Ixodes guglielmonei D. Apanaskevich, 2022
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publication ID |
https://doi.org/ 10.11646/zootaxa.5173.1.1 |
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publication LSID |
lsid:zoobank.org:pub:8E7CD3D5-92CF-4382-8ECB-DD69EBE9DE62 |
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DOI |
https://doi.org/10.5281/zenodo.6974967 |
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persistent identifier |
https://treatment.plazi.org/id/0F85FCF8-5487-447F-AE84-2A8695748722 |
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taxon LSID |
lsid:zoobank.org:act:0F85FCF8-5487-447F-AE84-2A8695748722 |
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treatment provided by |
Plazi |
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scientific name |
Ixodes guglielmonei D. Apanaskevich |
| status |
sp. nov. |
Ixodes guglielmonei D. Apanaskevich n. sp.
Type-host: Rufous-chested plover— Charadrius modestus Lichtenstein ( Charadriiformes : Charadriidae ).
Other hosts: Bar-winged cinclodes— Cinclodes fuscus (Vieillot) ( Passeriformes : Furnariidae ), striated caracara— Phalcoboenus australis (Gmelin) ( Falconiformes : Falconidae ).
Type-locality: Chile: Antártica Chilena: Isla Navarino, Puerto Williams.
Other localities: Argentina: Tierra del Fuego: Isla de los Estados, Bahia Crossley.
Type-material: Holotype female, from C. modestus, Puerto Williams (~ 54°55’S, 67°37’W), Isla Navarino , Antártica Chilena, Chile, 24.i.1964, G. E. Watson ( GEW); deposited in the USNTC ( USNMENT 00987164 ) GoogleMaps . Paratypes: Chile: Antártica Chilena : Isla Navarino (~ 55°4’S, 67°40’W): 1 female and 2 nymphs, from C. fuscus , 19.i.1964, GEW, USNMENT 00987148 GoogleMaps . All paratypes are deposited in the USNTC .
Other material: 1 female, 9 nymphs and 42 larvae. Argentina: Tierra del Fuego: Isla de los Estados, Bahia Crossley (~ 54°47’S, 64°41’W) GoogleMaps : 1 female and 3 larvae, from P. australis , 26.iv.1971, USNMENT 00987191 ; same locality: 1 nymph and GoogleMaps 33 larvae, from P. australis , 26.iv.1971, USNMENT 00987158 ; Isla Observatorio (~ 54°38’S, 64°7’W): 6 nymphs and GoogleMaps 2 larvae, from P. australis , 17.v.1971, USNMENT 00987163 ; same locality: 2 nymphs and GoogleMaps 4 larvae, from P. australis , 17.v.1971, USNMENT 00987155 . All specimens are deposited in the USNTC .
ZooBank registration: The Life Science Identifier (LSID) for Ixodes guglielmonei n. sp. is urn:lsid:zoobank.org:act:0F85FCF8-5487-447F-AE84-2A8695748722 .
Etymology: The species is named after Alberto Alejandro Guglielmone, an Argentinian expert on ticks and colleague who has contributed much to our knowledge on the systematics, distribution and ecology of ticks, particularly those of the Neotropical Region.
