Debsacarus oribatoides (Habeeb, 1961)

O'Neill, Joseph C., Fisher, J. Ray, Nelson, Whitney A., Skvarla, Micheal J., Fisher, Danielle M. & Dowling, Ashley P. G., 2016, Systematics of testudacarine torrent mites (Acari, Hydrachnidia, Torrenticolidae) with descriptions of 13 new species from North America, ZooKeys 582, pp. 13-110 : 22-25

Taxon classification Animalia Trombidiformes Torrenticolidae

Debsacarus oribatoides (Habeeb, 1961)

Debsacarus oribatoides : Habeeb 1974b: 1; Viets 1987: 222, 724.

Testudacarus oribatoides : Habeeb 1961: 5-6; Lundblad 1967: 418; Habeeb 1967: 4; Habeeb 1969: 2; Viets 1987: 222, 724.

Type series.

Lectotype (1♀): California, USA: 1♀ from Los Angeles County, Coldbrook Guard Station, North Fork of San Gabriel River, 25 June 1961, by H Habeeb, HH610024; Paralectotype (1♂): California, USA: 1♂ from Los Angeles County, Coldbrook Guard Station, North Fork of San Gabriel River, 25 June 1961, by H Habeeb, HH610024.

Other material examined.

Other (10♀, 8♂): California, USA: 1♂ from Monterey County, Salmon Falls Creek, beside Route 1 12.5 km south of Gorda (35°48'56.00"N, 121°21'30.00"W), 2 June 2010, by IM Smith, IMS100045; 5♀ and 3♂ from Monterey County, Los Padres National Forest, Lucia beside Ferguson-Nacimiento Road 5.6 km east of Route 1 (36°0'3.00"N, 121°28'31.00"W), 3 June 2010, by IM Smith, IMS100048; 1♀ and 3♂ from Monterey County, Los Padres National Forest, Lucia beside Nacimiento-Ferguson Road 11.3 km west of Nacimiento Campground (36°1'N, 121°27'W), 30 July 1987, by IM Smith, IMS8700119; 1♀ and 1♂ from Monterey County, Los Padres National Forest, Salmon Creek, beside Route 1 south of Gorda (35°49'N, 121°22'W), 29 July 1987, by IM Smith, IMS870118; 1♀ from Monterey County, Limekiln State Park, Hare Canyon Creek, near campground (36°0'41.00"N, 121°31'1.00"W), 6 September 2013, by JR Fisher, JRF13-0906-001; 1♀ from Monterey County, Salmon Creek, beside Route 1 south of Gorda (35°49'N, 121°22'W), 28 July 1987, by IM Smith, IMS870114A; 1♀ from Los Angeles County, Angeles National Forest, North Fork of San Gabriel River, off Route 39 (34°16'16.00"N, 117°50'46.00"W), 8 September 2013, by JR Fisher, JRF13-0908-001.

Type deposition.

Lectotype (1♀), and paralectotype (1♂) deposited at CNC.

Redescription.

Female (n=11) with characteristics of the genus with following specifications.

Gnathosoma (Fig. 9) - Subcapitulum [260-290 ventral length; 125-145 dorsal length; 73-84 tall] elongate with long rostrum. Chelicerae [195-220 long] noticeably straight with short, almost straight fangs [28-33 long]. Pedipalp [217-234 long] highly modified: lanceolate and with four segments. Trochanter [7-9 long; 38-40 wide] shortened. Femur [39-44 long; 30-34 wide]. Fused genu and tibia [41-47 long; 25-28 wide]. Tarsus [17-20 long; 12-15 wide].

Dorsum (Fig. 10) - [574-741 long; 471-561 wide] round to ovoid. Dorsal plate [465-586 long; 391-451 wide]. Primary sclerotization [436-510 long] grey-blue. Dorso-glandularia-4 [163-194 apart] in line with and lateral to [29-48] muscle scars. Platelets extremely robust and colorless. All three anterior platelets similar in size and noticeably rectangular. Anterio-medial platelet [173-209 long; 74-128 wide] large trapezoid with slightly rounded anterior margin. Anterio-lateral platelet [185-207 long; 97-127 wide] without noticeable bulge or posterior narrowing. Lateral platelets as follows: lateral-1 [38-50 long; 25-38 wide]; lateral-2 [143-172 long; 40-66 wide]; lateral-3 [39-64 long; 16-32 wide]; lateral-4 [107-132 long; 28-51 wide]; lateral-5 [51-78 long; 28-48 wide]; lateral-6 [92-128 long; 25-55 wide]; lateral-7 [49-101 long; 22-50 wide].

