[Berberomeloe majalis] Tête de fourmi et abdomen énorme !

[albertcactus]

Bonjour tout le monde !
En me balladant je suis tombé sur une bestiole sans aile, toute noire avec une tête de fourmi et un abdomen gigantesque (5cm)! Dans quelle direction dois-je chercher le nom de cet insecte ?
Merci.
Benoît

[Bébert]

malgré la description laconique et la taille surestimé, je pense que tu peut aller faire un tour chez les méloés (coléoptères).

[albertcactus]

Oh merci ! Je n'aurai jamais cru que cela pouvait être un Coléoptère. Je confirme la taille et j'ai déjà vu ces insectes dans la région de Béziers. J'y retourne cet été, j'essaierai de prendre une photo.

A bienôt.



Inconnu : Espagne : Tres Cantos : 28760 : 18 5 2011

Altitude : 680m - Taille : 50mm

Réf. : 70423

[Bozo]

albertcactus , tu indiques comme genre Berberomeloe dans ta fiche ... en est-on sûr ?

[albertcactus]

Tu penses qu'il peut s'agir de la même espèce que le Meloe sp. (réf 8979 de la galerie) ? Les Berbero ont l'air d'avoir un abdomen plus long, moins trapu que les Meloe... Moi je ne suis sûr de rien, n'étant pas de la partie. Je peu retourner faire d'autres photos et en mesurer plusieurs si cela peu aider ? Et alors si j'ai bien compris, ils se nourissent de pollen ?
@+

[Bébert]

ouahou effectivement là je n'ai jamais vu de meloe aussi long !!

[Bozo]

Ma question était totalement ingénue, n'y connaissant rien en Meloe ; je voulais simplement savoir si le genre est considéré comme acquis ou pas

[Saturnin de la Poire]

Tu penses qu'il peut s'agir de la même espèce que le Meloe sp. (réf 8979 de la galerie) ? Les Berbero ont l'air d'avoir un abdomen plus long, moins trapu que les Meloe... Moi je ne suis sûr de rien, n'étant pas de la partie. Je peu retourner faire d'autres photos et en mesurer plusieurs si cela peu aider ? Et alors si j'ai bien compris, ils se nourissent de pollen ?
@+

ils se nourrissent de parties végétatives de la plante
et l'abdomen est variable en longueur et forme
sur ton dernier cliché, je ne saurais nommer la bête

[cerocomactif]

C'est sans aucun doute Berberomeloe majalis. La taille est tout à fait plausible.

[Lucas Benaiche]

Il y a visiblement eu de gros changements récemment par les entomo espagnols (analyses phylogénétiques) sur ce genre, qui passe de deux à dix espèces (huit en péninsule ibérique et deux au Maghreb)

Les identifications sur photos vont être plus compliquées, je n'ai pas encore lu toute la publication (en anglais). Quelqu'un a-t-il des infos par rapport à la seule espèce française dans les PO ?

La clef des espèces telle qu'elle est présentée dans la publication :

Berberomeloe laevigatus is excluded from the key. We have not been able to study its type material and
an exhaustive morphological study, with larger sample size, is necessary to identify unequivocally the
morphological diagnostic traits of this species (see B. laevigatus account above).

