Amphialycus (A.) mayteni, Uusitalo & Ueckermann & Theron, 2020

Uusitalo, Matti, Ueckermann, Edward A. & Theron, Pieter D., 2020, A review of the family Alycidae (Acari, Acariformes) from South Africa, Zootaxa 4858 (3), pp. 301-340 : 318-321

Amphialycus (A.) mayteni sp. nov.

( Figs. 63–75 )

Description. Dorsum ( Figs. 63–65 ). Length 320–400 μm; holotrichous dorsum, additional setae on ventral setae, short parallel ridges on soft integument; sclerotic crista from naso to sensillar area, setae vi on prodorsal shield, striated naso very small, setae exp very small, sparsely barbed, medial to anterior pair of lateral eye spots.

Venter ( Figs. 66–72 ). Genital valves each with 21 genital setae; 6 anal setae per valve.

Gnathosoma ( Figs. 68–71 ). Cheliceral setae absent; rutella with distal lobes, 1 pair of adoral setae; 4 microtrichous palpal eupathids.

Legs. Solenidial formula for tarsi, tibiae, genua and femora on legs I, II, III and IV, respectively: 2-1-0-0, 2-2-

2-0, 4-2-2-1, 2-0-0-0.

Life stages:

Protonymph (n=1, Fig. 75 ), 1 genital seta per valve.

Tritonymph (n=3, Fig. 74 ), 15 genital setae per valve, 2 pairs of eugenital setae, for probable tritonymphal sexual dimorphism, see Kethley (1991).

Adult male (n=2, Figs. 66, 67 ), 17–24 genital setae per valve, 10 pairs of eugenital setae.

Adult female (n=4, Fig. 72 ), 17–24 genital setae per setae, 1 pair of eugenital setae.

Type material. Holotype male, 1 paratype male, 4 paratype females, 3 paratype tritonymphs and 1 paratype protonymph from Maytenus cymosa , vicinity of Potchefstroom, NORTH-WEST PROVINCE, 13 April 1972, J.A. Huyssteen. Deposited at ARC-Plant Health and Protection, Pretoria, South Africa.

Differential diagnosis. This species can be differentiated from another holotrichous species, A. acaciae , and from the neotrichous species of the genus by lacking cheliceral setae ( Fig. 68 ), by having a very small (reduced) naso ( Fig. 63 ), only one pair of well-developed adoral setae ( Fig. 69 ) and the solenidial formula.

Etymology. The specific name refers to the genus of the dominant tree of the collection site, Maytenus .

Figures

FIGURES 63−67. Amphialycus (Amphialycus) mayteni sp. nov. 63—Prodorsum, sclerotized crista, reduced naso, distance between counterparts of setae vi and sensilla ve subequal; 64—Nasal area in lateral view; 65—Dorsal habitus, holotrichy; 66—Ventral habitus, neotrichy, 17–20 genital setae per valve, 6 anal setae per valve; 67—Genital valve of male, 21 genital setae, 10 (pairs of) eugenital setae.

FIGURES 68−75. Amphialycus (Amphialycus) mayteni sp. nov. 68—Chelicera, robust, elongated, without cheliceral setae; 69—Subcapitulum, rutella with broad shaft, ventrodistal lobes,1 pair of adorals; 70—Rutellum, without apical point; 71—Palp, tarsus with 4 barbed eupathids in 2 groups; 72—Genital valve of female, 24 genital setae, 1 (pair of) eugenital setae; 73—2 slightly bent claws and densely setulated, claw-like empodium; 74—Probably a male tritonymph, genital valve, 15 genital setae per valve, 4 eugenitals, see Kethley (1991); 75—Protonymph, venter, 1 genital seta per valve. 63−75 from RSA, near Potchef- stroom.