Abacarus longilobus
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BibTeX: @article{Skoracka2002Zootaxa54, RIS/ Endnote: TY - JOUR Wikipedia/ Citizendium: <ref name="Skoracka2002Zootaxa54">{{Citation |
Ordo: Prostigmata
Familia: Eriophyidae
Genus: Abacarus
Name
Abacarus longilobus Skoracka, Anna, 2002 – Wikispecies link – Pensoft Profile
- Abacarus longilobus Skoracka, Anna, 2002, Zootaxa 54: 6-13.
Description
Description: Female (Figs 34) (holotype and 9paratypes): body length 238 (185296), width 62 (5767), body spindleform. Dorsomedian ridge narrow, ending near 16 th dorsal annulus from end, dorsal furrow and lateral ridges ending near 67 th annulus from end. Gnathosoma 25 (2230) long; dorsal pedipalpal genual setae d11 (1012) long; v setae (sensory peg) 3 (23) long; ep setae 2 (23) long, chelicerae 22 (1923) long, almost straight. Prodorsal shield elongatetriangular, 53 (4757), long; 47 (4452) wide, with pronounced, elongated frontal lobe over gnathosoma, 17 long. Sculpture of prodorsal shield: median line absent; admedian lines present only on posterior half of shield, parallel to each other; submedian lines entire only on anterior 1 / 3 and posterior 1 / 6 part of shield, parallel to lateral margins of shield. Distinct, conical microtubercles present on surface near shield. Tubercles of setae sc located on rear margin of shield, 2 (23) long, 3 (34) wide, 31 (27 31) apart; setae sc13 (812) long, projecting to rear. Leg I 40 (3646) long; femur 10 (1011) long, with seta bv15 (1215) long; position of seta bv4 (4) from ventral, proximal margin of femur; genu 6 (67) long, with seta l’’26 (2230) long, position of seta l’’4 (4) from dorsal, proximal margin of genu; tibia 8 (89) long, with seta l’10 (1011) long; position of seta l’5 (45) from ventral, proximal margin of tibia. Tarsus 8 (89) long, with three setae: ft’’30 (2530) long; ft’28 (2127) long, u’7 (57) long; tarsal solenidion 10 (910) long; tarsal empodium simple, 8 (89)rayed, symmetrical, 10 (1012) long.
Leg II 40 (3641) long; femur 11 (1012) long, with seta bv21 (1720) long; position of seta bv5 (45) from ventral, proximal margin of femur; genu 5 (56) long, with seta l’’12 (1217) long; position of seta l’’3 (34) from dorsal, proximal margin of genu; tibia 7 (67) long. Tarsus 8 (89) long, with three setae: ft’’28 (2227) long, ft’12 (1014) long, u’6 (67) long; tarsal solenidion 10 (1011) long; tarsal empodium 8 (89)rayed, symmetrical, 10 (1012) long.
Coxae with a pattern of numerous lines and dashes, some lines with microtubercles; slender sternal line present. Setae 1 b10 (1012) apart, 11 (1113) long; setae 1a 9 (79) apart, 29 (2428) long; setae 2a 25 (2227) apart, 53 (4652) long; distance between setae 1 b and 1a 7 (78), distance between setae 1 a and 2a 9 (810).
Opisthosoma with 73 (6674) dorsal annuli, 78 (6881) ventral annuli, 6 (57) coxogenital annuli. Annuli with microtubercles; ventral microtubercles minute, conical and pointed, from level of setae f elongated; microtuberles on dorsal annuli beadlike, present only on ridges.
Setae c 2 47 (3848) long, located on 10 th (8 th– 10 th) ventral annulus from coxae II; tubercles c 2 63 (4864) apart; ventral setae d67 (4367) long, located on 26 th (21 st– 28 th) ventral annulus; tubercles d36 (3340) apart; setae e48 (3046) long, located on 47 th (40 th– 48 th) ventral annulus; tubercles e13 (1116) apart; setae f40 (2538) long, located on 74 th (64 th– 77 th) ventral annulus, 5 th (5 th) annulus from rear; tubercles f25 (2325) apart. Setae h 1 5 (56) long, 8 (68) apart; setae h 2 83 (7298) long, 13 (1113) apart; distance between h 1 and h 2 –2 (23).