Description. Female [Based on 3 specimens; Figs. 19 View FIGURE 19 , 20 View FIGURE 20 .] Idiosoma ( Fig. 19A, F View FIGURE 19 ) of least of largely engorged females broadly suboval, widest in posterior half. Scutum ( Fig. 19B, C View FIGURE 19 ) length 1.50–1.64 (1.55; n = 3), width 1.16–1.30 (1.25; n = 3), ratio 1.17–1.31 (1.25; n = 3); lateral margins diverging for approximately 1/2 of scutal length, then converging to broadly rounded posterior margin and give diamond shape to scutum; lateral carinae absent; cervical grooves shallow reaching posterior quarter of scutal length; relatively sparse very fine punctations evenly distributed throughout scutum; surface varies from smooth or with very slight rugosity (Chilean specimens) to wrinkled on lateral and central fields (Argentinian specimen); setae ( Fig. 19B, C View FIGURE 19 ) relatively sparse, very short (c. 0.04–0.05 in anterolateral margin of scutum). Alloscutum ( Fig. 19A View FIGURE 19 ) as illustrated; setae ( Fig. 19A, D, E View FIGURE 19 ) numerous, evenly distributed, long in center of alloscutum: c. 0.08–0.11 (avg. 0.10) and in area medial to marginal grooves: c.0.09–0.12 (avg. 0.10), setae in area medial to marginal grooves 1.08–1.10 (avg. 1.09) times longer than setae in center of alloscutum; ratio scutal length to length of setae in area medial to marginal grooves 12.76–16.45 (15.16; n = 3). Venter ( Fig. 19F View FIGURE 19 ) as illustrated; genital aperture ( Fig. 19F View FIGURE 19 ) medial to coxae III; genital groove ( Fig. 19F View FIGURE 19 ) well developed; anal groove ( Fig. 19F View FIGURE 19 ) oval with open posterior margin; ventral setae ( Fig. 19F View FIGURE 19 ) numerous, length of preanal setae c. 0.07, evenly distributed. Spiracular plates ( Fig. 20A View FIGURE 20 ) length 0.32–0.36 (0.34; n = 3), width 0.34–0.38 (0.36; n = 3), ratio 0.87–0.98 (0.93; n = 3); broadly suboval to subcircular.
Gnathosoma ( Fig. 20B–D View FIGURE 20 ) length from palpal apices to cornual apices dorsally 0.75–0.80 (0.78; n = 2), width of basis capituli dorsally 0.55–0.65 (0.60; n = 2), ratio 1.23–1.36 (1.30; n = 2). Dorsal basis capituli ( Fig. 20B View FIGURE 20 ) length from medial insertion of palpal segment I to cornual apices 0.25–0.28 (0.26; n = 2), ratio width to length 2.20–2.36 (2.28; n = 2), subrectangular: lateral margins slightly convex, without lateral projections, posterior margin slightly sinuously concave; cornua short, length 0.05–0.06 (0.05; n = 2), ratio total length of basis capituli, including cornua, to cornual length 4.89–5.00 (4.94; n = 2), triangular with broadly rounded apex; transversally suboval porose areas large, width 0.19–0.23 (0.21; n = 2), ratio basis capituli width dorsally to porose area width 2.89–2.93 (2.91; n = 2), clearly distinct, indented, separated by distance of approximately2–3.5times narrower than their own width, openings discrete. Ventral basis capituli ( Fig. 20C, D View FIGURE 20 ) pentagonal; auriculae short, length 0.03 (n = 2), ratio gnathosoma length to auriculae length 26.89–29.41 (28.15; n = 2), broad, nearly as long as wide, diverging to broadly rounded apex. Lateral surface of basis capituli concave ( Fig. 20C, D View FIGURE 20 ). Palpi ( Fig. 20B, C, E View FIGURE 20 ) moderately long, length dorsally (segments II and III) 0.41–0.45 (0.43; n = 2), maximum width (in dorsolateral plane) 0.19–0.21 (0.20; n = 2), ratio 2.12–2.20 (2.16; n = 2), length of medial margin of palpal segment I ventrally 0.11 (n = 2); segment I with relatively short internal projection directed anteriorly and giving L-shape to segment I dorsally and ventrally; length of internal projection ventrally from base of palpal segment II to anterior apex 0.09 (n = 2), ratio combined length of palpal segments II and III to length of internal projection on palpal segment I ventrally 4.58–5.29 (4.94; n = 2); dorsally segment I without distinct mesodorsal spur, with small blunt dorsoapical denticle; segments II and III fused with indistinct or barely discernible (mostly medially) suture between them, narrow proximally and gradually widening to broadly rounded apex. Hypostome ( Fig. 20C View FIGURE 20 ) length 0.44–0.46 (0.45; n = 2), width 0.17–0.18 (0.17; n = 2), ratio 2.57–2.60 (2.59; n = 2); base of hypostome nearly at same level as base of palpal segments II, club-shaped, widest close to mid-length; dental formula mostly 4/4, proximal rows 2/2 and then 3/3, distal rows 5/5; denticles sharply pointed; proximal part of hypostome without denticles very short.
