Testudacarus hyporhynchus O'Neill & Dowling

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 : 66-69

Taxon classification Animalia Trombidiformes Torrenticolidae

Testudacarus hyporhynchus O'Neill & Dowling sp. n.

Type series.

Holotype (1♀): California, USA: 1♀ Humboldt County, Willow Creek, Willow Creek Campground off Rt. 299 (40°54'17.00"N, 123°42'21.00"W), 14 June 2010, by IM Smith, IMS100065 (Specimen 146762 - DNA#2177); Paratype (1♀, 2♂): California, USA: (allotype) 1♂ Humboldt County, Willow Creek, Willow Creek Campground off Rt. 299 (40°54'17.00"N, 123°42'21.00"W), 14 June 2010, by IM Smith, IMS100065 (Specimen 146763 - DNA#2178); 1♂ Humboldt County, Willow Creek, Willow Creek Campground off Rt. 299 (40°54'17.00"N, 123°42'21.00"W), 14 June 2010, by IM Smith, IMS100065; Oregon, USA: 1♀ from Curry County, Port Orford, beside Elk River Road 9.0 km east of Elk River Fish Hatchery (42°42'22.00"N, 124°20'28.00"W), 22 June 2010, by IM Smith, IMS100080.

Type deposition.

Holotype (1♀) and allotype (1♂) deposited at CNC; two paratypes (1♀, 1♂) at ACUA.

Diagnosis.

These mites differ from the rest of the complex in having a dorsally “covered” gnathosomal bay (short doral gnathosomal bay length) and an elongate gnathosoma with a long rostrum that exteneds below the gnathosoma ventral surface.

Description.

Female (n=2) with characteristics of genus with following specifications.

Gnathosoma (Fig. 36) - Subcapitulum [244-250 ventral length; 150-155 dorsal length; 89-97 tall] elongate with long rostrum extending below ventral surface; colorless. Chelicerae [210-220 long] unmodified with lightly curved fangs [32-36 long]. Pedipalp [194-203 long] unmodified. Trochanter [24-25 long; 38-40 wide]. Femur [53-56 long; 42-43 wide]. Genu [44-45 long; 34-35 wide]. Tibia [50-54 long; 22-23 wide]. Tarsus [21-22 long; 9-10 wide].

Dorsum (Fig. 37) - [768-849 long; 634-668 wide] round to ovoid and mostly colorless. Dorsal plate [570-578 long; 645-693 wide]. Primary sclerotization [540-583 long] colorless to light pink. Dorso-glandularia-4 [230-252 apart] lateral to [44-61] and just anterior to [0-27] muscle scars. Platelets colorless. Anterio-medial platelet [230-252 long; 103-116 wide]. Anterio-lateral platelets [229-246 long; 117-123 wide]. Lateral platelets as follows: lateral-1 [66-83 long; 56-59 wide]; lateral-2 [156-188 long; 47-51 wide]; lateral-3 [60-84 long; 29-30 wide]; lateral-4 [139-150 long; 35-45 wide]; lateral-5 [79-93 long; 41-42 wide]; lateral-6 [129-144 long; 39-44 wide]; lateral-7 [76-88 long; 35-41 wide].

Venter (Fig. 37) - [1001-1049 long; 700-728 wide] round to ovoid and colorless. Primary sclerotization [814-824 long]. Gnathosomal bay [14-20 dorsal length; 101-102 ventral length; 67-70 wide] short dorsally giving a “covered” appearance and ventrally ending anterior to leg-I insertion. Coxal field [590-616 long; 404-433 wide]. Coxa-I [298-316 long; 196-216 midlength]. Coxa-II + III [127-143 distance to top of coxa-II; 216-264 distance to top of coxa-III; 427-446 distance to bottom of coxa-III; 299-303 total length]. Coxa-IV [399-434 distance to top; 182-191 total length]. Genital field [410-424 distance to top; 627-642 distance to bottom; 217-218 total length; 174-189 width; 308-323 distance from gnathosomal bay; 108-112 distance from coxa-I; 252-270 distance to excretory pore; 374-407 distance to caudad] large. Distance to excretory pore [879-912].

