Anomalohalacarus Newell, 1949

Durucan, Furkan, 2024, Psammobiont halacarid mites (Acari: Halacaridae) from Türkiye: description of two new species of the genus Atelopsalis Trouessart, 1896 and Scaptognathus Trouessart, 1889 and two new records, Zootaxa 5536 (2), pp. 261-276 : 265-267

Genus Anomalohalacarus Newell, 1949

Anomalohalacarus anomalus ( Trouessart, 1894)

Anomalohalacarus mollis — Durucan and Boyaci, 2018

Figures 3A–K

[ Halacarus anomalus Monniot, 1967: 89–94 , Fig 1 ]

Material examined. Female ( FDHAL-24/82 ), undissected and mounted into one slide, St. 2 (Örnekköy, Antalya), well sorted fine size sand, 3 m depth, 36.846944, 30.805000, June 2016. Male ( FDHAL-24/83 ), undissected and mounted into one slide, same collection data as for previous spec.

Description. Idiosoma very slender ( Figs. 3A, B ) 387 long, 190 wide. Membraneous integument faintly striated ( Fig. 3C ). AD and PD separated by interval of approximately twice the length of AD. AD shorter than PD. Length of AD 107 long, 47 wide with a pair of gland pores in lateral margin and pair of ds-1 (62 long) inserted on AD and posterior to gland pores. Ds-2 to ds-5 inserted on integument. Ds-6 on posterior part of PD. PD divided with pair of pores in anterior of plate and 80 long and 32 wide. AE divided by striated integument into right and left half. Length of AE 75. Each half with three setae and epimeral pore. Long apodemes between epimera I and II. Each plate with one dorsal and two ventral setae. Female genitoanal plate divided into three platelets, with two pairs of pgs on genital plates and one pair within striated integument ( Fig. 3G ). Male genitoanal plate non-divided platelets with 22 pgs surrounded GO and three pairs of sgs. Spermatopositor 57 long, extending beyond anterior margin of GA. Anterior margin of GA rounded ( Fig. 3D ). Gnathosoma 135 long and 55 wide ( Fig. 3E ). Palps are four-segmented. Total palp length 112. Rostrum shorter than gnathosomal base. P2 with long, slender distal seta. P3 with one medial spine seta. P4 with three setae in basal whorl. Chelicerae 138 long ( Fig. 3F ). Leg I ( Fig. 3H ) longer and wider than the other legs. Leg chaetotaxy (from trochanter to tarsus) ( Figs. 3H–K ) (bipectinate and spine setae between parentheses): leg I: 1, 2(1), 4, 5(2), 9(2), 9; leg II: 1, 2, 4(1), 4(2), 5(2), 6?; leg III: 1, 2(1), 2, 3(1), 5(2), 5; leg IV: 0, 1, 2(1), 3(1), 4(2), 5(1). Bipectinate setae conspicuous on tibia II but those setae thick on tibia III and IV. Dorsal setae of basifemur I, III and IV long and stout. Tibia I has one spiniform seta. Tarsus I with four dorsal and four ventral setae, a dorsolateral solenidion. Fossa lamella developed on tarsus I. Tarsus II with three dorsal setae, one solenidion, one pas. Tarsi III and IV each with four dorsal setae single pas. Lateral claws with accessory processes but combs not developed. All tarsi with unidentate median claws. Paired claws on tarsus I smaller than those on following tarsi.

Remarks. Abé (1992) ’s careful re-examinations of A. anomalus , including original materials, allowed him improving the species diagnosis. It includes the following characters: AE with three setae, PE with four setae, P-2 with two setae, male pgs 22, two ventral setae in the middle of tarsus I, one ventral seta on tarsus II, four dorsal setae on tarsus III and IV, number of bipectinate setae on telofemur (I–IV): 0, 1, 0, 1; on genu (I–IV): 2, 2, 1, 1 and tibia (I–IV): 1, 2, 2, 2, respectively.

Individuals belonging to this species have been formerly identified by the author as Anomalohalacarus mollis Morselli & Mari, 1982 ( Durucan and Boyaci, 2018). But, after careful re-examination of the same specimens under x100 objective, the author correct its identification as A. anomalus and re-describe it. The morphological characteristics and habitat preferences of the specimens reported here accord with the previous descriptions given by Abé (1992).

Figures

FIGURE 1. Map showing collecting localities for halacarid mite species in Antalya, Türkiye (Map-Source: Ocean Data View).

FIGURE 3. Anomalohalacarus anomalus (Trouessart, 1894): Line art illustrations of female (G) (FDHAL-24/82) and male (A– F; H–K) (FDHAL-24/83) A Idiosoma, dorsal view B Idiosoma, ventral view C Integument between pairs of ds-3 D Genitoanal plate E Gnathosoma, ventral view F Chelicera, lateral view G Genitoanal plate H Leg I, lateral view I Leg II, ventral view J Leg III, medial view K Leg IV, medial view. Scale bars: A, B=100 µm; C, G=50 µm; D, F=50 µm; E, H–K=50 µm.