Three new species of Euseius (Mesostigmata: Phytoseiidae) from Tamil Nadu, India, with redescription of Euseius ovalis and key to the Indian species Author Biswas, Shubhadeep Department of Agricultural Entomology, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur- 741252, Nadia, West Bengal, India Author Karmakar, Krishna Department of Agricultural Entomology, Bidhan Chandra Krishi Viswavidyalaya, Mohanpur- 741252, Nadia, West Bengal, India text Zootaxa 2025 2025-01-17 5570 2 281 308 https://doi.org/10.11646/zootaxa.5570.2.3 journal article 307886 10.11646/zootaxa.5570.2.3 fe19a975-6578-4a74-8aba-dafc9eb8cf1c 1175-5326 14735062 0A2743F5-1527-4339-83C4-E1D70AD15831

TABLE 1. Differences in diagnostic characters between Euseius aridophilus Karmakar & Biswas sp. nov.; E. alatus De Leon, 1966; E. bandispermathecae Pramanik & Karmakar, 2016; E. ceylonicus Moraes & Lopes, 2004; E. citrifolius Denmark & Muma, 1970 b; E. dossei Pritchard & Baker, 1962; E. omentum Qayyum, Afzal & Ahmad, 2002; E. plazo Ahmad, Yasmin & Chaudhri, 1987; E. relictus Chaudhri, Akbar & Rasool, 1979; E. sundarbanensis Karmakar & Bhowmik, 2018; and E. vulgaris (Liang & Ke, 1983). Sources of measurements: Original papers of De Leon, 1966; Pramanik & Karmakar, 2016; Moraes et al., 2004; Denmark & Muma, 1970 b; Qayyum et al., 2002; Ahmad et al., 1987; Chaudhri et al., 1979; Karmakar & Bhowmik, 2018; Liang & Ke, 1983; * Moraes et al., 2001.

Characteristics	E. aridophilus	E. alatus	E. bandispermathecae	E. ceylonicus	E. citrifolius	E. dossei *	E. omentum	E. plazo	E. relictus	E. sundarbanensis	E. vulgaris
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j1	31 (29–33)	28	33–35	25–33	28	32	35	31	31	29	33.2
j3	28 (26–29)	21	28–35	18–28	30	30	35	31	29	27	26.3
j4	14 (13–14)	-	13–15	11–12	7	10	15	13	10	9	10.9
j5	14 (13–15)	16	10–15	11–12	8	10	15	13	13	8	11.3
j6	15 (15–17)	-	15–18	12–14	8	11	18	18	16	12	13.9
J2	15 (14–16)	20	18–20	13–15	8	12	20	21	16	10	14.8
J5	7 (6–7)	-	8	4–5	5	6	5	8	8	6	7.5
z2	22 (21–23)	17	18–25	16–21	20	25	28	29	23	19	20.5
z4	23 (21–23)	20	23–30	17–23	21	30	30	26	26	21	18.9
z5	15 (15–17)	-	13–18	10–12	13	10	5	13	13	8	12.5
Z1	18 (18–20)	21	18–20	14–15	13	13	18	16	13	11	13.2
Z4	19 (18–20)	22	18–23	14–17	17	14	20	18	16	17	16.1
Z5	68 (68–70)	63	60–73	50–60	64	75	60	57	55	65	56.5
s4	28 (26–29)	26	33–40	24–31	39	50	23	39	36	34	28.9
S2	21 (20–22)	25	25–28	17–22	19	22	25	23	21	17	18.1
S4	26 (24–26)	28	28–33	19–29	20	24	23	21	21	20	20.0
S5	28 (26–29)	28	33–38	22–30	27	21	33	29	26	24	22.9
r3	15 (15–17)	-	18–20	13–16	11	13	18	16	16	13	14.8
R1	15 (14–16)	-	15–18	12–15	8	11	18	18	16	13	15.0
Position of R1	Off shield	On shield	On shield	On shield	Off shield	Off shield	Off shield	Off shield	Off shield	Off shield	Off shield
Ornamentation	Reticulated	Reticulated	Reticulated	Reticulated	Reticulated	Antero-laterally	Reticulated	Reticulated	Reticulated	Reticulated	Laterally striated,
of dorsal shield						striated					medially reticulated
SgeIV	46 (43–46)	48	45–48	40–46	47	57	40	39	43	37	42.0
StiIV	32 (31–34)	28	35–38	27–35	34	35	35	28	34	43	32.7
StaIV	57 (54–58)	53	53–58	47–52	58	68	63	57	60	62	56.8
Extension of	Up to level of	Between j3	Up to level of seta j3	Between j3	Between j3	Between j3	Up to level	Between j3	Up to level	Between j3 and z2	Between j3 and z2
peritreme	seta j3	and z2		and z2	and z2	and z2	of seta z2	and z2	of seta z2
JV5	37 (35–38)	-	33–40	-	-	-	43	39	34	36	34.4
Tip of leg IV	Blunt, hyaline	Bulbous	Blunt, curved	Blunt, hyaline	Pointed	Knobbed	Pointed	Pointed	Pointed,	Pointed, curved	Pointed
macrosetae									curved
Shape of calyx	Proximally	-	Tubular with	-	-	Trumpet shaped	-	-	Tubular	Elongated,	Sausage-shaped
	wide and		sclerotized bands							fundibular
	narrowed
	gradually
Length of	13 (12–13)	25	15	7–9	-	10–19	15	-	-	18	-
calyx