Genital parts 17 (1619) long, 24 (2327) wide, genital coverflap with 11 (1012) longitudinal striae; setae 3a 40 (3043) long, 14 (1317) apart.
Male (Fig. 5) (10 specimens): body length 178221; body width 4660, spindleform; dorsomedian ridge shorter than in female. Gnathosoma 1726 long; dorsal pedipalpal genual seta d810 long; v setae (sensory peg) 2 long; ep setae 23 long chelicerae 1423 long, almost straight. Prodorsal shield elongatetriangular, 4649 long; 3846 wide, with pronounced, elongate frontal lobe over gnathosoma, which is shorter than those in female; pattern of shield similar to that of a female. Tubercles of setae sc located on the rear margin of shield, 23 long, 3 wide, 2430 apart; setae sc911 long, projecting to rear.
Leg I 32 37 long; femur 810 long, with seta bv814 long; position of seta bv34 from ventral, proximal margin of femur; genu 56 long, with seta l’’2029 long; position of seta l’’34 from dorsal, proximal margin of genu; tibia 68 long, with seta l’810 long; position of seta l’35 from ventral, proximal margin of tibia. Tarsus 78 long, with three setae: ft’’2229 long, ft’1823 long, u’57 long; tarsal solenidion 810 long; tarsal empodium simple, 78 rayed, symmetrical, 911 long.
Leg II 3135 long; femur 910 long, with seta bv1518 long; position of seta bv35 from ventral proximal margin of femur; genu 45 long, with seta l’’1015 long; position of seta l’’23 from dorsal, proximal margin of genu; tibia 57 long. Tarsus 7 long, with three setae: ft’’2128 long, ft’1012 long, u’57 long; tarsal solenidion 810 long; tarsal empodium 78 rayed, symmetrical, 910 long.
Coxae with a pattern of lines and microtubercles on coxae I, dashes on coxae II. Setae 1 b910 apart, 710 long; setae 1a 6 9 apart, 1929 long; setae 2a 19 21 apart, 4052 long; distance between setae 1 b and 1a 6 8, distance between setae 1 a and 2a 7 9. Opisthosoma with 5765 dorsal annuli, 5869 ventral annuli, 57 coxogenital annuli. Annuli with microtubercles; dorsal microtubercels similar to that of female; ventral microtubercles tiny, conical, pointed. Setae c 2 3646 long, located on 7 th 9 th ventral annulus from coxae II; tubercles c 2 45 51 apart; ventral setae d6267 long, located on 18 th 22 nd ventral annulus; tubercles d26 29 apart; setae e2440 long, located on 33 rd 38 th ventral annulus; tubercles e1014 apart; setae f2741 long, located on 54 th 65 th ventral annulus, 5 th annulus from rear; tubercles f1924 apart. Setae h 1 45 long, 67 apart; setae h 2 6781 long, 1011 apart; distance between h 1 and h 2 –2. Genital parts 1417 long, 1921 wide; setae 3a 26 32 long, 1417 apart; granulated. Nymph (Fig. 6) (6 specimens): body length 162206; body width 4460; spindleform. Dorsomedial ridge slender, ending near 67 th annulus from end. Gnathosoma 1626 long; dorsal pedipalpal genual seta d68 long; v setae (sensory peg) 2 long; ep setae 3 long; chelicerae 1720. Prodorsal shield with a elongated lobe over base of chelicerae; shield triangular, its posterior margin bowed; 3741 long, 3544 wide. Sculpture of prodorsal shield: median line absent; admedian lines parallel to each other near; submedian lines parallel to lateral margins of shield. Conical microtubercles present on surface near shield. Tubercles of setae sc23 long, 24 wide, located on rear margin of shield, 2226 apart; setae sc710 long. Leg I 2735 long; femur 69 long, with seta bv79 long; position of seta bv34 from ventral, proximal margin of femur; genu 45 long, with seta l’’1825 long; position of seta l’’23 from dorsal, proximal margin of genu; tibia 56 long, with seta l’710 long; position of seta l’2.53 from ventral, proximal margin of tibia. Tarsus 56 long, with three setae: ft’’1823 long; ft’1418 long, u’46 long; tarsal solenidion 68 long; tarsal empodium simple, 67 rayed, symmetrical, 79 long. Leg II 2332 long; femur 68 long, with seta bv1113 long; position of seta bv34 from ventral, proximal