Gyraulus parvus (Mollusca: Gastropoda) in the Czech Republic

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Figs 54–61. Harpalus (Harpalus) solitaris Dejean. Third instar larva: 54–head capsule (dorsal view). 55–nasale.56–antenna. 57–mandible. 58–maxilla. 59–labium. 60–tergum I. 61–urogomphi. Scales: 1 mm (Figs 54, 60, 61),0.5 mm (Figs 56, 57, 58, 59), 0.3 mm (Fig. 55).113
penicillus present; maxilla slender, stipes more than 3 times as long as wide; labium short and ratherrobust.THORAX AND ABDOMEN. Not available.Third instarSame character states as in the first instar except for following:HABITUS. Width of head capsule 1.37 mm in one specimen.MICROSCULPTURE. Isodiametric microsculpture on head, thoracic and abdominal tergites. Granulatedmicrosculpture on pronotal prescutum and postscutum and on postscuta of mesonotum, metanotumand abdominal tergites I–II(III).CHAETOTAXY. Head: 2 secondary setae on inner side of antennomere II, 2 setae on outer side ofstipes, 1 seta near apex of labial palpomere I, 8 pairs of setae on dorso-lateral surface of prementum,4 setae near outer stemmatal furrow. Thorax: 2 small secondary setae along notal carina on prothorax;8 additional spines on either side of anterior femora. Abdomen: seta TE11 on abdominal tergavery reduced or rudimental. Length of seta URβ only about 0.2 times that of UR4 and about 0.3times that of URγ.HEAD (Fig. 64) transverse (index weight/length 1.4); nasale (Fig. 65) more prominent, with 9–10central teeth, two lateral on each side distinctly longer, ventral row consists of 25 teeth, adnasaliamore sloping; cervical grooves more deepened and bent; coronal suture longer than width ofantennomere I; outer stemmatal furrow developed. Extremities more slender; antenna (Fig. 66);mandible (Fig. 67) with one distinct additional tooth in front of retinaculum; maxilla (Fig. 68); labium(Fig. 69).THORAX. Legs with unequal claws, anterior distinctly shorter than posterior.ABDOMEN. Urogomphi (Fig. 70) long and parallel, 1.8 times as long as width of tergum IX and aboutone third longer than anal tube.LARVAL DIAGNOSIS OF SUBGENUS HARPALUSFirst instarHABITUS. Typical Harpalini larva with great and transverse head capsule and pronotum, body beingnarrower caudad.MICROSCULPTURE. Mostly only parts of frontale and parietale and lateral sides of pronotum withisodiametric microsculpture. Granulated microsculpture on pronotal prescutum and postscutumand on the postscuta of mesonotum, metanotum and of anterior abdominal tergites. Pointed microsculpturesometimes on tergite IX, on base of urogomphi and on antero-lateral parts of abdominalscuta.CHAETOTAXY. All ancestral setae and pores, except for seta LA4 on prementum, present; one additionalseta of ancestral origin on adnasalia, and mostly one additional pair of spiniform setae orspines on all pairs of femora.HEAD. Distinctly transverse (index width/length more than 1.1), nasale diverse but frequentlyprominent and always with central protuberance and one pair of lateral teeth on each side; cervicalgrooves and coronal suture always present; egg-bursters consist of 2 rows of 1–10 teeth alongfrontal suture. Antennae mostly a little longer than mandibles; mandible more or less incurvate andstout, as a rule twice as long as wide, frequently with only one or none tooth in front of retinaculum,exceptionally with three extra teeth, penicillus present; six stemmata well-developed; maxillarystipes different in length, 1.5 to 5 times as long as wide, lacinia distinct, with stout lateral seta MX6;prementum longer than wide, ligula at least as wide as base of palpomere I, frequently bifid at apex.114
Page 2: Acta Soc. Zool. Bohem. 66: 81-84, 2
Page 5 and 6: REFERENCESBERAN L. & HORSÁK M. 199
Page 7: Tab. 1. Nematodes studied with the
Page 10: Tab. 2. The dimensions (mm) of thir
Page 14 and 15: Family Acuariidae Railliet, Henry e
Page 16 and 17: Fig. 7. Cosmocephalus obvelatus (Cr
Page 18 and 19: A c k n o w l e d g e m e n t sThe
Page 20 and 21: Acta Soc. Zool. Bohem. 66: 99-119,
Page 22 and 23: Figs 1-10. Harpalus (Harpalus) atra
Page 24 and 25: Figs 11-19. Harpalus (Harpalus) cis
Page 26 and 27: Figs 20-27. Harpalus (Harpalus) lut
Page 28 and 29: Figs 28-35. Harpalus (Harpalus) pic
Page 30 and 31: Figs 36-44. Harpalus (Harpalus) sax
Page 32 and 33: Figs 45-53. Harpalus (Harpalus) ser
Page 36 and 37: Figs 62-70. Harpalus (Harpalus) xan
Page 38 and 39: Based on the study of our larval ma
Page 40 and 41: EMDEN F. I. van 1942: A key to the
Page 44 and 45: and D. papillifera (Fuhrmann, 1908)
Page 46 and 47: about 1 mm) with only a few eggs in
Page 48 and 49: The number of catfish examined each
Page 50 and 51: number (3.65) of trematodes with ma
Page 52 and 53: cestode was distinctly associated w
Page 54 and 55: from individual months. Tab. 2 show
Page 56 and 57: number (5.57) of males occurred in
Page 58 and 59: intermediate host, copepod, catfish
Page 60 and 61: CHUBB J. C. 1982: Seasonal occurren
Page 64 and 65: efore distal angle of discoidal tri
Page 66 and 67: cells between them and IR2 or MA”
Page 68 and 69: character is less pronounced in Oli
Page 70 and 71: REFERENCESBACHMAYER F. 1952: Fossil
Page 74 and 75: elow) and a 170×90×70 type was us
Page 76 and 77: the brood, first into heaps near th
Page 78 and 79: trophallaxis until the termination
Page 80 and 81: 4. The queen that was accepted was

Gyraulus parvus (Mollusca: Gastropoda) in the Czech Republic

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