Ixodes nipponrhinolophi Hornok & Takano, 2023
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publication ID |
https://dx.doi.org/10.3897/zookeys.1180.108418 |
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publication LSID |
lsid:zoobank.org:pub:6112D084-4D9C-4A55-9AC2-C4F2B2245D49 |
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persistent identifier |
https://treatment.plazi.org/id/08621B6E-5F55-44DB-8DBE-C3B9C5363558 |
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taxon LSID |
lsid:zoobank.org:act:08621B6E-5F55-44DB-8DBE-C3B9C5363558 |
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treatment provided by |
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scientific name |
Ixodes nipponrhinolophi Hornok & Takano |
| status |
sp. nov. |
Ixodes nipponrhinolophi Hornok & Takano sp. nov.
Figs 2 View Figure 2 , 3 View Figure 3
Diagnosis.
Medium size (female 4 mm long) brown tick. Legs and palps long. Scutum posteriorly broad, rounded, with moderately deep cervical grooves and pits. Hair covering dense both dorsally and ventrally. Coxae without spurs, coxae I and II with straight and III and IV with semicircular medial edges. Spiracular plates subcircular.
Material examined.
Holotype: female, from Rhinolophus cornutus Temminck, Japan, Yamaguchi, Mine city, 34.251084°N, 131.243056°E (DD), 25 February 2021, A. Takano coll. GoogleMaps Paratypes: five females. (1): from Rhinolophus ferrumequinum (Schreber), Japan, Kumamoto, Kuma-gun , 32.252183°N, 130.651239°E (DD), 24 December 1973, K. Funakoshi coll. (2) GoogleMaps : female, from Rhinolophus ferrumequinum , Japan, Kumamoto, Kuma-gun , 32.252183°N, 130.651239°E (DD), 12 April 1979, K. Funakoshi coll. (3) GoogleMaps : female, from Rhinolophus ferrumequinum , Japan, Kumamoto, Kuma-gun , 32.252183°N, 130.651239°E (DD), 10 May 1979, K. Funakoshi coll. (4) GoogleMaps : female, from Rhinolophus ferrumequinum , Japan, Kumamoto, Kuma-gun , 32.252183°N, 130.651239°E (DD), 25 May 1979, K. Funakoshi coll. (5) GoogleMaps : female, from Rhinolophus cornutus , Japan, Gunma, Tano-gun , 36.086915°N, 138.721945°E (DD), 23 April 2005, M. Takahashi coll. GoogleMaps
Morphology of female (holotype, unengorged).
Length of the idiosoma (from the half point between scapular apices to the middle of posterior margin) 3.18, width 1.74, ratio of idiosomal length/width 1.83 (Suppl. material 2: fig. 1A).
Scutum elongated, tie-shaped, broadest near posterior third. Deepest point of concavity at anterior third of length (Fig. 2C View Figure 2 - 1 View Figure 1 ). Length of scutum 1.62, maximum width 0.99, ratio of length/width 1.64. Scutum with cervical grooves deep, narrow in second quarter of length (Fig. 2C-2 View Figure 2 ); scattered, small punctuations; and two pits close to its maximum width (Fig. 2C View Figure 2 - 3 View Figure 3 ). Posterolateral edge (after maximum width) convex. Scutal setae few, close to scapulae 0.03 long.
Alloscutum with dense hair covering dorsally. Length of centrodorsal setae 0.1, marginodorsal setae 0.16. Idiosoma has dense hair covering ventrally. Genital aperture broad U-shaped, with nearly parallel end (Fig. 2D View Figure 2 - 1 View Figure 1 ), slightly posterior to 2nd-to-3rd intercoxal space. Genital groove posteriorly converging, then diverging (Fig. 2D-2 View Figure 2 ), bowling pin-shaped (Suppl. material 2: fig. 1B). Spiracular plates subcircular, diameter 0.44, aeropyles randomly distributed, width of aeropyle rows (minimum to maximum) 2:7; position of spiracle opening submarginal, rounded, diameter 0.06 (Suppl. material 2: fig. 1C). Anal valves with 4-4 setae, arranged in C-shaped curve (Suppl. material 2: fig. 1D). Anal groove slightly converging (Suppl. material 2: fig. 1B).
Length of gnathosoma (from palpal apices to posterior margin of basis capituli) 0.84, width of basis capituli dorsally 0.63. Ratio of gnathosomal length/basis capituli width 1.33. Basis capituli triangular, its sides anteriorly converging, broadest at lateral ridge continuing ventrally (Fig. 2A View Figure 2 - 1 View Figure 1 ), posteriorly as broad as at maximum width of palpal base, without cornuae; posterior margin dark, sclerotised, nearly linear. Shape of areae porosae triangular anteriorly, broad posteriorly (Fig. 2A-2 View Figure 2 ), with short, low lateral ridge (Fig. 2A View Figure 2 - 3 View Figure 3 ). Ventrally the basis capituli triangular anterior to maximum width, reverse trapezoidal posteriorly, with squared concavity in between. Auriculae absent (Fig. 2B View Figure 2 - 1 View Figure 1 ).