1. Last antennomere (XI) markedly narrowed from the middle towards the apex (more obvious in males) with
converging sides (Figs 23G, 25B, G), about half as wide as antennomere X at the apex; VII and IX strongly
toothed (Figs 23, 25G). Abdomen always entirely black. Male genitalia with median lobe clearly narrowed
in its distal region (Figs 23D, F, 25F, H). Exclusively south-eastern Iberian Peninsula ................................2
- Last antennomere (XI) not or barely narrowed towards the apex (narrower in males), with subparallel
sides; VII and IX weakly or moderately toothed (Fig. 6B, H). Abdomen usually with red or orange transverse
stripes (except specimens of some localized populations, which present the abdomen entirely black). Male
genitalia with median lobe obliquely truncated and wide (Fig. 8G) or rounded and narrowed (Fig. 21G) at
the apex (depending on the species). All Iberian Peninsula and north-western Africa ...................................3
2. Head always with red temples; an additional red spot on the frons is present in some populations (Figs 23E,
24A, B). Pronotum longer, with well-marked, sharp fore angles (Fig. 23H).................................... B. insignis
- Black head, always without any trace of red blotches (Figs 25A, 26E, F). Pronotum shorter, strongly
transverse, with rounded fore angles (Fig. 25I) ............................................................................. B. tenebrosus
3. North African species .........................................................................................................................................4
- Iberian species .....................................................................................................................................................5
4. Puncturation of head and pronotum dense, with thick and deep punctures that form a confluent or
subconfluent pattern of rugose appearance (Fig. 21H). Male genitalia with parameral lobes of tegmen long
and narrow in lateral view; distal region of median lobe relatively narrowed towards the apex (Fig. 21G).
North-western Morocco (central and western Rif and adjacent areas) .................................................B. yebli
- Puncturation of head and pronotum usually scattered, sparse, especially on pronotal disc, not rugose neither
subconfluent, formed by small and medium-sized shallow punctures, (Fig. 19G, H) (populations from Middle
Atlas have denser and deeper punctures, but always in lower density than in B. yebli). Male genitalia
with parameral lobes of tegmen shorter and wider in lateral view; distal region of median lobe obliquely
truncated, not markedly narrowed, towards the apex (Fig. 19F). Eastern and central Morocco, western and
central Algeria................................................................................................................................B. maculifrons
5. Pronotal puncturation dense, formed mostly by thick and deep punctures and by others about half thick
but also deep and more scarce, usually forming a corrugated or rugose pattern; medium longitudinal groove
of pronotum deep and clearcut (Fig. 11H).......................................................................................B. comunero
- Pronotal puncturation dense or scarce, but never rugose or corrugated; medium longitudinal groove of
pronotum shallow and inconspicuous, often absent...........................................................................................6
6. Posterior edge of abdominal tergites I–VI usually with a narrow red or orange bar (ratio ‘total width
of the second tergite/width of the transverse bar of the second tergite’ in B. castuo between 1.68 and
2.5, average = 2.1, SD = 0.23; in B. payoyo between 1.85 and 2.45, average = 2.11, SD = 0.17), except
specimens at some localized populations from southern Portugal and Cadiz Province (Spain), that are
entirely black (Figs 9A, 17A). Sides of the pronotum subparallel and fore angles barely expanded, widely
rounded (Figs 9H, 17H). Tegmen (male genitalia) with parameral lobes wide, broadly rounded at apex
(Fig. 9G). Western Iberian Peninsula, Cadiz Province and western Betic Mountains (Sierra de Grazalema,
Serranía de Ronda, Sierra de Las Nieves, and Sierra Tejeda) .........................................................................7
- Posterior edge of abdominal tergites usually with a wide red bar (ratio ‘total width of the second tergite/width
of the transverse bar of the second tergite’ in B. majalis between 1.04 and 2.03, average = 1.6, SD = 0.27;
in B. indalo between 1.09 and 1.35, average = 1.18, SD = 0.07), except in some localized populations of
B. majalis from the province of Ciudad Real, where individuals have the abdominal tergites entirely black)
(Fig. 6A). Sides of the pronotum convergent towards back and fore angles marked and sharp (B. indalo,
Fig. 13H) or sides of the pronotum subparallel and fore angles closely rounded (B. majalis, Fig. 6I). Tegmen
(male genitalia) with parameral lobes relatively narrow (Fig. 6E). Eastern and central Iberian Peninsula .8
7. Pronotum surface rather convex (in lateral view), with abundant and deep punctures; disc clearly punctured
(Fig. 9H). Western Iberian Peninsula (north of Guadalquivir river basin) ........................................ B. castuo
- Pronotum surface almost flat (in lateral view), finely and sparsely punctate; disc almost smooth (Fig. 17H).
Cádiz province and western Betic Mountain Range (south of Guadalquivir river basin) ................. B. payoyo
8. Male antennomeres IV and V subparallel, poorly dentate, swelled and with a singular yellowish depressed
sensitive area at their inner border; antennomeres VI–IX relatively similar in shape and feebly serrated
(Fig. 13B). Fore angles of pronotum prominent, obtusely pointed (Fig. 13H); pronotal puncturation partly
dense, heterogeneously arranged (denser towards the sides, disc almost smooth). Red bars of the abdominal
tergites usually wide (ratio ‘total width of the second tergite/width of the transverse bar of the second
tergite’ between 1.09 and 1.35, average = 1.18, SD = 0.07). Median lobe of male genitalia robust, broad at
apex (Fig. 13F). Eastern of Almería province ......................................................................................B. indalo
- Male antennomere IV subparallel and V dentate, not specially swollen and lacking a depressed sensitive
area at their inner border; antennomeres VI–IX more serrated (Fig. 6B). Fore angles of pronotum obtuse,
closely rounded (Fig. 6I); pronotum surface formed by relatively dense but isolated punctures, homogeneously
arranged (disc always punctate). Red bars of the abdominal tergites with a ratio ‘total width of the second
tergite/width of the transverse bar of the second tergite’ between 1.04 and 2.03, average = 1.6, SD = 0.27.
Median lobe of male genitalia slender, not especially widened to the apex (Fig. 6F, G). Central and eastern
Iberian Peninsula.................................................................................................................................. B. majalis

La publication complète est disponible ici : https://www.researchgate.net/publicatio ... _structure