Legs moderately long, slender. Coxae ( Fig. 20F, G View FIGURE 20 ): coxae I-III with internal and external spurs, coxa IV with external spur only; external spur on coxae I-IV moderately long, subequal in length, moderately narrow, narrowly rounded at apex, directed slightly posteromedially (external spur shorter, broader in Argentinian specimen); internal spur on coxae I-III very short, often poorly distinct, broad, broadly rounded at apex, directed slightly posteromedially or posteriorly; internal spur on coxa I considerably shorter than external spur; no syncoxae. Distally trochanters I-IV ( Fig. 20F, G View FIGURE 20 ) with moderate ventral spur with narrowly rounded apex. Tarsus I length 1.06–1.17 (1.12; n = 3); tarsus IV length 0.94–1.08 (0.99; n = 3).
Nymph [Based on 11 specimens; Figs. 21 View FIGURE 21 , 22 View FIGURE 22 .] Idiosoma ( Fig. 21C View FIGURE 21 ): broadly suboval, widest close to midlength. Scutum ( Fig. 21A View FIGURE 21 ) length 672–782 (739 ± 31; n = 11), width 604–697 (652 ± 32; n = 11), ratio 1.04–1.22 (1.13 ± 0.06; n = 11); lateral margins diverging for approximately half of scutal length, then converging to broadly rounded posterior margin; posterolateral margins nearly straight; lateral carinae lacking; cervical grooves shallow; setae ( Fig. 21A View FIGURE 21 ) relatively sparse, short: length in posterocentral field of scutum 17–30 (23 ± 4; n = 6), shorter than those on alloscutum, distributed as figured. Alloscutum ( Fig. 21B View FIGURE 21 ) as illustrated; setae ( Fig. 21B View FIGURE 21 ) numerous, evenly distributed, long in center of alloscutum: 60–72 (62 ± 5; n = 11) and in area medial to marginal grooves: 68–77 (73 ± 4; n = 11), setae in area medial to marginal grooves 1.06–1.29 (1.17 ± 0.07; n = 11) times longer than setae in center of alloscutum; ratio scutal length to length of setae in area medial to marginal grooves 9.44–11.50 (10.22 ± 0.71; n = 11). Anal groove ( Fig. 21C View FIGURE 21 ) oval with open posterior margin; ventral setae ( Fig. 21C View FIGURE 21 ) numerous, evenly distributed. Spiracular plates ( Fig. 21D View FIGURE 21 ) length 145–204 (166 ± 18; n = 10), width 179–217 (191 ± 12; n = 10), ratio 0.80–0.94 (0.87 ± 0.05; n = 10), broadly oval.
Gnathosoma ( Fig. 22A, B View FIGURE 22 ) length from palpal apices to posterior margin of basis capituli ventrally 459–510 (484 ± 15; n = 9), width at dorsal cornua apices 323–366 (343 ± 15; n = 10), ratio 1.35–1.49 (1.42 ± 0.04; n = 9). Basis capituli ( Fig. 22A, B View FIGURE 22 ): dorsally subtriangular, posterior margin slightly convex with long posterolaterally directed cornua; ventrally pentagonal; auriculae relatively short: length 21–26 (24 ± 2; n = 10), ratio length of gnathosoma to length of auriculae 18–23 (20 ± 2; n = 9), triangular, directed slightly posterolaterally. Palpi ( Fig. 22A, B View FIGURE 22 ): elongate, length dorsally (segments II and III) 213–221 (219 ± 4; n = 9), width 102–111 (107 ± 4; n = 9), ratio 1.92–2.17 (2.05 ± 0.10; n = 9); segment I well developed, with relatively short internal projection directed anteriorly and giving L-shape to segment I dorsally and ventrally; length of internal projection ventrally from base of palpal segment II to anterior apex 26–30 (28 ± 2; n = 9), ratio combined length of palpal segments II and III to length of internal projection on palpal segment I ventrally 7.08–8.67 (7.79 ± 0.64; n = 9); segments II and III fused with indistinct suture between them, narrower proximally and gradually widening to broadly rounded apex. Hypostome ( Fig. 22B View FIGURE 22 ) length 221–253 (242 ± 13; n = 7), width 85–115 (95 ± 10; n = 7), ratio 2.17–2.87 (2.58 ± 2; n = 7); widest at approximately its mid-length; base of hypostome approximately at same level as base of palpal segment II; proximal portion of hypostome without denticles very short, then dental formula 2/2 for approximately 2 or 3 rows, 3/3 for approximately 5–7 rows and 4/4 for approximately 0–2 rows; apex broadly rounded with irregular smaller denticles.
