Torrenticola ivyae Fisher & Dowling

Fisher, J. Ray, Fisher, Danielle M., Skvarla, Michael J., Nelson, Whitney A. & Dowling, Ashley P. G., 2017, Revision of torrent mites (Parasitengona, Torrenticolidae, Torrenticola) of the United States and Canada: 90 descriptions, molecular phylogenetics, and a key to species, ZooKeys 701, pp. 1-496 : 1

Torrenticola ivyae Fisher & Dowling sp. n.

Material examined.

HOLOTYPE (♀): from USA, Florida, Polk County, beside Rt. 471 at junction of Pasco, Polk and Sumter County lines, (28°19'19"N, 82°4'4"W), 24 April 1992, by IM Smith, IMS920003

PARATYPES (5 ♀; 5 ♂): Florida, USA: 2 ♀ from Hillsborough County, beside Rt. 41/301 near Hillsborough River State Park, south of Zephyrhills, (28°10'10"N, 82°12'12"W), 24 April 1992, by IM Smith, IMS920001 • 2 ♀ and 3 ♂ from Pasco County, beside Rt. 39 just north of Crystal Springs, (28°11'11"N, 82°10'10"W), 27 April 1992, by IM Smith, IMS920011 • 1 ♂ (ALLOTYPE) from Polk County, beside Rt. 471 at junction of Pasco, Polk and Sumter County lines, (28°19'19"N, 82°4'4"W), 24 April 1992, by IM Smith, IMS920003 • 1 ♀ and 1 ♂ from Polk County, beside Rucks Dairy Road 1.3 km south of Lake Arbuckle Road, (27°42'42"N, 81°26'26"W), 25 April 1992, by IM Smith, IMS920004

Type deposition.

Holotype (♀), allotype (♂), and some paratypes (3 ♀; 2 ♂) deposited in the CNC; other paratypes (2 ♀; 2 ♂) deposited in the ACUA.

Diagnosis.

Torrenticola ivyae are similar to other members of the Raptor Group ( T. gnoma , T. irapalpa , T. longitibia , T. mjolniri , T. elusiva , T. racupalpa , T. raptor , T. danielleae , and T. daemon ) in having round bodies; Dgl-4 close to muscles scars; long, thin subcapitular rostra; and long, thin pedipalp tibiae. T. ivyae can be differentiated from T. gnoma , T. elusiva , T. danielleae , and T. daemon by having a more elongate rostrum (length/width ♀ = 4.00-4.15 in T. ivyae , 2.74-3.75 in others; ♂ = 3.85-4.08 in T. ivyae , 2.56-3.57 in others) and more elongate pedipalpal tibiae (length/width ♀ = 5.07-5.64 in T. ivyae , 4.05-5.00 in others, ♂ = 4.75-5.20 in T. ivyae , 3.88-4.44 in others). T. ivyae can be differentiated from T. irapalpa , T. raptor , T. danielleae , and T. daemon by having Dgl-4 closer to the muscle scars (dorsum width/distance between Dgl-4 = 2.20-2.75 in T. ivyae , 1.42-2.09 in others). T. ivyae can be differentiated from T. longitibia (known only from males) by femur/genu (1.83-1.88 in T. ivyae , 2.1-2.17 in T. longitibia ) and having less elongate tibiae (length/width = 4.75-5.20 in T. ivyae , 5.50-5.50 in T. longitibia ). Female T. ivyae can be differentiated from female T. racupalpa by having a more elongate rostrum (length/width = 4.00-4.15 in T. ivyae , 3.56-3.82 in T. racupalpa ) and more elongate pedipalpal tibiae (length/width = 5.07-5.64 in T. ivyae , 4.44-5.00 in T. racupalpa ). Male T. ivyae can be differentiated from male T. racupalpa by having a longer anterior venter (♂ 220-230 in T. ivyae , 200-205 in T. racupalpa ) and a shorter genital field (♂ 142-148 in T. ivyae , 160-165 in T. racupalpa ). Female T. ivyae can be differentiated from female T. mjolniri by having a smaller dorsum (length ♀ = 550-590 in T. ivyae , 605-640 in T. mjolniri ; width ♀ = 460-500 in T. ivyae , 510-545 in T. mjolniri ) and a shorter anterior venter (♀ 155-170 in T. ivyae , 180-195 in T. mjolniri ). Male T. ivyae can be differentiated from male T. mjolniri by having a less elongate subcapitulum (ventral length/width = 2.57-2.75 in T. ivyae , 2.82-3.00 in T. mjolniri ). Additionally, T. ivyae can be differentiated from T. mjolniri by being found in Florida ( T. ivyae is known from the northeast).

Description.

Female (Figure 106) (n = 5) (holotype measurements in parentheses when available) with characters of the genus with following specifications.

Dorsum - (550-590 (580) long; 460-500 (495) wide) circular with reddish-purple coloration anteriorly and posteriorly connected medially. Anterio-medial platelets (120-135 (120) long; 60-62.5 (62.5) wide). Anterio-lateral platelets (165-180 (165) long; 65-75 (75) wide) free from dorsal plate. Dgl-4 much closer to the muscle scars than to the edge of the dorsum (distance between Dgl-4 180-195 (180)). Dorsal plate proportions: dorsum length/width 1.16-1.20 (1.17); dorsal width/distance between Dgl-4 2.42-2.75 (2.75); anterio-medial platelet length/width 1.92-2.25 (1.92); anterio-lateral platelet length/width 2.20-2.62 (2.20); anterio-lateral/anterio-medial length 1.26-1.38 (1.38).

