Sibinia tibialis Gyllenhal 1835
Creators: name: Skuhrovec, Jiří
name: Gosik, Rafał
name: Caldara, Roberto
name: Košťál, Michael
Publisher: name: Zenodo
Year: 2015
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Curculionidae
Sibinia
Sibinia tibialis

description: <i>Sibinia tibialis</i> Gyllenhal, 1835 Caldara, 1985: 36. <b>Material examined</b>. 12 larvae from seeds of <i>Silene otites</i> (L.) Wib. collected 5.viii. 2014 in southern Slovakia (Borská ní&amp;zcaron;ina, Malacky env. 150 m a. s. l., N 48 ° 24.7´, E 17 °04.0´), leg. J. Skuhrovec, M. Koš&amp;tcaron;ál &amp; Z. Koš&amp;tcaron;álová, and 7 (4 &amp;male;&amp;male;, 3 &amp;female;&amp;female;) pupae obtained from larvae collected similarly to the others, all determined by association with reared adults. <b>Differential diagnosis.</b> See Key to the immatures of the Palaearctic species of the genus <i>Sibinia</i> and Table. 3. <b>Description of mature larva.</b> COLORATION. Head brown to dark yellow. All thoracic and abdominal segments light yellow. HEAD CAPSULE AND MOUTH PARTS. Head width: 0.53–0.63 mm (see Table. 1). Endocarinal line present, reaching middle of frons. <i>Des</i> <i>1</i> minute, located near frontal suture; <i>des</i> <i>2</i> minute, located almost in central parts of epicarnium; <i>des</i> <i>3</i> long, located along frontal suture; <i>des</i> <i>4</i> absent; <i>des</i> <i>5</i> long, located anterolaterally (Fig. 31). <i>Fs</i> <i>1</i> and <i>fs</i> <i>2</i> absent; <i>fs</i> <i>3</i> minute, located medially; <i>fs</i> <i>4</i> long, located anteromedially (along epistoma); <i>fs</i> <i>5</i> very long, located anterolaterally (along epistoma), <i>fs</i> <i>5</i> 1.5 times as long as <i>fs</i> <i>4</i> (Fig. 31). <i>Les</i> almost as long as <i>des</i> <i>3</i>; <i>ves</i> <i>1</i> short and <i>ves</i> <i>2</i> long. Postepicranial area with 1 <i>pes</i> and with 2–3 sensilla. Antennal segment membranous, bearing conical sensorium and 2 very short, conical, sensilla (Fig. 34). Clypeus (Fig. 35) 3 times as wide as long; with 2 very short <i>cls</i>, and 1 sensillum, all located posterolaterally; anterior margin slightly rounded inside. Labrum (Fig. 35) approximately 3.5 times as wide as long; <i>lms</i> <i>1</i> distinctly shorter than <i>lms</i> <i>2</i>, and slightly longer and larger than <i>lms</i> <i>3</i>; anterior margin slightly sinuate. Epipharynx (Fig. 36) with 2 elongated, finger-like <i>als</i>, similar in length; with 3 short <i>ams</i>, similar in length; with 2 very short and fingerlike <i>mes</i> (see comments about <i>ams</i> and <i>mes</i> in Material and Methods); labral rods elongate, kidney-shaped, strongly converging posteriorly. Mandibles (Fig. 33) with 2 <i>mds</i> different in length. Maxilla (Fig. 32): stipes with 1 long <i>stps</i>, and with 2 long <i>pfs</i>, almost of equal length, 1 very short <i>mbs</i>; mala with 4 slightly curved <i>dms</i>, different in length; with 3 very short <i>vms</i>, almost of equal length. Maxillary palpi: length ratio of basal and distal palpomeres 1: 1.6; basal palpomera with 1 short <i>mxps</i>; distal palpomera with group of 3–4 conical, cuticular apical processes. Prementum (Fig. 32) almost rounded, with 1 <i>prms</i>; margin of ligula slightly curved inside; ligula with 2 very short <i>ligs</i>; premental sclerite clearly visible. Postmentum (Fig. 32) with 2 <i>pms</i>, <i>pms</i> <i>1</i> absent, very long <i>pms</i> <i>2</i>, 4 times as long as <i>pms</i> <i>3</i>. THORAX AND ABDOMEN. Body length 3.50–4.30 mm (see Table. 1), elongate (Fig. 37). Abdominal segments I– V almost equal in length, slightly larger than abdominal segment VI and VII (Fig. 37). Spiracles on abdomen in posterior parts of segments (abdominal seg. I–VIII). Chaetotaxy of body rather reduced. Setae long to very short and light yellow. <b>Thorax.