Amphialycus (Amphialycus) acaciae,

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: 311-315

publication ID

https://doi.org/10.11646/zootaxa.4858.3.1

publication LSID

lsid:zoobank.org:pub:7BA52F1C-4084-4915-A7D9-8DA99379086B

DOI

http://doi.org/10.5281/zenodo.4412389

persistent identifier

http://treatment.plazi.org/id/AC6C87BA-C46E-EB62-FF1C-6762109FD5EC

treatment provided by

Plazi

scientific name

Amphialycus (Amphialycus) acaciae
status

sp. nov.

Amphialycus (Amphialycus) acaciae  sp. nov.

( Figs. 29–47View FIGURES 29−35View FIGURES 36−42View FIGURES 43−47)

Description. Dorsum ( Figs. 29–31View FIGURES 29−35). Length 480 μm; dorsal setal pattern holotrichous, additional setae of smaller size on ventral side; parallel ridges contiguous on soft integument; sclerotic crista from naso to sensillar area, distance between counterparts of setae vi twice as large than the distance between sensilla ve or setae in, microplates of setae vi inseparably linked to crista, striated naso tapering to blunt end, setae exp very small, sparsely barbed, medial to anterior pair of lateral eye spots.

Venter ( Figs. 32, 33View FIGURES 29−35). Genital valves each with 21–22 genital setae; 8–9 anal setae per valve.

Gnathosoma  ( Figs. 34–36View FIGURES 29−35View FIGURES 36−42). Pair of smooth cheliceral setae almost dorsally, seta placed slightly abaxially as in Fig. 29View FIGURES 29−35; 2View FIGURES 1−5 pairs of adoral setae; four microtrichous palpal eupathids, separate from each other.

Legs ( Figs. 37–42View FIGURES 36−42). Solenidial formula for tarsi, tibiae, genua and femora on legs I, II, III and IV, respectively: 2-1-0-0, 2-2-2-0, 3-2-2-1, 2-0-0-0, solenidion ω2 at the adaxial end of lyrifissure, famuli I and II ventrodistally.

Larva (n=5, Figs. 46, 47View FIGURES 43−47)

Dorsum. Length 180 μm; holotrichous dorsum; sensillae slender.

Venter. Genital valves absent; 4 anal setae per valve.

Gnathosoma  . Subcapitulum with 2 pairs of setae.

Legs. Solenidial formula for tarsi, tibiae, genua and femora on legs I, II and III, respectively: 1-1-0, 2-2-2, 3- 2-2, 1-0-0.

Other life stages:

Protonymph (n=6, Fig. 45View FIGURES 43−47), 1 genital seta per valve.

Deutonymph (n=3, Fig. 44View FIGURES 43−47), 5–7 genital setae per valve.

Tritonymph (n=6, Fig. 43View FIGURES 43−47), 13–14 genital setae per valve.

Adult female (n=6, Figs. 32, 33View FIGURES 29−35), 21–22 genital setae per valve, one pair of eugenital setae.

Type material. Holotype female, 5 paratype females, 6 paratype tritonymphs, 3 paratype deutonymphs, 6 paratype protonymphs and 5 paratype larvae, from Acacia karroo, Potchefstroom, NORTH-WEST  PROVINCE, 6 February to March 1969, P.D. Theron. Deposited at ARC-Plant Health and Protection, Pretoria, South Africa. 

Additional material. 16 females, 12 tritonymphs, 7 protonymphs and 2 larvae from Acacia karroo, Potchefstroom, NORTH-WEST  PROVINCE, 6 February to March 1969, P.D. Theron.

Differential diagnosis. This species can easily be differentiated from another holotrichous species, A. mayteni  , and from the neotrichous species of the genus by having a cone-like, striated naso ( Figs. 30, 31View FIGURES 29−35), two pairs of welldeveloped adoral setae ( Fig. 36View FIGURES 36−42) and solenidial formula.

Etymology. The specific name refers to the previous genus of the dominant tree at the collection site, namely, Acacia  .