Palps (dorsal view) long, club-shaped, length 0.7, broadest anterior to junction of segments II and III, maximum width 0.17, ratio of length/width 4.1. Palpal hairs 0.03-0.08, longest medially on palpal segment II. Palpal segment I. 0.08, palpal segment II. 0.4, palpal segment III. 0.23 long. Ratio of palpal segments II/III 1.8, segment II 2.8 × longer than broad when viewed vertically; its “stalk” with surface in level with that of broad part (Fig. 2A View Figure 2 - 4 View Figure 4 ).
Hypostome lanceolate, anterior tapering straight, apex pointed. Length 0.4, width 0.18, ratio of length/width 2.2. Dental formula 3/3 (mid-length), apically 4/4 or more. Teeth posteriorly long (0.06), slender, elevated (Fig. 2B-2 View Figure 2 ).
Legs long and slender. All coxae marginally dark (sclerotised), without spines or spurs. Coxa I trapezoid, with minute hairs (posteriorly 0.05). Coxa II rectangular, medial edge straight (Fig. 2D View Figure 2 - 3 View Figure 3 ), posteriorly wrinkled, posterolateral hairs short (0.1). Coxa III semicircular (Fig. 2D View Figure 2 - 4 View Figure 4 ), hairs 0.03-0.07. Coxa IV semicircular, hairs 0.05. Tarsus I with long setae (<0.25) dorsally, length 1.3, maximum diameter 0.15, ratio of length/diameter 8.7. Haller’s organ elongated, with grouped (non-linear) anterior pit sensillae, one of them longer (0.04).
Differential diagnosis.
Ixodes nipponrhinolophi Hornok & Takano, sp. nov. is easily distinguished from members of the Ixodes simplex complex based on the long legs, and from members of the Ixodes ariadnae complex according to its long palps. Within the Ixodes vespertilionis complex, differences in comparison with females of the most similar species, Ixodes collaris include the following characters of the latter. Anteriolaterally on the scutum, the deepest point of concavity is at the anterior 1/8 of its length (Fig. 3C View Figure 3 - 1 View Figure 1 ); cervical grooves broad (Fig. 3C View Figure 3 - 2 View Figure 2 ), there are no pits; punctuations dense, especially anteriolaterally, (Fig. 3C-3 View Figure 3 ). Genital aperture horizontally C-shaped, with diverging end (Fig. 3D View Figure 3 - 1 View Figure 1 ), between third coxae, genital groove posteriorly diverging (Fig. 2D-2 View Figure 2 ; Suppl. material 3: fig. 2B). Spiracle opening elongated, diameter 0.1 (Suppl. material 4: fig. 3C). Anal groove parallel behind the anus (Suppl. material 3: fig. 2D). Basis capituli posteriorly with transverse ridge, continuing laterally then ventrally as broad “collar” (Fig. 3A View Figure 3 - 1 View Figure 1 ); shape of areae porosae elongated, tapering both anteriorly and posteriorly (Fig. 3A View Figure 3 - 2 View Figure 2 ), their border well-defined, elevated laterally as diverging, then converging high ridge (Fig. 3A-3 View Figure 3 ). Ventrally collar broad, extending above first coxae parallel with their surface (Fig. 3B View Figure 3 - 1 View Figure 1 ), unlike in I. nipponrhinolophi Hornok & Takano, sp. nov. Ratio of palpal segments II to III 1.6, segment II only 2.1-times longer than broad when viewed vertically; its broad part with surface elevated above that of “stalk” (Fig. 3A View Figure 3 - 4 View Figure 4 ). Hypostome teeth posteriorly less elevated (Fig. 3B View Figure 3 - 2 View Figure 2 ). Medial edge of coxa II slightly curved (Fig. 3D-3 View Figure 3 ), of coxa III straight (Fig. 3D View Figure 3 - 4 View Figure 4 ).
Gene sequences.
The complete mitochondrial genome sequence was deposited in GenBank (LC769935). All accession numbers relevant to the new species are listed in Suppl. material 1.
Host records.
Known host species: Rhinolophus cornutus , Rhinolophus ferrumequinum .
Etymology.
The name of the new species refers to Japan (in Japanese: Nippon), where all specimens have been collected, and to the type host family of horseshoe bats, Rhinolophidae .
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.