Legs moderately long. Coxae ( Fig. 22C View FIGURE 22 ): coxae I-III with well-developed internal and external spurs, coxa IV with well-developed external spur and indistinct internal spur; external spur on coxae I-IV moderately long, narrow, narrowly rounded at apex, curved slightly posteromedially; external spur on coxae I-IV nearly subequal; internal spur on coxae I-III short, broad and narrowly to broadly rounded at apex, shorter than external spur; no syncoxae. Trochanters I-IV ( Fig. 22C View FIGURE 22 ) with short ventral spur. Tarsus I length 553–595 (577 ± 15; n = 11); tarsus IV length 468–544 (506 ± 18; n = 11).
Larva [Based on 42 specimens; Figs. 23 View FIGURE 23 , 24 View FIGURE 24 .] Idiosoma ( Fig. 23B View FIGURE 23 ): broadly suboval, widest close to mid-length. Scutum ( Fig. 24A View FIGURE 24 ) length 365–400 (378 ± 16; n = 5), width 425–495 (446 ± 29; n = 5), ratio 0.81–0.87 (0.85 ± 0.02; n = 5); hexagonal, lateral margins diverging for slightly more than 1/2 of scutal length, then converging to straight posterior margin; posterolateral margins with very slight depressions; lateral carinae absent; cervical grooves faint, shallow depressions; surface of scutum roughly sculptured. Setae: 5 pairs, length of Sc 2 21–26 (23 ± 2; n = 5); length of Sc 3 22–30 (25 ± 3; n = 5); alloscutum ( Fig. 23A View FIGURE 23 ) as illustrated. Dorsal setae approximately 17–19 pairs (usually 19); approximately 4–6 (usually 6) pairs of central dorsals, length of Cd 1 43–50 (47 ± 3; n = 5), length of Cd 2 30–40 (33 ± 4; n = 5); 12–13 (usually 13) pairs of marginal dorsals combined with supplementaries, length of Md 1 32–47 (39 ± 6; n = 5). Venter ( Fig. 23B View FIGURE 23 ) as illustrated; anal groove indistinct anteriorly and open posteriorly. Ventral setae approximately 15–19 pairs plus 1 pair on anal valves; 3 pairs of sternals, length of St 1 38–45 (42 ± 3; n = 5); 2 pairs of preanals, length of Pa 1 42–52 (47 ± 4; n = 5), length of Pa 2 37–49 (42 ± 5; n = 5); approximately 7–11 pairs of premarginals; 3 pairs of marginal ventrals, length of Mv 1 22–30 (27 ± 4; n = 5).