</b> Prothorax (Fig. 38) with 10 <i>prn</i>, 9 macro- and 1 microsetae; 2 moderately long <i>ps</i> of same length; 1 <i>eus</i>. Meso- and metathorax (Fig. 38) with 1 moderately long <i>prs</i>; 1 moderately long and 1 short <i>pds</i>; alar area with moderately long 1 <i>as</i>; 1 very short <i>ss</i>; 1 moderately long <i>eps</i>; 1 moderately long <i>ps</i>; and 1 <i>eus</i>. Each pedal area of thoracic segments well-separated and with 2 <i>pda</i>. <b>Abdomen.</b> Abdominal segments I–VII (Figs. 39, 40) with 1 long <i>prs</i>; 3 <i>pds</i> of different length, <i>pds</i> <i>1</i> and <i>pds</i> <i>3</i> very short, <i>pds</i> <i>2</i> long; 2 <i>ss</i> of different length, <i>ss</i> <i>1</i> very short to minute, <i>ss</i> <i>2</i> moderately long; 2 <i>eps</i> in equal length; 2 <i>ps</i> of different length, <i>ps</i> <i>1</i> short and <i>ps</i> <i>2</i> moderately long; 1 long <i>lsts</i>; and 2 moderately long <i>eus</i>. Abdominal segment VIII (Fig. 40) with 1 moderately long <i>prs</i>; 3 <i>pds</i> of different length, <i>pds</i> <i>1</i> and <i>pds</i> <i>3</i> very short, <i>pds</i> <i>2</i> moderately long; 1 very short to minute <i>ss</i>; 2 moderately long <i>eps</i> in equal length; 2 <i>ps</i> of different length, <i>ps</i> <i>1</i> short and <i>ps</i> <i>2</i> moderately long; 1 moderately long <i>lsts</i>; and 2 moderately long <i>eus</i>. Abdominal segment IX (Fig. 40) with 2 <i>ds</i> of different length, <i>ds</i> <i>1</i> short and <i>ds</i> <i>2</i> moderately long; 2 <i>ps</i> of different length, <i>ps</i> <i>1</i> very short and <i>ps</i> <i>2</i> moderately long; and 2 moderately long <i>sts</i> in equal length. Anal lobes on abdominal segment X (Fig. 40) with 2 minute setae. <b>Description of pupa.</b> COLORATION. Body white. MORPHOLOGY (Figs. 41–45). Body length 2.35 –3.00 mm; widest part 1.15 –2.00 mm (see Table. 2). Body rather stocky. Rostrum moderately long, approximately 4 times as long as wide, reaching mesocoxae. Pronotum 1.6 times as wide as long. CHAETOTAXY (Figs. 41–45). Setae distinct, medium long, unequal in length, brown; on pronotum and head placed on small protuberances. Setae clearly visible, medium long, unequal in length, brown; on pronotum and head placed on small protuberances. Setae on head different in length, <i>sos</i> 3–4 times shorter than <i>os</i>; <i>rs</i> as long as <i>pas</i> (Fig. 42). <i>Ds</i> <i>2</i> slightly shorter than other setae on pronotum (Fig. 44). Setae on abdominal segments I–VIII placed posteromedially and posterolaterally; all abdominal setae located on thorn-like protuberances. Pseudocerci short, triangular in shape. <b>Biological observations.</b> The larvae fed on seeds, and mature larvae left the capsule and entered the soil to pupate. Pupation was observed 8–10 days after the larvae entered the soil. Adults were found in the cells 7–9 days later. <b>Remarks.</b> This species is primarily distributed in Central Europe and reached northern France in the west and central Italy and Romania in the south. It is also reported to be in Asia and the Far East (Caldara 1985, 2013). <i>Sibinia tibialis</i> seems monophagous on <i>Silene otites</i> (L.) Wib. (Dieckmann 1988; Rheinheimer &amp; Hassler 2010), although the adult was also collected on <i>S</i>. <i>tatarica</i> (L.) Pers. in Germany (Neresheimer &amp; Wagner 1939) and on <i>Minuartia setacea</i> (Thuill) Hayek in France (Hoffmann 1955 under <i>S</i>. <i>guillebeaui</i> Desbrochers des Loges, 1897).
description: Published as part of <i>Skuhrovec, Jiří, Gosik, Rafał, Caldara, Roberto &amp; 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, pp. 151-187 in Zootaxa 2</i> on pages 163-164, DOI: 10.11646/zootaxa.3955.2.1, http://zenodo.org/record/239116
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