Sibinia attalica Gyllenhal, 1835

Skuhrovec, Jiří, Gosik, Rafał, Caldara, Roberto & Košťál, Michael, 2015, Immatures of Palaearctic species of the weevil genus Sibinia (Coleoptera, Curculionidae): new descriptions and new bionomic data with suggestions on their potential value in a phylogenetic reconstruction of the genus, Zootaxa 2, pp. 151-187 : 155-159

publication ID

https://doi.org/ 10.11646/zootaxa.3955.2.1

publication LSID

lsid:zoobank.org:pub:2C428174-7C02-4F0C-BB34-E1BC81F58CB1

DOI

https://doi.org/10.5281/zenodo.5612734

persistent identifier

https://treatment.plazi.org/id/03B16511-FFA0-2910-FF6A-FCAFFDAFFBF9

treatment provided by

Plazi

scientific name

Sibinia attalica Gyllenhal, 1835
status

 

Sibinia attalica Gyllenhal, 1835 View in CoL

Caldara, 1985: 58.

Material examined. 11 larvae from seeds of Silene gallica L. collected 27.v.1979 at Santa Lucia di Siniscola (Nuoro province, Sardinia), leg. R. Caldara, and 31 (13 ♂♂, 18 ♀♀) pupae obtained from larvae collected similarly to the others, all determined by association with reared adults.

Differential diagnosis. See Key to the immatures of the Palaearctic species of the genus Sibinia and Table. 3 View TABLE 3 . Description of mature larva. COLORATION. Head brown. All thoracic and abdominal segments white to whitish

yellow.

HEAD CAPSULE AND MOUTH PARTS. Head width: 0.75–0.88 mm (see Table. 1). Endocarinal line present, distinctly reaching middle of frons. Des1 very short, located almost in central parts of epicarnium; des2 absent; des3 long, located along frontal suture; des4 absent; des5 long, located anterolaterally ( Fig. 1 View FIGURES 1 – 6 ). Fs1 and fs2 absent; fs3 minute, located medially; fs4 long, located anteromedially (along epistoma); fs5 long, located anterolaterally (along epistoma) ( Fig. 1 View FIGURES 1 – 6 ). Les almost as long as des3; both ves short. Postepicranial area without pes and with 5 sensilla. Antennal segment membranous, bearing conical sensorium and 2 very short, conical, sensilla ( Fig. 4 View FIGURES 1 – 6 ).

Clypeus ( Fig. 5 View FIGURES 1 – 6 ) 2.5 times as wide as long; without setae, and 1 sensillum, all located posterolaterally; anterior margin slightly rounded inside. Labrum ( Fig. 5 View FIGURES 1 – 6 ) approximately 2 times as wide as long; lms1 distinctly shorter than lms2, and as long as lms3; anterior margin slightly sinuate. Epipharynx ( Fig. 6 View FIGURES 1 – 6 ) with 2 finger-like als, different in length; with 3 short ams, ams1 as long as ams2; with 2 relatively short and finger-like mes (see comments about ams and mes in Material and Methods); labral rods short, kidney-shaped, strongly converging posteriorly. Mandibles ( Fig. 3 View FIGURES 1 – 6 ) with 1 very short mds. Maxilla ( Fig. 2 View FIGURES 1 – 6 ): stipes with 1 long stps, and with 2 long pfs, pfs1 2 times as long as pfs2; 1 very short mbs; mala with 4 slightly curved dms, different in length; with 3 moderately short vms, almost of equal length. Maxillary palpi: length ratio of basal and distal palpomeres 1:1.5; basal palpomera with 1 short mxps; distal palpomera with group of 3–4 conical, cuticular apical processes. Prementum ( Fig. 2 View FIGURES 1 – 6 ) almost rounded, with 1 prms; margin of ligula slightly curved inside; ligula with 2 very short to short ligs; premental sclerite clearly visible. Postmentum ( Fig. 2 View FIGURES 1 – 6 ) with 2 pms, pms1 absent, long pms2, 2 times as long as pms3.

THORAX AND ABDOMEN. Body length 4.30–5.30 mm (see Table. 1), elongate ( Fig. 7 View FIGURES 7 – 10 ). Abdominal segments I– V almost equal in length, slightly larger than abdominal segment VI and VII ( Fig. 7 View FIGURES 7 – 10 ). Spiracles on abdomen in median parts of segments (abdominal seg. I–VIII).

Chaetotaxy of body rather reduced. Setae moderately long to very short and light yellow. Thorax. Prothorax ( Fig. 8 View FIGURES 7 – 10 ) with 7 prn, 6 macro- and 1 microsetae; 2 moderately long ps of same length; 1 short eus. Meso- and metathorax ( Fig. 8 View FIGURES 7 – 10 ) with 1 long prs; 2 pds, different in length; alar area with 1 moderately long as; 1 moderately long ss; 1 moderately long eps; 2 moderately short ps, similar in length; and 1 short eus. Each pedal area of thoracic segments well-separated and with 2–4 moderately long pda. Abdomen. Abdominal segments I–VII ( Figs. 9, 10 View FIGURES 7 – 10 ) with 1 long prs; 3 pds of different length, pds1 and pds3 very short, pds2 very long; 2 ss of different length, ss1 very short to minute, ss2 long; 2 eps moderately long, in equal length; 2 ps of different length, ps1 very short and ps2 long; 1 long lsts; and 2 very short eus. Abdominal segment VIII ( Fig. 10 View FIGURES 7 – 10 ) with 1 short prs; 3 pds of different length, pds1 and pds3 minute, pds2 short; 1 minute ss; 2 short eps in equal length; 2 short ps of different length; 1 short lsts; and 2 very short eus. Abdominal segment IX ( Fig. 10 View FIGURES 7 – 10 ) with 1 short ds; 2 short ps of different length; and 2 short sts in equal length. Anal lobes on abdominal segment X ( Fig. 10 View FIGURES 7 – 10 ) without setae.

Description of pupa. COLORATION. Body yellow.

MORPHOLOGY ( Figs. 11–15 View FIGURES 11 – 15 ). Body length 2.75–4.35 mm; widest part 1.55–2.20 mm (see Table. 2 View TABLE 2 ). Body rather elongated and slender. Rostrum long, approximately 6 times as long as wide, reaching mesocoxae. Pronotum 2.2 times as wide as long.

CHAETOTAXY ( Figs. 11–15 View FIGURES 11 – 15 ). Setae distinct, short, unequal in length, light brown or brown, almost as thornlike. Vs and os slightly longer than other setae of head and rostrum ( Fig. 12 View FIGURES 11 – 15 ). Ds slightly shorter than other setae on pronotum ( Fig. 14 View FIGURES 11 – 15 ). Setae on abdominal segments I–VIII placed posteromedially and posterolaterally; all abdominal setae located on thorn-like protuberances, short, curved. Pseudocerci short, conical.

Biological observations. After feeding on seeds, mature larvae left the capsule and entered the soil. Pupation was observed 10 days after the larvae entered the soil. Adults were found in the cells 10 days later.

Remarks. This is a common species with a wide circum-Mediterranean distribution. It was reported to live on several species belonging to the genus Silene ( S. arenarioides Desf. , S. conica L., S. gallica L., S. maritima With. , and S. mellifera Boiss. & Reut. : Hoffmann 1955; Scherf 1964; Caldara 1985), which produce large seeds. Before the revision of the genus by Caldara (1985), this species was confused with S. femoralis , and therefore, much of the data on the host plants are doubtful.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Curculionidae

Genus

Sibinia

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