margin of femur; genu 45 long, with seta l’’810 long; position of seta l’’23 from dorsal, proximal margin of genu; tibia 34 long. Tarsus 56 long, with three setae: ft’’1720 long, ft’78 long, u’46 long; tarsal solenidion 69 long; tarsal empodium 67 rayed, symmetrical, 79 long. Coxae with a pattern of short, slender lines and conical microtubercles. Setae 1 b911 apart, 6 long; setae 1a 7 8 apart; setae 2a 20 24 apart, 3035 long; distance between setae 1 b and 1a 6 8, distance between setae 1 a and 2a 7 8. Opisthosoma with 4764 dorsal annuli, 4560 ventral annuli, 78 coxogenital annuli. Annuli with microtubercles; dorsal microtubercles sparse on ridge, beadlike, near ridge conical, pointed; ventral microtubercles conical, larger than dorsal. Setae c 2 2432 long, located on 6 th 9 th ventral annulus from coxae II; tubercles c 2 40 54 apart; ventral setae d2938 long, located on 15 th– 21 st ventral annulus; tubercles d2532 apart; setae e1025 long, located on 2636 ventral annulus; tubercles e1116 apart; setae f1927 long, located on 41 st 56 th ventral annulus, 5 th annulus from rear; tubercles f1822 apart. Setae h 1 24 long, 56 apart; setae h 2 910 apart; distance between h 1 and h 2 –2. Setae 3a 8 13 long, 810 apart. Larva not seen. Etymology: the specific designation is derived from the combination of words: longus (Latin) – long and lobus, because of the very long lobe of the prodorsal shield over the gnathosoma in this species. Host plant: Bromus inermis Leyss. (Poaceae).
Relation to host plant: mites are vagrants on both leaf surfaces. Type locality: Poland, Poznañ, Cytadela (16 ° 56 ' E; 52 ° 25 ' N); scarp, southern exposition; 20.06.1999; leg. A. Skoracka. Material examined: holotype female (ABALON 248 F 7), 20 female partypes (ABA LON248 F 16, ABALON 248 F 819), 14 males (ABALON 248 M 114), 17 nymphs (ABA LON248 N 117). Differential diagnosis: The new species is most similar to Abacarus stadelbacheri Petanovic, 1993 (from Geranium dissectum L., Geraniaceae, Italy) by the shape of the lobe over the gnathosoma, coxae ornamentation and appearance of dorsal microtubercles. Both species have similar numbers of annuli: dorsal (72 in A. stadelbacheri, 73 in A. longilobus) and ventral (80 in A. stadelbacheri, 78 in A. longilobus), width of genitalia (24 in both species) and distance between 3 a setae (14 in both species). A. longilobus can be distinguished from A stadelbacheri by the sculpture of the prodorsal shield and length of the dorsomedian ridge. In A. stadelbacheri on the prodorsal shield are long admedian lines and the dorsomedian ridge is ending near ½ of the opisthosoma. In A. longilobus dorsomedian ridge is longer, the admedian lines are present only on the posterior part of the shield, and the submedian lines are also present. Besides, those two species differ in the width of the prodorsal shield (56 in A. stadelbacheri, 47 in A. longilobus), numbers of empodial rays (7 in A. stadelbacheri, 8 in A. longilobus), length of opisthosomal setae d: (38 in A. stadelbacheri, 67 in A. longilobus), e (16 in A. stadelbacheri, 48 in A. longilobus), f (25 in A. stadelbacheri, 40 in A. longilobus), 3 a (19 in A. stadelbacheri, 40 in A. longilobus). Notice: This species was also found on three other Poaceae species: Agropyron repens (L.) P. B., Arrhenantherum elatius (L.) P. Beauv. ex J. Presl & C. and Bromus erectus Huds. The greatest intensity of its infestation was on B. inermis –49.6 (n = 7; 95 % CI: 20.7 – 101.3) and on A. elatius –44.5 (n = 8; 18.5 – 97.0) specimens per stem. On other plants the mean number of specimens per stem was considerable lower: on A. repens –7.3 (n = 13; 2.0 – 20.3), on B. erectus –10.8 (n = 10; 3.6 – 28.9).
Taxon Treatment
- Skoracka, Anna; 2002: Two new species of eriophyoid mites (Acari: Eriophyoidea) from grasses in Poland, Zootaxa 54: 6-13. doi
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