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Zercoseius Berlese
Superorder Parasitiformes » Order Mesostigmata » Suborder Monogynaspida » Infraorder Gamasina » Hyporder Dermanyssiae » Superfamily Phytoseioidea » Family Blattisociidae » Genus Zercoseius
, some +/- tricarinatetricarinate:-pilose, some posteriorposterior: and clubbed to spatulatespatulate:; genital shieldgenital shield:Species of Arrhenoseius have the metapodal elements fused to the peritrematalperitrematal:
(peritrematic) of or referring to the peritreme; adjectival form of peritreme.
shield and do not have clubbed to spatulatespatulate:
(Latin spatula = spoon) spatula-shaped; variously interpreted, but usually referring to setae that are flattened and somewhat expanded distally. setae.
Leg II of female often thickened, with strong, opposable spine-likespine-like:
a seta or other structure that resembles a thorn or spine; spiniform. setae on ventralventral:
relating to the lower or under side; opposed to dorsal.
surface on femurfemur:
(pl. femora) major leg segment between trochanter and genu; often subdivided into a basifemur and a telofemur.
, genugenu:
(pl. genua) (= patella) the 4th leg segment, between the femur and tibia.
, tibiatibia:
(pl. tibiae) the leg segment between the genu and the tarsus., and tarsustarsus:
(pl. tarsi) the subdistal leg segment between the tibia and the pretarsus (apotele).
; fixed chelachela:
a pincer, as in a pseudoscorpion's distal pedipalpal segments.
multidentate, its distaldistal:
towards the free end of an appendage.
extremity usually with enlarged rounded margin bearing a row of small rasping teeth; trochantertrochanter:
the leg segment between the coxa and the femur. I with 4 or 5 setae (av1 absent); genugenu:
(pl. genua) (= patella) the 4th leg segment, between the femur and tibia.
and tibiatibia:
(pl. tibiae) the leg segment between the genu and the tarsus. I each with maximum of 11 setae (pd3, av2 absent).............................. Hoploseius
- Leg II of female not thickened, without spine-like ventral setaeventral setae:
in the Lindquist-Evans system used in the Mesostigmata, the ventral region has up to three longitudinal rows (Jv, Zv, Lv) with 1-5 transverse row designations.
; fixed chelachela:
a pincer, as in a pseudoscorpion's distal pedipalpal segments.
with few to many teeth, its distaldistal:
towards the free end of an appendage.
extremity not enlarged, without row of small teeth; trochantertrochanter:
the leg segment between the coxa and the femur. I with 6 setae (av1 present); genugenu:
(pl. genua) (= patella) the 4th leg segment, between the femur and tibia.
and tibiatibia:
(pl. tibiae) the leg segment between the genu and the tarsus. I each with 13 (rarely 12) setae (pd3 and usually av2 present).............................. 2
Corniculicorniculus:
(pl. corniculi) (also, external malae) a usually horn-like process (sometimes toothed, bifurcate, trifurcate, spine-like, spatulate, or membranous) on the subcapitulum of parasitiform mites that usually supports the salivary styli. A toothed corniculus could be confused with a rutellum, a possibly homologous structure in Acariformes and Opilioacarida. Phytoseiid image is spatulate corniculus.
narrowly separated, usually slender; epistomegnathotectum:
(= epistome, tectum) an often membranous dorsal projection of the anterior margin of the basis capitulum in Mesostigmata; often diagnostic at family-, genus- or species-levels; also often difficult to see without high magnification and good optics.
convex, smooth; fixed chelachela:
a pincer, as in a pseudoscorpion's distal pedipalpal segments.
with few or no teeth; peritrematalperitrematal:
(peritrematic) of or referring to the peritreme; adjectival form of peritreme.
shield slender, barely wider than stigmastigma:
the opening to the tracheal system.
at level of stigmastigma:
the opening to the tracheal system.
