Mecinus labilis (Herbst, 1795)
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https://dx.doi.org/10.3897/zookeys.939.50612 |
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lsid:zoobank.org:pub:B2397011-4888-4712-880E-1069C943AD33 |
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https://treatment.plazi.org/id/E1A563BB-4413-5670-8E88-41534B9FDC52 |
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Mecinus labilis (Herbst, 1795) |
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Mecinus labilis (Herbst, 1795)
Material examined.
3 L3 larvae and 9 pupae, Serbia, Staničenje, 6.07.2017, 43°12.915'N 22°30.495'E, 364 m., ex Plantago lanceolata , lgt. I. Toševski. Accession numbers of sequenced specimen MN992008.
Description of mature larva
(Figures 4A-D View Figure 4 , 5A-F View Figure 5 ). Measurements (in mm). Body length: 1.40-2.00. Body width (metathorax): 0.84-1.00. Head width: 0.36-0.40.
Body (Figure 4A-D View Figure 4 ) white, moderately slender, slightly curved. Chaetotaxy of thoracic segments relatively well developed, setae capilliform, different in length, light yellow, on abdominal segments I-VII very short, on segments VIII and IX of medium length. Prothorax (Figure 4B View Figure 4 ) with eleven long prns of almost equal length, two long ps and one long eus. Meso- and metathorax (Figure 4B View Figure 4 ) with one short prs, three pds (pds1 short, pds2-3 long), one long as, three ss different in length (one minute and two medium), one long eps, one long ps and one long eus. Pedal area with four pda (two long and two medium). Abdominal segments I-VIII (Figure 4C, D View Figure 4 ) with one short prs, four short pds arranged along posterior margin, two minute ss, two short eps, one short ps, one short lsts and two short eus. Abdominal segment IX (Figure 4D View Figure 4 ) with three medium ds, all located close to posterior margin, one medium ps and two rather short sts. Each of anal lobes with one minute seta.
Head capsule (Figures 4A View Figure 4 , 5A-F View Figure 5 ) white, almost rounded. Des1-3,5 long, des4 very short. Fs1 slightly shorter than des1, fs4 and fs5 equal in length, almost as long as des1. Les1 and les2 long; one ves very short (Figure 5A View Figure 5 ). Antennae (Figure 5B View Figure 5 ) with elongated sensorium (Se), four times as long as wide, and two sensilla basiconica and one sensillum ampullaceum. Clypeus (Figure 5C View Figure 5 ) trapezium-shaped, anterior margin almost straight; cls2 short, clss placed close to cls2. Labrum (Figure 5C View Figure 5 ) narrow, trapezium-shaped, anterior margin distinctly sinuate; lrs1 long, lrs2 and lrs3 medium. Epipharynx (Figure 5D View Figure 5 ) with three elongated, finger-like als of equal length; two relatively elongated, finger-like ams; two short finger-like mes; surface smooth; labral rods very short, rounded. Mandibles (Figure 5E View Figure 5 ) conical, rather wide, with divided apex; both mds capilliform, short, equal in length, placed transversely. Maxilla (Figure 5F View Figure 5 ) with one medium stps and two medium pfs; mbs short; mala with six long rod-like dms of almost equal size, five vms different in length. Maxillary palpi: basal palpomere distinctly wider than distal. Prelabium (Figure 5F View Figure 5 ) cup-like with one short prms; ligula with one minute lig; premental sclerite weakly developed, cup-like. Postlabium (Figure 5F View Figure 5 ) with very short pms1, long pms2, and very short pms3.
Description of pupa
(Figure 6A-C View Figure 6 ). Measurements (in mm). Head width: 0.36-0.40. Body width: 1.00-1.40. Body length: 1.40-2.20.
Body rather stout, slightly curved, white. Rostrum slender, moderately short, about 2.0 times as long as wide, reaching procoxae. Antennae short. Pronotum 2.2 times as wide as long. Urogomorpi (ur) very short, conical, only slightly reaching outline of the body (Figure 6A-C View Figure 6 ).
Chaetotaxy almost invisible, all setae minute, possible to observation only under higher magnification. Head with one os. Rostrum with two rs placed medially (Figure 6A View Figure 6 ). Pronotum with two as, two ls, one ds and three pls. Dorsal parts of meso- and metathorax with two setae placed laterally. Abdominal segments I-VIII with three setae situated posterolaterally, two setae laterally and three setae ventrally. Abdominal segment IX with two micro-setae ventrally.
Biological notes.
Larvae feed on Plantago lanceolata L. in galled pyxidia, where they pupate in the collar without causing externally visible modifications ( Hoffmann 1958).
Remarks and comparative notes.
This species is widely distributed in Europe, the Caucasian states, and Turkey. Concerning the adults, the pattern of the elytral integument (reddish with two black oblique bands from interstria 1 to 7) and the shape of the rostrum (in lateral view moderately curved in basal half then straight to apex) allow us to separate these two species from all the others. With regard to the immatures, the differences from the other studied species of the group, M. pascuorum , are several and are reported in the key. Molecular data also do not show a close relationship between these two species (I. Toševski, unpublished data).
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.
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