Description of new genus Baikalozercon (Acari: Mesostigmata: Zerconidae) with two new species from South Siberia Mountains (Russia) Author Marchenko, Irina I. text Zootaxa 2022 2022-03-28 5120 3 301 333 journal article 20107 10.11646/zootaxa.5120.3.1 84bc66e2-1dab-4d92-a203-38731ecd0fdc 1175-5326 6389389 CF24D701-3121-47F9-8091-EE46C011957C

TABLE 1. Diagnostic characters for three early derivate genera of Zerconidae from Siberia

Characters	Syskenozercon	Halozercon	Baikalozercon
length of female idiosoma	350 µm	450–675 µm	very large, 920–1060 µm
number of setae on peritrematal shields	z1 + 5 dorsal marginal setae	z1	z1 + rx
length of peritreme	short, from coxa IV to mid coxa III	varies length in different species: short—reaches to top of coxa III and long—reaches to top of antero- dorsal spine of coxa II	very long, from coxa IV to mid coxa I, similar length as deutonymphal peritreme
location of genital shield	free	free	anterior part of genital shield extends under posterior sternal shield
epistome form	denticulate medial projection	smooth, pointed medial projection	bifurcate medial projection
male sexual dimorphism of subcapitulum denticles	males unknown	no	one pair of massive denticles located between h2–h3 and pc setae
specific characters of chelicera	–	–	suboval “window” of thin cuticle in basal region of fixed digit
pilus dentilis form	tubular	leaf-shaped	tubular with rounded or bifurcate tip
male sexual dimorphism of chelicerae	males unknown	modification of mobile digit: extended apical edge in some species	modification of fixed digit: extended apical edge with large apical outgrowth (other Zerconidae species with modified male fixed digit)
male sexual dimorphism of legs II	males unknown	no	enlarged spine-like setae located on femur— al1, al2, av1; genu —al1; tibia— al1 or only on femur— al1, al2.