; female with humeral seta (r3) usually on soft cuticle beside dorsaldorsal:
relating to the upper or back side; opposed to ventral.
shield; protonymphprotonymph:
the first nymphal stage or instar, usually octopod.
with 2 setae on palp trochantertrochanter:
the leg segment between the coxa and the femur...... 3
- Corniculicorniculus:
(pl. corniculi) (also, external malae) a usually horn-like process (sometimes toothed, bifurcate, trifurcate, spine-like, spatulate, or membranous) on the subcapitulum of parasitiform mites that usually supports the salivary styli. A toothed corniculus could be confused with a rutellum, a possibly homologous structure in Acariformes and Opilioacarida. Phytoseiid image is spatulate corniculus. well separated, stout; epistomegnathotectum:
(= epistome, tectum) an often membranous dorsal projection of the anterior margin of the basis capitulum in Mesostigmata; often diagnostic at family-, genus- or species-levels; also often difficult to see without high magnification and good optics. convex or triramous, smooth or denticulatedenticulate:
bearing small, sharp processes, e.g., the hypostome of ticks.
; fixed chelachela:
a pincer, as in a pseudoscorpion's distal pedipalpal segments.
usually with many teeth; peritrematalperitrematal:
(peritrematic) of or referring to the peritreme; adjectival form of peritreme.
shield clearly wider than diameter of stigmastigma:
the opening to the tracheal system.
at level of stigmastigma:
the opening to the tracheal system.
; female with humeral setae on dorsaldorsal:
relating to the upper or back side; opposed to ventral.
shield; protonymphprotonymph:
the first nymphal stage or instar, usually octopod.
with 1 seta on palp trochantertrochanter:
the leg segment between the coxa and the femur............................... 4
Dorsaldorsal:
relating to the upper or back side; opposed to ventral.
shield without midlateral incisions; opisthonotalopisthonotal:
dorsal opisthosoma.
region of dorsaldorsal:
relating to the upper or back side; opposed to ventral.
shield holotrichous, with 15 pairs of setae; fixed chelachela:
a pincer, as in a pseudoscorpion's distal pedipalpal segments.
well developed or reduced; female without isolated metasternal plates; male leg IV without enlarged, spine-likespine-like:
a seta or other structure that resembles a thorn or spine; spiniform. setae.............................. Blattisocius
- Dorsaldorsal:
relating to the upper or back side; opposed to ventral.
shield with midlateral incisions; opisthonotalopisthonotal:
dorsal opisthosoma.
region of dorsaldorsal:
relating to the upper or back side; opposed to ventral.
shield hypotrichous, with 12 pairs of setae (lacking a pair in each of J, Z, S series); fixed chelachela:
a pincer, as in a pseudoscorpion's distal pedipalpal segments.
well developed; female with isolated metasternal plates; male leg IV with several enlarged spine-likespine-like:
a seta or other structure that resembles a thorn or spine; spiniform. setae.............................. Adhaerenseius
Female and male with all marginal r–R setae on edge of dorsaldorsal:
relating to the upper or back side; opposed to ventral.
shield, opisthonotalopisthonotal:
dorsal opisthosoma.
region of shield with 20 pairs of setae; rows of deutosternal denticlesdeutosternal denticles:
rows of small teeth-like projections (often irregular and sometimes reduced to a single tooth) running transversely across the deutosternal groove and sometimes onto the lateral faces of the subcapitulum.
narrow, each with 2–4 denticlesdenticles:
small tooth-like processes, e.g., on the subcapitula of ticks and many mesostigmatans.
; movable chelachela:
a pincer, as in a pseudoscorpion's distal pedipalpal segments.
with ridge extending from para-axial surface to 1–2 denticlesdenticles:
small tooth-like processes, e.g., on the subcapitula of ticks and many mesostigmatans.
on proximo-ventralventral:
relating to the lower or under side; opposed to dorsal.
surface.............................. Orthadenella
- Female and male with 1–9 pairs of marginal r–R setae on soft cuticle beside dorsaldorsal:
relating to the upper or back side; opposed to ventral.
shield, opisthonotalopisthonotal:
dorsal opisthosoma.
region of shield with maximum of 15 pairs of setae in female, 17 in male; rows of deutosternal denticlesdeutosternal denticles:
rows of small teeth-like projections (often irregular and sometimes reduced to a single tooth) running transversely across the deutosternal groove and sometimes onto the lateral faces of the subcapitulum. moderately wide, each with 5 to many denticlesdenticles:
small tooth-like processes, e.g., on the subcapitula of ticks and many mesostigmatans.