Gnathosoma ( Fig. 24B–D View FIGURE 24 ): length from hypostomal apex to posterior margin of basis capituli ventrally 278–308 (291 ± 11; n = 5), width at dorsal cornual apices 180–200 (190 ± 8; n = 5); ratio 1.47–1.58 (1.53 ± 0.05; n = 5). Basis capituli ( Fig. 24B–D View FIGURE 24 ): dorsally subtriangular, posterior margin slightly convex with long posterolaterally directed cornua; ventrally pentagonal with relatively short, triangular auriculae, directed posterolaterally. Post-hypostomal setae 2 pairs. Palpi ( Fig. 24B, C View FIGURE 24 ): elongate, length (segments II and III) 118–128 (122 ± 5; n = 5), width 55–60 (57 ± 2; n = 5), ratio 2.04–2.27 (2.14 ± 0.08; n = 5); segment I well developed, with relatively short internal projection directed anteriorly and giving L-shape to segment I dorsally and ventrally; length of internal projection ventrally from base of palpal segment II to anterior apex 15–18 (17 ± 1; n = 5), ratio combined length of palpal segments II and III to length of internal projection on palpal segment I ventrally 6.71–8.33 (7.29 ± 0.66; n = 5); segments II and III fused, suture between them indistinct; segment I lacking setae, 10 dorsal and 3 ventral setae on segments II and III combined. Hypostome ( Fig. 24C View FIGURE 24 ): length 120–133 (125 ± 5; n = 5), width 58–75 (64 ± 7; n = 5), ratio 1.78–2.13 (1.97 ± 0.14; n = 5); base of hypostome nearly at same level as articulation of palpal segments I and II; proximal portion without denticles very short, then dental formula 1/1 for 1 row, 2/2 for usually 4 rows and 3/3 for usually 4 or 5 rows; apex broadly rounded with irregular small denticles.
Legs moderately long. Coxae ( Fig. 24E View FIGURE 24 ): coxae I-III with internal and external spurs; external spur on coxae I-III moderately long, narrow, narrowly rounded at apex, curved slightly posteromedially; external spur on coxae I-III nearly subequal; internal spur on coxa I short to moderately long, broad, narrowly to broadly rounded at apex, slightly shorter than external spur; internal spur on coxa II short, broadly triangular; internal spur on coxa III poorly distinct, very short, ridge-like; no syncoxae; coxa I with 3 setae, coxa II with 2 setae, coxa III usually with 3 setae. Trochanters I and II with short ventral spur; trochanter III lack of ventral spur ( Fig. 24E View FIGURE 24 ). Tarsus I length 310–335 (326 ± 9; n = 5); tarsus III length 290–333 (311 ± 17; n = 5).
Remarks. The description and illustrations of the nymph of I. auritulus in Durden and Keirans (1996) is partially based on specimens of I. guglielmonei n. sp.
By having a distinct, anteriorly directed internal projection on palpal segment I, the female of I. guglielmonei n. sp. most closely resembles the following Ixodes (Multidentatus) spp.: I. auritulus , I. brevisetosus n. sp., I. contrarius n. sp., I. cornuae , I. insulae n. sp., I. kerguelenensis , I. moralesi n. sp., I. paranaensis , I. percavatus , I. rio n. sp., I. robbinsi n. sp., I. tinamou n. sp. and I. zealandicus .
The female of I. guglielmonei n. sp. can be distinguished from the female of I. cornuae by having short cornua (vs very long cornua in that species); from females of I. kerguelenensis and I. percavatus by having the indistinct mesodorsal spur on palpal segment I (vs large, distinct spur in those species); from the female of I. paranaensis by having longer auriculae (vs very short auriculae in that species) (see Arthur 1960; Wilson 1970; Barros-Battesti et al. 2003).
