Allodectes sejugaspis, Hernandes, Fabio Akashi, 2013

Hernandes, Fabio Akashi, 2013, The feather mites (Acari, Astigmata) of the Violet-capped Woodnymph, Thalurania glaucopis (Gmelin) (Aves, Trochilidae), with descriptions of three new species, Zootaxa 3616 (6), pp. 563-577 : 564-568

publication ID

https://dx.doi.org/10.11646/zootaxa.3616.6.3

publication LSID

lsid:zoobank.org:pub:05C89903-B7A0-45BC-B316-931E789BDAFD

DOI

https://doi.org/10.5281/zenodo.6151645

persistent identifier

https://treatment.plazi.org/id/05530039-220A-B861-FF27-10FAFCF1FD34

treatment provided by

Plazi

scientific name

Allodectes sejugaspis
status

sp. n.

Allodectes sejugaspis sp. n.

( Figs. 1–3 View FIGURE 1 View FIGURE 2 View FIGURE 3 )

Type material. Male holotype, 5 male and 3 female paratypes from Thalurania glaucopis (Gmelin) ( Trochilidae ), Reserva "Bicudinho-do-brejo", Guaratuba, Paraná, Brazil, 25 º 45 ’23.1"S; 48 º 43 ’35.2"W, 11.I. 2012, coll. F.A. Hernandes.

Description. MALE [holotype, measurements for 5 paratypes in parentheses]. Idiosoma, length × width, 397 (387–402) × 222 (219–224). Prodorsal shield: posterior margin almost straight, total length of shield along midline 116 (112–121), width 156 (152–163), surface uniformly punctate; scapular setae se 169 (158–188), those setae separated by 74 (70–76); setae si separated by 48 (46–49). Scapular shields present dorsally, bearing oblique slit on basal third. Small pair of shields present on the striated tegument between the prodorsal and the anterior hysteronotal shields. Humeral shields situated dorso-laterally, metapodosomal shields present dorsally slightly above trochanters IV. Setae cp situated ventrally on humeral shields. Setae c 2 situated on the humeral shields. Subhumeral setae c 3 lanceolate, 49 (40–57) × 3 (3). Hysteronotal shield: greatest length 259 (248–262), width in anterior region 144 (142–153), anterior margin nearly straight, surface with faint longitudinal marks uniformly distributed throughout the shield. Distance between prodorsal and hysteronotal shields 14 (13–19). Posterior ends of opisthosoma with small lamellae. Supranal concavity present ( Figs. 1 View FIGURE 1 A). Setae h 1 situated anterior to level of supranal concavity. Setae h 3 setiform, 6 (6–8) long; setae h 2 365 (319–338) long; setae ps 2 20 (12–24) long; setae ps 3 34 (22–28) long. Distance between dorsal setae: si:c 1 84 (78–85), c 1:c 2 69 (66–69), c 1:d 1 67 (54–67), d 1:d 2 72 (70–91), d 2: e 1 49 (45–51), e 1:h 1 35 (33–38).

Epimerites I fused into a narrow V weakly connected at tips ( Fig. 1 View FIGURE 1 B). Coxal fields I-IV closed, setae 1 a situated on sclerotization of coxal fields I. Rudimentary sclerite rEpIIa absent. Epimerites IVa present. Length of aedeagus (from anterior bend to apex) 24 (23–25), genital arch width 32 (30–52). Genital shields present, bearing setae g. Anal suckers 21 (20–23) in diameter, distance between centers of suckers 33 (30–34), corolla with indentations. Distance between ventral setae: 3 a: 4a 41 (38–42), 4 a:g 32 (32–40).

Femur I with small ventral crest near base of setae vF. Solenidion σ 1 of genu about 1.5 × the length of segment, situated medio-dorsally. Genual seta cG I and II, and mG I and II, setiform. Genu IV bearing small paraxial spine distally. Solenidia ω 1 of tarsi I and II subequal in length. Legs IV noticeably larger than legs III. Tarsus IV 59 (55–56) long; tarsus III, IV bearing apico-dorsal spine ( Fig. 2 View FIGURE 2 C–D); small spine medially on tarsus IV, near base of seta w; setae d and e vestigial, only alveoli present, seta d situated antero-dorsally, seta e at apex of segment ( Fig. 2 View FIGURE 2 D).

FEMALE [2 paratypes]. Idiosoma, length × width, 429 – 427 × 214–219. Prodorsal shield: 126–130 × 163–164; scapular setae se 213 in length, those setae separated by 75–80, setae si separated by 43–50; general shape of the shield as in the male. Scapular shields present dorsally, as in the male. Small pair of shields present on the striated tegument between the prodorsal and the anterior hysteronotal shields. Humeral shields situated dorso-laterally. Setae cp situated ventrally on humeral shields. Setae c 2 situated on humeral shields. Setae c 3 lanceolate, 27–30 × 3–4. Distance between prodorsal and hysteronotal shields 9–18. Anterior margin of anterior hysteronotal shield nearly straight, posterior margin concave, greatest length 223 – 213, width at anterior margin 147–152, with longitudinal striae on postero-mesal surface ( Fig. 3 View FIGURE 3 A). Darker area on lateral margins of the shield. Length of lobar region 101–105, greatest width 99. Terminal cleft inverted U-shaped, 47 long. Setae h 2 setiform, total length 124–136, width at widest part 4–5. Setae h 3 setiform, 67–70 long, ca. 1 / 2 of terminal appendages. Distance between dorsal setae: si:c 1 79–84, c 1:c 2 65–74, c 1:d 1 63–70, d 1:d 2 101–104.

Epimerites I free, coxal fields I–IV closed. Coxal fields I and II as in male ( Fig. 3 View FIGURE 3 B). Epimerites IVa present. Epigynum 73 in widest part. Primary spermaduct slightly enlarged near head of spermatheca ( Fig. 3 View FIGURE 3 C); copulatory opening situated ventrally, posterior to anal opening, between inner ends of translobar apodemes. Pseudanal setae ps 2 and ps 3 setiform, seta ps 2 situated at level of setae f 2; distances between ventral setae: 1 a: 3a 30– 54, 3 a:g 36–44, g: 4a 73– 78, 4 a:ps 3 84–88, ps 2:ps 2 58–65, ps 3: ps 3 23–36.

Femur I with small ventral crest near base of setae vF; other leg segments without crests or processes. Solenidia of genu and tarsi as in the male. Genual seta cG I and II, and mG I and II, setiform. Solenidion ω 1 of tarsus I slightly shorter than that of tarsus II.

Differential diagnosis. The new species resembles A. amadoni Park & Atyeo, 1974 by having a spine only on male tarsi I, II, setae sRIII and c 3 subequal in length, and genu IV with paraxial spine. It can be clearly distinguished from A. amadoni and from all other species of the genus by the presence in both sexes of a pair of dorsal shields in the sejugal region, between the prodorsal and the hysteronotal shield.

Etymology. Contraction from sejugal + Greek aspis, shield, referring to the pair of dorsal shields in the sejugal region, between the prodorsal and hysteronotal shields.