Demodex phocidi (Acariformes: Demodecidae) from Phoca vitulina (Carnivora: Phocidae) – the second observation in the world and a supplement to the species description

Figures & Tables

Body region	Number of parasites in the examined skin samples	Mean density/1 cm² of skin
Hairy skin of the head	373	46.6
Regions of the neck	181	45.3
Back and abdomen	580	36.3
Fore-flippers	117	29.3
Hind-flippers	40	10.0
Tail	4	1.0
Total	1295	32.4

Metrical features (micrometers) of Demodex phocidi immatures collected from Phoca vitulina in the Baltic Sea in comparison with the original description

Feature	Present			Desch et al. (2003)
Feature	Larva(n=30)	Protonymph(n=30)	Deutonymph(n=30)	Larva(n=3)	Protonymph(n=4)	Deutonymph(n=9)
Gnathosoma length	12 (10–13), SD 1	12 (11–13), SD 1	14 (13–20), SD 2	14 (13–15)	15 (15–16)	14 (12–15)
Podosoma length	31 (18–44), SD 6	37 (28–48), SD 5	49 (38–58), SD 5	35 (32–37)	40 (37–43)	56 (47–60)
Opisthosoma length	44 (28–55), SD 6	71 (55–100), SD 13	95 (68–118), SD 13	46 (37–59)	89 (84–93)	96 (62–116)
Gnathosoma width	12 (10–16), SD 1	14 (11–20), SD 2	17 (13–23), SD 2	17 (16–18)	17 (15–19)	18 (16–21)
Podosoma width	26 (15–38), SD 5	31 (25–40), SD 4	37 (28–50), SD 5	26 (21–29)	29 (26–35)	35 (29–41)
Opisthosoma width	23 (15–35), SD 4	28 (23–35), SD 4	32 (23–48), SD 5	23 (21–25)	26 (23–31)	30 (24–37)
Opisthosoma length to body length ratio (%)	50 (42–56), SD 3	59 (51–68), SD 4	60 (52–65), SD 3	48^a	62^a	58^a
Body length to width ratio	3.4:1 (2.2–4.6:1),SD 0.6:1	4.0:1 (2.7–5.3:1),SD 0.7:1	4.4:1 (3.3–5.7:1),SD 0.6:1	3.7:1^b	5.0:1^b	2.9:1^b
Total body length	87 (63–110), SD 12	120 (97–148),SD 17	158 (120–191),SD 16	96 (82–109)	144 (135–148)	165 (128–191)

Feature	Present		Desch et al. (2003)
Feature	♂(n=100)	♀(n=100)	♂(n=12)	♀(n=20)
Gnathosoma length	13 (11–15), SD 1	15 (11–18), SD 1	13 (12–13)	15 (15–16)
Podosoma length	47 (40–58), SD 4	55 (43–63), SD 4	43 (40–46)	52 (47–54)
Opisthosoma length	114 (90–138), SD 11	137 (100–175), SD 17	115 (103–134)	117 (104–134)
Gnathosoma width	16 (13–20), SD 2	18 (13–22), SD 2	17 (15–19)	19 (18–22)
Podosoma width	38 (28–50), SD 4	45 (33–53), SD 4	36 (32–40)	45 (40–49)
Opisthosoma width	34 (25–43), SD 4	38 (28–48), SD 4	27 (24–29)	33 (29–38)
Vulva length	–	8 (7–13), SD 1	–	7 (6–7)
Aedeagus length	21 (18–28), SD 2	–	18^a	–
Opisthosoma length to body length ratio (%)	65 (59–70), SD 3	66 (60–71), SD 3	67^b	67^b
Body length to width ratio	4.6:1 (3.4–5.6:1), SD 0.5:1	4.6:1 (3.7–6.2:1), SD 0.5:1	4.8:1^c	3.9:1^c
Total body length	173 (148–202), SD 11	207 (159–249), SD 19	172 (162–193)	174 (169–203)
Egg	59 (50–65), SD 4 x 30 (23–36), SD 3^d		57 (53–60) × 31 (29–32)^e
Egg length to width ratio	2.0:1 (1.7–2.6:1), SD 0.2:1		1.8:1^f