The female of I. guglielmonei n. sp. can be distinguished from females of other species by the broad scutum: mean ratio length to width 1.25 (vs narrower scutum: mean ratio 1.44 in I. brevisetosus n. sp., 1.45 in I. contrarius n. sp., 1.35 in I. insulae n. sp., 1.41 in I. rio n. sp. and 1.37 in I. zealandicus ); long setae in both center and area medial to marginal grooves of alloscutum: mean ratio length of setae in alloscutal area medial to marginal grooves to length of setae in center of alloscutum 1.09 (vs shorter setae in center of alloscutum: mean ratio 3.40 in I. auritulus , 1.58 in I. brevisetosus n. sp., 3.75 in I. contrarius n. sp., 2.00 in I. insulae n. sp., 3.68 in I. moralesi n. sp., 4.00 in I. rio n. sp., 2.65 in I. robbinsi n. sp. and 2.99 in I. tinamou n. sp.); long setae of alloscutum medial to marginal grooves: mean ratio length of scutum to length of alloscutal setae medial to marginal grooves 15.16 (vs shorter setae of alloscutum medial to marginal grooves: mean ratio 45.62 in I. brevisetosus n. sp., 20.89 in I. moralesi n. sp. and 26.93 in I. robbinsi n. sp.); basis capituli slightly convex dorsolaterally (vs basis capituli with angular dorsolateral projections in I. brevisetosus n. sp. and I. rio n. sp.); lateral surface of basis capituli concave (vs lateral surface flat in I. brevisetosus n. sp.); posterior margin of basis capituli slightly sinuously concave (vs slightly convex in I. auritulus , I. brevisetosus n. sp., I. contrarius n. sp., I. insulae n. sp., I. moralesi n. sp., I. rio n. sp., I. robbinsi n. sp. and I. tinamou n. sp.); long cornua: mean ratio length of basis capituli to cornual length 4.94 (vs shorter cornua: mean ratio 14.00 in I. contrarius n. sp., 10.00 in I. rio n. sp., 9.01 in I. tinamou n. sp. and 7.25 in I. zealandicus ); broad porose areas: mean ratio width of basis capituli to width of porose area 2.91 (vs narrower porose areas: mean ratio 3.61 in I. brevisetosus n. sp. and 3.47 in I. rio n. sp.); auriculae short: mean ratio gnathosoma length dorsally to length of auriculae 28.15, broad, directed posterolaterally, with broadly rounded apex (vs longer auriculae: mean ratio gnathosoma length dorsally to length of auriculae 9.74 in I. auritulus , 8.97 in I. brevisetosus n. sp., 8.61 in I. contrarius n. sp., 8.97 in I. insulae n. sp., 11.33 in I. moralesi n. sp., 9.64 in I. rio n. sp., 14.59 in I. robbinsi n. sp. and 19.54 in I. zealandicus ; shorter auriculae: mean ratio gnathosoma length dorsally to length of auriculae 43.38 in I. tinamou n. sp.; auriculae distinctly narrower, directed posteriorly, with narrowly rounded apex in I. auritulus , I. brevisetosus n. sp., I. contrarius n. sp., I. insulae n. sp. and I. rio n. sp.); lack of distinct spur at base of palpal segment I dorsally (vs short mesodorsal spur at base of palpal segment I dorsally in I. insulae n. sp., I. moralesi n. sp. and I. zealandicus ); shortest internal projection on palpal segment I: mean ratio length of palpal segments II and III to length of projection on palpal segment I 4.94 (vs longer projection: mean ratio 2.93 in I. auritulus , 2.77 in I. brevisetosus n. sp., 1.88 in I. contrarius n. sp., 3.55 in I. insulae n. sp., 3.08 in I. moralesi n. sp., 2.83 in I. rio n. sp., 3.02 in I. robbinsi n. sp. and 3.69 in I. tinamou n. sp.); short dorsoapical spur on palpal segment I (vs moderate spur in I. auritulus , I. brevisetosus n. sp., I. insulae n. sp. and I. zealandicus ; large, hook-like spur in I. moralesi n. sp.), broad palpal segments II and III: mean ratio length to width 2.16 (vs narrower segments: mean ratio 2.55 in I. auritulus , 2.82 in I. brevisetosus n. sp., 2.53 in I. contrarius n. sp., 2.64 in I. insulae n. sp., 2.46 in I. moralesi n. sp., 2.87 in I. rio n. sp., 2.41 in I. robbinsi n. sp., 2.44 in I. tinamou n. sp. and 2.42 in I. zealandicus ); poorly distinct, very short internal spur on coxa I (vs clearly distinct, moderately short internal spur on coxa I in I. auritulus , I. brevisetosus n. sp., I. contrarius n. sp., I. insulae n. sp., I. moralesi n. sp., I. rio n. sp., I. robbinsi n. sp. and I. zealandicus ); external spur on coxae I-IV relatively long, narrow, sharp at apex (vs shorter, broader spur with broadly rounded apex in I. tinamou n. sp. and I. zealandicus ); generally the largest of all discussed species: see description for measurements (vs all other species noticeably smaller. See descriptions for measurements).
