veinlets. Basal cell long and narrow. Sc+R forked before bulla and distinctly basad of M forking; ScRA elevated, RP obsolete basally, M fork before half of tegmen; M1+2 and M3+4 forks at the same level in apical part of tegmen; CuA bifurcated near the midlength of tegmen. Claval veins Pcu and A1 fused before end of clavus, vein A1 strongly elevated; transverse veinlets between Pcu and CuP. Terminal forks in subapical part of tegmen. Terminals: CuA—2, M1+2—2, M3+4—2, RP—2, ScRA—2. Sensory and secretory structures present on the whole surface of tegmen. Tubercles with concentration on costal area, alongside apical margin, between basal RP and M veins and in basal part of clavus.
Femora shorter than tibiae; hind tibia arcuate and partly flattened laterally with 2 lateral spines placed after midlength, apically with row of well-developed 7 teeth ( Fig. 15 View FIGURES 11 – 16 ); basitarsomere as long as cumulative length of 2nd and 3rd tarsomeres with row of apical spines in formula 2 (longer) + 6–7 (shorter), second tarsomere with 2 lateral spines ( Fig. 16 View FIGURES 11 – 16 ).
MALE. Anal tube (in lateral view, Figs 29–30 View FIGURES 29 – 35 , 37 View FIGURES 36 – 43 ) elongate, distinctly tapering apicad; anus placed about midlength. Anal tube (in dorsal view, Fig. 31 View FIGURES 29 – 35 , 39 View FIGURES 36 – 43 ) elongate, basal part distinctly narrower than median part; apical margin with shallow incision; anus placed about midlength.
Pygofer (in lateral view) distinctly higher than wide, narrowing dorsally ( Figs 29–30 View FIGURES 29 – 35 , 36 View FIGURES 36 – 43 ); dorso-posterior angle almost right; anterior margin sinuate, posterior margin weakly arcuate.
Genital styles (in ventral view, Fig. 32 View FIGURES 29 – 35 ; in lateral view, Fig. 38 View FIGURES 36 – 43 ) longer than wide and bearing distinct, long and sharp capitulum; upper margin near base of capitulum strongly convex; ventro-posterior angle widely rounded.
Phallic complex. Periandrium closed basally, open dorsally with long lateral split ( Figs 40–43 View FIGURES 36 – 43 , 65–68 View FIGURES 65 – 70 ). Ventral part apically tripartite with median sharp process and lateral folds; vertical keel and ventrally pointed tooth present; apical lateral folds with several teeth. Dorsal part trilobate; median part very short with vertical, bifurcate process oriented dorso-basad; lateral lobes as long as ventral part, with two groups of lateral teeth, median and apical processes; median process huge and multiforked apically, oriented basad; apical process long and narrow, well sclerotised basally with short tooth and bifurcate apically, with or without median short process. Aedeagus divided into dorsal and ventral parts ( Figs 69–70 View FIGURES 65 – 70 ), lateral split extending midlenght. Dorsal part about as long as ventral part, medially with lateral lobe, apically distinctly bilobate.
FEMALE. Pregenital sternite massive, lateral lobes weakly separated ( Figs 44–47 View FIGURES 44 – 49 , 56 View FIGURES 56 – 64 ); anterior margin weakly concave, medially with sclerotized lobe; posterior margin medially with two bluntly triangular lobes separated by shallow concavity, sometimes shifted. Abdominal sternites with scattered sensory pits ( Figs 48–49 View FIGURES 44 – 49 ).
Anal tube (in lateral view, Figs 50–51 View FIGURES 50 – 55 ) flattened, elongate and narrow, reaching end of gonoplac; anus placed about midlength; ventral surface with long setae. Anal tube (in dorsal view, Fig. 57 View FIGURES 56 – 64 ) oval or ovoid; anus placed about midlength.
Gonoplac unilobate, laterally flattened, elongate ( Figs 58–59 View FIGURES 56 – 64 ); posterior margin rounded with single row of 5- 6 well-developed teeth ( Figs 52–53 View FIGURES 50 – 55 , 60 View FIGURES 56 – 64 ); narrow, membranous part placed alongside ventral margin, extending half of gonoplac.
Gonapophysis VIII sabre-shaped and laterally flattened, tapering apicad ( Figs 61–62 View FIGURES 56 – 64 ); apical part of ventral margin folded externally, apical part of dorsal margin with 4 teeth. Endogonocoxal process shorter than gonapophysis VIII, sabre-shaped with spiniferous microsculpture ( Figs 54–55 View FIGURES 50 – 55 ).
Gonaphophyses IX and gonospiculum bridge as in Figs 63–64 View FIGURES 56 – 64 .
Bursa copulatrix of single, elongately oval, huge pouch and narrow basis ( Fig. 33 View FIGURES 29 – 35 ); cells well visible, without ornamentation ( Fig. 34 View FIGURES 29 – 35 ). Spermatheca well developed; ductus receptaculi ribbed and widened apically, diverticulum ductus smooth and narrow with bulba ( Fig. 35 View FIGURES 29 – 35 ).
Distribution. Madagascar.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.