; movable chelachela:
a pincer, as in a pseudoscorpion's distal pedipalpal segments.
lacking ridge or denticlesdenticles:
small tooth-like processes, e.g., on the subcapitula of ticks and many mesostigmatans.
on paraxialparaxial:
against the axis of the body (also adaxial), e.g., the inner face of the chelicera.
and ventralventral:
relating to the lower or under side; opposed to dorsal.
surface.............................. 5
Adults with 1 pair of marginal setae (R1) on soft lateral cuticle; female metapodal platesmetapodal shields:
(also metapodal plates, metapodal platelets, metapodal sclerites) in Mesostigmata, a pair (sometimes fused) of small sclerites posteriad coxae IV in the ventral region that probably reflect muscle attachments.
incorporated into ventrianal or peritrematalperitrematal:
(peritrematic) of or referring to the peritreme; adjectival form of peritreme.
plates, and ventrianal shieldventrianal shield:
in Mesostigmata, a ventral shield bearing the anal opening, circum anal setae, and one or more pairs of ventral setae or pores (lyrifissures) [see anal shield]; maybe rather narrow or very broad and covering most of the gaster. with 7 pairs of setae in addition to circumanals; male with holoventral shield............................... 6
- Adults with 3–9 pairs of marginal setae (r–R) on soft lateral cuticle; female metapodal platesmetapodal shields:
(also metapodal plates, metapodal platelets, metapodal sclerites) in Mesostigmata, a pair (sometimes fused) of small sclerites posteriad coxae IV in the ventral region that probably reflect muscle attachments. free on soft cuticle, and ventrianal shieldventrianal shield:
in Mesostigmata, a ventral shield bearing the anal opening, circum anal setae, and one or more pairs of ventral setae or pores (lyrifissures) [see anal shield]; maybe rather narrow or very broad and covering most of the gaster. with 6 or fewer pairs of setae in addition to circumanals; male usually with separate sternogenital, ventrianal and peritrematalperitrematal:
(peritrematic) of or referring to the peritreme; adjectival form of peritreme.
-exopodal shields.............................. 7
Podonotalpodonotal:
relating to the dorsal podosoma, the region of the idiosoma over the legs.
region of adult dorsaldorsal:
relating to the upper or back side; opposed to ventral.
shield lacking setae z1, s1, s2; female with metapodal platesmetapodal shields:
(also metapodal plates, metapodal platelets, metapodal sclerites) in Mesostigmata, a pair (sometimes fused) of small sclerites posteriad coxae IV in the ventral region that probably reflect muscle attachments. incorporated into ventrianal shieldventrianal shield:
in Mesostigmata, a ventral shield bearing the anal opening, circum anal setae, and one or more pairs of ventral setae or pores (lyrifissures) [see anal shield]; maybe rather narrow or very broad and covering most of the gaster.; female ventrianal shieldventrianal shield:
in Mesostigmata, a ventral shield bearing the anal opening, circum anal setae, and one or more pairs of ventral setae or pores (lyrifissures) [see anal shield]; maybe rather narrow or very broad and covering most of the gaster. lacking setae ZV1 but with JV5 on its posterolateral margins; genugenu:
(pl. genua) (= patella) the 4th leg segment, between the femur and tibia.
