Acmaeodera (Acmaeodera) chikatunovi, Volkovitsh, 2020
publication ID |
https://doi.org/10.5281/zenodo.4268008 |
publication LSID |
lsid:zoobank.org:pub:CC2E5B33-2EDB-48CB-9B70-928BF1D43EB9 |
persistent identifier |
https://treatment.plazi.org/id/03C387E8-FF92-650C-FEB5-7EB12DDA1A16 |
treatment provided by |
Felipe |
scientific name |
Acmaeodera (Acmaeodera) chikatunovi |
status |
sp. nov. |
Acmaeodera (Acmaeodera) chikatunovi n. sp.
( Figs 1–4, 11, 13, 14, 17, 20, 23)
LSID: urn:lsid:zoobank.org:act:511969FF-1FA3-4D0E-A8C2-58FE9309280C .
Etymology: The species name is dedicated to Prof. Vladimir I. Chikatunov, Steinhardt Musum of Natural History, Tel-Aviv University, Israel.
Diagnosis: Body ( Figs 1–3) of mediUm size, elongATe, slender, 3.45× As long As pronotum width at base, slightly convex, without dorsal curvature; black, without metallic sheen; elytra blackish brown, monochromatic; body dorsally covered with recumbent and semi-erect brown and white setae; ventrally with recumbent, fine, yellowish setae; body length 6.9 mm, width at pronotal base 2.0 mm.
Description: Female. Head ( Figs 17, 20) broad, vertex slightly convex, weakly depressed medially when seen from above; eyes slightly convex, not protruding beyond HeAd conToUr. VerTex wiTHoUT mediAl cArinA, 2.10× As wide As TrAnsverse diAmeTer of eye And 1.17× As wide As frons Above AnTennAl sockeTs. Frons weAkly convex, with well-marked foveolate depression in upper part; with slightly curved, weakly diverging sides; covered with ocellate to reticulate sculpture of dense, medium-sized umbilicate punctures without distinct central grains and micropunctures, intervals shiny, less than ½ diameter of puncture; vertex and upper part of frons covered with rather long, semi-erect, dark brown setae, in lower part mixed with white setae. Clypeus relatively broad, depressed, with deep arcuate anterior emargination. An- TennAe of femAle long ( Fig. 11), 1.75× As long As verTicAl diAmeTer of eye; AnTennAl segments abruptly expanded from antennomere 5; scape long, nearly straight, expanded toward apex; pedicel slightly elongate, feebly swollen, barrel-like; anTennomere 3 elongATe, AboUT 1.5× As long As pedicel And sligHTly longer THAn 4; antennomere 4 weakly expanded toward apex; antennomere 5 sharply triangular, slightly longer than wide, with weakly emarginated anterior margin; antennomeres 6–10 sharply triangular with emarginate to straight anterior margin, antennomere 6 as long as wide, 7–10 slightly wider than long; antennomere 11 transverse with deeply emarginated apex bearing two denticles, as wide as long.
PronoTUm ( Figs 4, 20) weAkly convex, moderATely TrAnsverse, 1.64× As wide AT base as long, widest just behind middle; sides angularly projecting, nearly straightly diverging from base toward widest point, then longer, straightly converging toward anterior angles. АnTerior mArgin neArly sTrAigHT, bAsAl mArgin sligHTly emArginATe. Lateral carina lacking. Pronotum dorsally weakly convex, with shallow medial impression and extensive, well-marked basal depression; basal margin not elevated between prescutellar and lateral fossae; prescutellar fossa large and deep, lateral fossae well defined, surrounded by deep depressions. Sides covered with nearly alveolate to reticulate, disc with reticulate sculpture without concentric rugosity, consisting of round, superficial umbilicate punctures without marked central grains and micropunctures. Pronotal sides covered with recumbent white and dark brown setae, disc with semi-erect, curved, dark brown setae. Anterior prosternal margin ( Fig. 3) nearly straight, bordered with very fine transverse groove; prosternum and prosternal process weakly convex, covered with ocellate to reticulate sculpture of very small umbilicate punctures with flat bottom; pronotal hypomeron bearing reticulate sculpture of much larger superficial punctures; meso- and metaventrites and metacoxal plates with ocellate to reticulate sculpture of the same punctures.
ElyTrA ( Figs 1, 2) elongATe, slender, 2.54× As long As wide AT bAse, weAkly convex; right elytron strongly deformed; sides subparallel toward posterior third, then evenly, arcuately converging to rounded apices. Subhumeral excision absent, subhumeral portion of epipleura nearly straight; epipleural serrations distinct, visible up to nearly the level of hind coxa, apical denticles small, saw-like. Strial punctures shallow, round or elongate, separate at anterior half, partly merging at posterior HAlf of elyTrA; sTriAe visible Up To bAse. InTervAls flAT, sUbeqUAl, 1.2–2.5× As wide as striae; 9 th interval flat, not serrated; intervals bearing very fine, inconspicuous micropunctures on slightly rugulose background; covered with rather long (nearly as long as interval width), semi-erect, mainly brown setae mixed with white setae on sides. Elytral surface dull. Elytra black-brown, monochromatic.