Legs - colorless. Total leg and podomere lengths as follows: Leg-I [566-594 total; trochanter 68-74; basifemur 104-106; telofemur 81-85; genu 108-112; tibia 109-117; tarsus 95-102]. Leg-II [614-645 total; trochanter 75-78; basifemur 102-108; telofemur 77-79; genu 111-116; tibia 124-130; tarsus 125-135]. Leg-III [714-753 total; trochanter 74-79; basifemur 109-119; telofemur 88-94; genu 136-139; tibia 154-160; tarsus 152-161]. Leg-IV [952-961 total; trochanter 105-109; basifemur 142-144; telofemur 138-139; genu 191-192; tibia 199-201; tarsus 175-178].

Male (n=2) similar to female except for sexually dimorphic characters previously discussed and with following specifications.

Gnathosoma (Fig. 36) - Subcapitulum [222-239 ventral length; 136-151 dorsal length; 85-89 tall]. Chelicerae [203-218 long]. Fangs [33-34 long]. Pedipalp [195-200 long]. Trochanter [24-25 long; 36-38 wide]. Femur [55-58 long; 42-46 wide]. Genu [45-46 long; width 34-35 wide]. Tibia [50-54 long; 21-23 wide]. Tarsus [17-20 long; 8-9 wide].

Dorsum (Fig. 38) - [667-712 long; 548-582 wide]. Dorsal plate [546-616 long; 470-471 wide]. Dorso-glandularia-4 [192-212 apart] lateral to and well anterior to muscle scars [65-67 anterior to; 40-55 lateral to]. Anterio-medial platelet [244-249 long; 91-100 wide]. Anterio-lateral platelets [225-229 long; 111-116 wide]. Lateral platelets as follows: lateral-1 [49-61 long; 43-60 wide]; lateral-2 [135-152 long; 47-50 wide]; lateral-3 [53-60 long; 24-25 wide]; lateral-4 [135-144 long; 37-41 wide]; lateral-5 [60-75 long; 35-37 wide]; lateral-6 [101-105 long; 32-37 wide]; lateral-7 [59-63 long; 31-33 wide].

Venter (Fig. 38) - [835-898 long; 625-626 wide]. Primary sclerotization [750-791 long]. Gnathosomal bay [16-20 dorsal length; 99-101 ventral length; 67-68 wide]. Coxal field [553-576 long; 403-408 wide]. Coxa-I [296-318 long; 195-218 midlength]. Coxa-II + III [116-127 distance to top of coxa-II; 212-234 distance to top of coxa-III; 430-473 distance to bottom of coxa-III; 314-346 total length]. Coxa-IV [377-413 length to top; 163-176 total length]. Genital field [473-506 distance to top; 636-681 distance to bottom; 163-175 total length; 149-151 width; 372-407 distance from gnathosomal bay; 177-188 distance from coxa-I; 129-134 distance to excretory pore; 200-217 distance to caudad]. Genital skeleton [180-187 long; 117-122 wide]. Distance to excretory pore [765-815].

Legs - total leg and podomere lengths as follows: Leg-I [593-606 total; trochanter 73-79; basifemur 111-114; telofemur 78-83; genu 107-111; tibia 113-118; tarsus 105-106]. Leg-II [635-645 total; trochanter 74-79; basifemur 102-104; telofemur 84-85; genu 115-120; tibia 129-132; tarsus 124-130]. Leg-III [724-726 total; trochanter 77-78; basifemur 109-116; telofemur 87-91; genu 136-137; tibia 155-156; tarsus 152-155]. Leg-IV [905-964 total; trochanter 107-118; basifemur 139-140; telofemur 129-142; genu 183-191; tibia 179-198; tarsus 167-176].

Etymology.

Specific epithet hyporhynchus (hypo-, G. under; rhynchus, G. snout) refers to the long rostrum that extends below the ventral surface of the gnathosoma.

Distribution.

Humbolt County, California and Curry County, Oregon.