III with 10, tibiaetibia:
(pl. tibiae) the leg segment between the genu and the tarsus. III and IV with 9 and 10 setae, respectively (pl–2 present on each of these segments).............................. Zercoseius
- Podonotalpodonotal:
relating to the dorsal podosoma, the region of the idiosoma over the legs.
region of adult dorsaldorsal:
relating to the upper or back side; opposed to ventral.
shield holotrichous; female with metapodal platesmetapodal shields:
(also metapodal plates, metapodal platelets, metapodal sclerites) in Mesostigmata, a pair (sometimes fused) of small sclerites posteriad coxae IV in the ventral region that probably reflect muscle attachments. incorporated into posteriorposterior:
the back part of the body or towards that region in comparison, e.g., 'posterior to'.
margins of peritrematalperitrematal:
(peritrematic) of or referring to the peritreme; adjectival form of peritreme.
shields; female ventrianal shieldventrianal shield:
in Mesostigmata, a ventral shield bearing the anal opening, circum anal setae, and one or more pairs of ventral setae or pores (lyrifissures) [see anal shield]; maybe rather narrow or very broad and covering most of the gaster. with setae ZV1 but with JV5 inserted on soft cuticle behind its posterolateral margins; genugenu:
(pl. genua) (= patella) the 4th leg segment, between the femur and tibia.
III with 9, tibiaetibia:
(pl. tibiae) the leg segment between the genu and the tarsus. III and IV with 8 and 9 setae, respectively (pl–2 absent from each of these segments).............................. Arrhenoseius
Female with 11 pairs of setae on podonotalpodonotal:
relating to the dorsal podosoma, the region of the idiosoma over the legs.
region of dorsaldorsal:
relating to the upper or back side; opposed to ventral.
shield (s5 absent) and 7–10 pairs of setae on opisthonotalopisthonotal:
dorsal opisthosoma.
region (Z1, J2 absent); epigynialepigynal:
(also epigynial) of or relating to the female genital opening or a shield protecting it.
shield rounded posteriorly; ventral setaeventral setae:
in the Lindquist-Evans system used in the Mesostigmata, the ventral region has up to three longitudinal rows (Jv, Zv, Lv) with 1-5 transverse row designations.
ZV1, JV5 absent; cervixcervix:
(= calyx) in phytoseioid Mesostigmata (Phytoseiidae, Blattisociidae, Otopheidomenidae, Podocinidae), a collar-like structure of the sperm access system which surrounds the base of the vesicle.
of spermathecaspermatheca:
a structure in the female for storing sperm, typically sac-like.
not sclerotized; movable chelachela:
a pincer, as in a pseudoscorpion's distal pedipalpal segments.
with 4 teeth; genuagenu:
(pl. genua) (= patella) the 4th leg segment, between the femur and tibia.
II and III with 10 and 8 setae respectively (pv1 absent).............................. Aceodromus
- Female with 12–23 pairs of setae on podonotalpodonotal:
relating to the dorsal podosoma, the region of the idiosoma over the legs.
region of dorsaldorsal:
relating to the upper or back side; opposed to ventral.
shield (s5 present) and 10–15 pairs of setae on opisthonotalopisthonotal:
dorsal opisthosoma.
region (Z1, J2 present); epigynialepigynal:
(also epigynial) of or relating to the female genital opening or a shield protecting it.
shield usually truncate posteriorly; ventral setaeventral setae:
in the Lindquist-Evans system used in the Mesostigmata, the ventral region has up to three longitudinal rows (Jv, Zv, Lv) with 1-5 transverse row designations.
ZV1, JV5 present; cervixcervix:
(= calyx) in phytoseioid Mesostigmata (Phytoseiidae, Blattisociidae, Otopheidomenidae, Podocinidae), a collar-like structure of the sperm access system which surrounds the base of the vesicle. of spermathecaspermatheca:
a structure in the female for storing sperm, typically sac-like.
well sclerotised; movable chelachela:
a pincer, as in a pseudoscorpion's distal pedipalpal segments.
with 3 teeth (rarely 4); genuagenu:
(pl. genua) (= patella) the 4th leg segment, between the femur and tibia.
II and III usually with 11 and 9 setae respectively (pv1 usually present).............................. Lasioseius
Species of Zercoseius are rare soil-inhabiting mites.
Author: David E. Walter
Content last updated Sept. 2006, unless indicated otherwise
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