Legs ( Figs 1, 3, 4, 13, 14) blackish brown; metacoxal plates with posterior margin nearly straight, slightly emarginate laterally, lateral teeth completely lacking. Tibiae slender, not expanded toward apices, covered with white and brown setae; metatibiae bearing comb of rather long dark brown setae externally. Tarsomeres 1–4 subequal, short, not expanded toward apices; tarsomere 5 slender, long, poorly expanded toward apex; tarsal adhesive pads nearly lacking on all tarsomeres, hardly visible on tarsomere 4 (it is possible that the pads of this specimen are underdeveloped). Tarsal claws of female long, with poorly marked denticle above mid-length.
Abdomen ( Fig. 3) blackish brown, nearly black; laterally covered with reticulate sculpture of very dense, round, umbilicate punctures without marked grains, on disc changing to ocellate sculpture of smaller umbilicate punctures; surface covered with relatively long, recumbent, white and light brown setae. Anal ventrite of female regularly rounded apically, entirely bordered with fine sulcus.
Ovipositor ( Fig. 23) is of transitional type from uritiform to tubular, nearly as long As wide, wiTH ArcUATe Apex, disTAnce beTween sTyli AboUT 3× As long As of eAcH stylus, which is short, swollen and slightly curved. Dorsal hemisternites stronger sclerotized along entire length, relatively narrow, subparallel, slightly curved, far not reaching anterior margin, with poorly marked additional sclerotization toward apex. Ventral hemisternites narrow, poorly sclerotized, hardly visible at anterior half, weakly curved, expanded toward anterior margin. Lateral margins strongly angularly expanded in anterior half, their anterior margin and apex of ovipositor covered with rather short setae.
Male. Unknown.
Variability: Unknown. Although a single female specimen reared from its host plant is partly deformed, particularly right elytron, the set of characters including rather peculiar ovipositor, enable us to describe it as a new species. However, other specimens, if they will be ever found, can differ in some characters, particularly in elytral coloration and tarsal pads development.
Differential diagnosis: Because the male of A. chikatunovi n. sp. is unknown, it is difficult to attribute it to a certain species group. The new species most likely belongs to the A. brunneipennis (= A. elater Théry, 1930 ) species group ( Volkovitsh 1979) and comes close to A. strumiai Volkovitsh, 2019 ( ? brunneipennis species group) ( Figs 8–10, 19, 21, 24) and A. guichardi Levey & Volkovitsh, 1996 (cylindrica species group) ( Figs 5–7, 12, 15, 16, 18, 22, 25); both species occur in Oman ( Bílý et al. 2011; Volkovitsh 2019 a). Based on the ovipositor structure similar to these of A. strumiai , A. brunneipennis Kerremans, 1906 ( Volkovitsh 1979: 350, fig. 74) and A. damasensis Pic, 1936 , the new species can be attributed to the brunneipennis species group. Main diagnostic characters of A. chikatunovi n. sp. compared with these of A. strumiai and A. guichardi are presented in Table 1.
A. chikatunovi n. sp. differs from A. strumiai and A. guichardi in the first place by the peculiar ovipositor, which is intermediate between the uritiform ( A. guichardi ) and tubular ( A. strumiai ) types ( Figs 23–25). It differs from the both species by sharply triangular distal antennomeres of female ( Figs 11, 12), by the absence of the lateral tooth on the metacoxal plates ( Figs 4, 7, 10), by almost lacking adhesive pads and a very small internal denticle on the tarsal claws ( Figs 13–16). It also differs from the both species by lacking of elytral markings, but unicolor specimens rarely occur among normally colored A. guichardi . Additionally, it differs from A. strumiai by its elongate, slender body ( Figs 1, 8) and not elevated pronotal base ( Figs 20, 21); from A. guichardi , by mainly brown dorsal pubescence (white in A. guichardi ) and abdominal sculpture consisting completely of round punctures (in A. guichardi at least the abdominal disc is covered with horse-shoe punctures).
Holotype: ♀ Oman: (Dhofar gov.) / Rawiyya 640 m / 17.354°N 54.061°E / 16.I.2018 D. Baiocchi [& Gianluca Magnani] leg. (p, PC) [label data indicate the locality where wood samples were taken] // ex larva / Boswellia sacra / 2018 (p, PC) // Daniele Baiocchi / collection Roma (p, PC) ( GMCC). Additional label: Holotype / Acmaeodera (Acmaeodera) / chikatunovi sp. n. / Volkovitsh des. 2020 (red, p, PC).
Distribution: Arabian Peninsula: Oman (Dhofar Governorate).
Ecological information: A single specimen was reared from the wood of Boswellia sacra Flueck. ( Burseraceae ).
PC |
Museum National d'Histoire Naturelle, Paris (MNHN) - Non-vascular Plants and Fungi |
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