The nymph of I. guglielmonei n. sp. can be distinguished from nymphs of I. auritulus , I. brevisetosus n. sp., I. robbinsi n. sp. and I. tinamou n. sp. by its moderately long and broad scutum (vs shorter and narrower scutum in I. auritulus and I. tinamou n. sp.; narrower scutum in I. brevisetosus n. sp.; shorter scutum in I. robbinsi n. sp.), longer setae in posterocentral field of scutum (vs shorter setae in all other species), long setae on alloscutum in area medial to marginal grooves (vs shorter setae in I. brevisetosus n. sp., I. robbinsi n. sp. and I. tinamou n. sp.), long setae in center of alloscutum (vs shorter setae in all other species), setae on alloscutum in area medial to marginal grooves subequal to setae in center of alloscutum (vs setae of alloscutum in area medial to marginal grooves at least 1.5 times, but usually more than twice, longer than setae in center of alloscutum), relatively long and broad spiracular plate (vs narrower spiracular plate in I. auritulus and I. brevisetosus n. sp.; shorter and narrower spiracular plate in I. tinamou n. sp.), relatively long and broad gnathosoma (vs shorter and narrower gnathosoma in all other species), moderately short auriculae (vs longer auriculae in I. auritulus and I. brevisetosus n. sp.; shorter auriculae in I. tinamou n. sp.), relatively long and broad palpal segments II and III (vs shorter and narrower segments in all other species), relatively short internal projection on palpal segment I (vs longer projection in all other species), relatively long and broad hypostome (vs shorter and narrower hypostome in all other species), relatively long tarsus I (vs shorter tarsus in all other species) and relatively long tarsus IV (vs shorter tarsus in all other species).
The larva of I. guglielmonei n. sp. can be distinguished from larvae of I. auritulus , I. brevisetosus n. sp. and I. robbinsi n. sp. by the straight posterior margin of scutum (vs usually broadly rounded in I auritulus and I. brevisetosus n. sp.); distinctly sculptured surface of scutum (vs usually sculpture of scutum poorly distinct in I. brevisetosus n. sp.); longer scutum (vs shorter scutum in I. brevisetosus n. sp.); larger dimensions of the following characters: width of scutum, length of gnathosoma, length and width of palpal segments II and III, length of hypostome, length of tarsi I and III (vs smaller size of the characters listed in all other species); longer setae Sc 2, Sc 3, Cd 2, Md 1, St 1, Pm 1 and Mv 1 (vs shorter setae in I. brevisetosus n. sp. and I. robbinsi n. sp.); longer setae Cd 1 and Pa 1 (vs shorter setae in all other species); longer setae Pa 2 (vs shorter setae in I. robbinsi n. sp.); shorter auriculae (vs longer auriculae in I. auritulus and I. brevisetosus n. sp.); shorter anterior projection on palpal segment I (vs longer projection in all other species); broader hypostome (vs narrower hypostome in I. auritulus and I. robbinsi n. sp.) and more distinct internal spur on coxa II (vs less distinct spur in all other species).
Collection data for I. guglielmonei n. sp. are listed in the material above. Collections of this species were made in Argentina (Tierra del Fuego Province) and Chile ( Antártica Chilena Province) ( Fig. 10D View FIGURE 10 ). All known stages of I. guglielmonei n. sp. were collected from birds. Female, nymphs and larvae of this species were collected from the striated caracara, P. australis ( Falconiformes : Falconidae ); female and nymphs were taken from the bar-winged cinclodes, C. fuscus ( Passeriformes : Furnariidae ); a female was found on the rufous-chested plover, C. modestus ( Charadriiformes : Charadriidae ). Females were collected during January and April, nymphs during January, April and May, larvae during April and May.
| USNTC |
U.S. National Tick Collection |
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