Gnathosoma - Subcapitulum (300-325 (325) long (ventral); 232.5-257.5 (247.5) long (dorsal); 115-127.5 (120) tall) colorless. Rostrum (130-145 (145) long; 32.5-35 (35) wide) elongate. Chelicerae (315-340 (335) long) with curved fangs (55-60 (60) long). Subcapitular proportions: ventral length/height 2.55-2.71 (2.71); rostrum length/width 4.00-4.15 (4.14). Pedipalps elongate with tuberculate ventral extensions on femora and genua. Palpomeres: trochanter (42.5-46.25 (45) long); femur (117.5-125 (125) long); genu (65-67.5 (65) long); tibia (91.25-100 (95) long; 17.5-18.75 (18.75) wide); tarsus (15-17.5 (17.5) long). Palpomere proportions: femur/genu 1.81-1.92 (1.92); tibia/femur 0.76-0.83 (0.76); tibia length/width 5.07-5.64 (5.07).

Venter - (630-755 (750) long; 490-540 (540) wide) with reddish-purple coloration. Gnathosomal bay (150-175 (165) long; 67.5-75 (72.5) wide). Cxgl-4 far from apex. Medial suture (25-25 (25) long). Genital plates (150-165 (157.5) long; 142.5-150 (150) wide). Additional measurements: Cx-1 (280-300 (300) long (total); 120-145 (145) long (medial)); Cx-3 (320-335 (325) wide); anterior venter (155-170 (170) long). Ventral proportions: gnathosomal bay length/width 2.00-2.44 (2.28); anterior venter/genital field length 0.94-1.13 (1.08); anterior venter length/genital field width 1.03-1.19 (1.13); anterior venter/medial suture 6.20-6.80 (6.80).

Male (Figure 107) (n = 4) (allotypic measurements in parentheses when available) with characters of the genus with following specifications.

Dorsum - (530-550 (550) long; 390-450 (420) wide) circular with reddish-purple coloration anteriorly and posteriorly connected medially. Anterio-medial platelets (125-135 (130) long; 55-62.5 (57.5) wide). Anterio-lateral platelets (160-190 (160) long; 60-75 (60) wide) free from dorsal plate. Dgl-4 much closer to the muscle scars than to the edge of the dorsum (distance between Dgl-4 165-205 (180)). Dorsal plate proportions: dorsum length/width 1.19-1.36 (1.31); dorsal width/distance between Dgl-4 2.20-2.39 (2.33); anterio-medial platelet length/width 2.00-2.45 (2.26); anterio-lateral platelet length/width 2.27-2.92 (2.67); anterio-lateral/anterio-medial length 1.23-1.46 (1.23).

Gnathosoma - Subcapitulum (295-302.5 (300) long (ventral); 220-230 (220) long (dorsal); 110-115 (110) tall) colorless. Rostrum (125-132.5 (130) long; 32.5-32.5 (32.5) wide) elongate. Chelicerae (295-305 (295) long) with curved fangs (45-50 (50) long). Subcapitular proportions: ventral length/height 2.57-2.75 (2.73); rostrum length/width 3.85-4.08 (4.00). Pedipalps elongate with tuberculate ventral extensions on femora and genua. Palpomeres: trochanter (40-42.5 (40) long); femur (110-112.5 (110) long); genu (60-60 (60) long); tibia (90-97.5 (90) long; 17.5-20 (17.5) wide); tarsus (15-16.25 (16.25) long). Palpomere proportions: femur/genu 1.83-1.88 (1.83); tibia/femur 0.82-0.87 (0.82); tibia length/width 4.75-5.20 (5.14).

Venter - (625-700 (700) long; 470-500 (470) wide) with reddish-purple coloration. Gnathosomal bay (140-150 (142.5) long; 62.5-72.5 (65) wide). Cxgl-4 far from apex. Medial suture (60-80 (75) long). Genital plates (142.5-147.5 (145) long; 112.5-125 (120) wide). Additional measurements: Cx-1 (280-290 (280) long (total); 125-145 (145) long (medial)); Cx-3 (310-330 (310) wide); anterior venter (220-230 (230) long). Ventral proportions: gnathosomal bay length/width 1.93-2.36 (2.19); anterior venter/genital field length 1.52-1.59 (1.59); anterior venter length/genital field width 1.76-2.00 (1.92); anterior venter/medial suture 2.75-3.67 (3.07).

Immatures unknown.

Etymology.

Specific epithet ( ivyae ) named in honor of Ivy Fisher, our (JRF and DMF) beautiful daughter, who was born in Florida, the type locality.

Distribution.

Florida (Figure 105).

Remarks.

Unfortunately, we were unable to acquire fresh material of Torrenticola ivyae and therefore this species is not included in our phylogenetic analyses. However, we were able to examine morphology with material preserved in GAW. The overall similarity, elongate subcapitular rostra, elongate pedipalpal tibiae, and Dgl-4 close to the muscle scars, are consistent with placing this species in the Raptor Complex and Raptor Identification Group.