Venter (Fig. 10) - [779-929 long; 510-610 wide] round to ovoid and colorless. Primary sclerotization [668-756 long. Gnathosomal bay [33-45 dorsal length; 128-148 ventral length; 33-38 wide] very narrow; dorsal bay length extremely short giving the bay a “covered” appearance and ventral bay base ending anterior to the leg-I insertion. Coxal field [520-567 long; 325-353 wide]. Coxa-I [292-334 long; 160-186 midlength] long and with characteristic secondary growth attached at the anterior tips. Coxa-II + III [137-153 distance to top of coxa-II; 210-237 distance to top of coxa-III; 379-424 distance to bottom of coxa-III; 228-274 total length]. Coxa-IV [355-400 distance to top; 155 -173 total length]. Genital field [362-409 distance to top; 556-601 distance to bottom; 185-208 total length; 155-175 width; 221-274 distance from gnathosomal bay; 59-101 distance from coxa-I; 163-227 distance to excretory pore; 215-366 distance to caudad] large. Eggs [200 long; 1-2 eggs]. Distance to excretory pore [727-809].

Legs - colorless. Total leg and podomere lengths as follows: Leg-I [459-505 total; trochanter 54-62; basifemur 81-91; telofemur 63-68; genu 81-91; tibia 86-100; tarsus 84-95]. Leg-II [516-554 total; trochanter 62-65; basifemur 85-100; telofemur 63-71; genu 84-96; tibia 100-114; tarsus 106-115]. Leg-III [593-644 total; trochanter 63-69; basifemur 97-105; telofemur 70-78; genu 104-118; tibia 125-143; tarsus 130-142]. Leg-IV [779-862 total; trochanter 84-96; basifemur 118-127; telofemur 115-129; genu 141-166; tibia 160-181; tarsus 148-170].

Male (n=9) similar to female except for sexually dimorphic characters previously discussed and with following specifications.

Gnathosoma (Fig. 9) - Subcapitulum [229-266 ventral length; 120-132 dorsal length; 64-78 tall]. Chelicerae [175-200 long]. Fangs [25-26 long]. Pedipalp [206-219 long]. Trochanter [7-9 long; 35-38 wide]. Femur [36-40 long; 30-32 wide]. Fused genu and tibia [43-45 long; width 23-26 wide]. Tarsus [16-17 long; 13-15 wide].

Dorsum (Fig. 11) - [534-590 long; 416-478 wide]. Dorsal plate [421-477 long; 332-380 wide] without secondary sclerotization. Dorso-glandularia-4 [157-188 apart] equally anterior to [25-55] and lateral to [31-53] muscle scars. Anterio-medial platelet [151-200 long; 90-108 wide]. Anterio-lateral platelet [169-186 long; 97-118 wide]. Lateral platelets as follows: lateral-1 [33-46 long; 22-31 wide]; lateral-2 [134-155 long; 48-55 wide]; lateral-3 [29-51 long; 17-24 wide]; lateral-4 [88-113 long; 31-40 wide]; lateral-5 [41-49 long; 22-35 wide]; lateral-6 [82-101 long; 27-42 wide]; lateral-7 [36-59 long; 20-38 wide].

Venter (Fig. 11) - [686-773 long; 449-515 wide]. Primary sclerotization [637-705 long]. Gnathosomal bay [21-36 dorsal length; 118-132 ventral length; 27-42 wide]. Coxal field [474-532 long; 307-332 wide]. Coxa-I [272-294 long; 143-169 midlength]. Coxa-II + III [123-138 distance to top of coxa-II; 192-208 distance to top of coxa-III; 377-417 distance to bottom of coxa-III; 253-279 total length]. Coxa-IV [327-368 length to top; 136-164 total length]. Genital field [388-435 distance to top; 536-598 distance to bottom; 148-165 total length; 126-150 width; 270-307 distance from gnathosomal bay; 108-144 distance from coxa-I; 88-107 distance to excretory pore; 143-179 distance to caudad]. Genital skeleton [210-265 long; 95-115 wide]. Distance to excretory pore [637-705].

Legs - total leg and podomere lengths as follows: Leg-I [447-476 total; trochanter 59-63; basifemur 80-88; telofemur 61-68; genu 79-88; tibia 85-95; tarsus 80-92]. Leg-II [479-526 total; trochanter 54-67; basifemur 82-89; telofemur 60-72; genu 80-90; tibia 94-105; tarsus 105-114]. Leg-III [544-624 total; trochanter 56-66; basifemur 79-102; telofemur 65-74; genu 95-110; tibia 119-138; tarsus 120-137]. Leg-IV [743-857 total; trochanter 85-110; basifemur 107-125; telofemur 113-130; genu 134-160; tibia 152-177; tarsus 145-158].

Diagnosis.

Same as genus.

Distribution.

Same as genus.

Remarks.

Debsacarus oribatoides show at least 15% COI divergence from all other Testudacarinae and less than.6% divergence from one another (Fig. 8). Additionally, Habeeb (1961) describes a protrusible maxillary tube, however, we find no evidence in the additional specimens examined that the maxillary tube or subcapitulum is any more protrusible than what is commonly found in other Testudacarus , and certainly is not protrusible like in Pseudotorrenticola . Habeeb (1961) did not designate types, however, he described the species from the only two specimens available. From those two specimens, we have designated a lectotype (♀) and paralectotype (♂).