Analloptes giganteus, Mironov, Sergey & Hernandes, Fabio Akashi, 2014

Mironov, Sergey & Hernandes, Fabio Akashi, 2014, Two new species of the feather mite genus Analloptes (Trouessart, 1885) (Acariformes: Astigmata: Xolalgidae) from passerines (Aves: Passeriformes) in Brazil, Zootaxa 3889 (4), pp. 589-600 : 590-594

Analloptes giganteus sp. n.

( Figs. 1–3 )

Description. MALE (holotype, range for 4 paratypes in parentheses). Length of idiosoma 460 (450–455), width 300 (285–300), length of hysterosoma 345 (320–330). Prodorsal shield: occupying median part of prodorsum, anterior part with slightly concave lateral margins, posterior part with divergent posterior angles extending beyond level of scapular setae se and having rounded suprategumental extensions, posterior margin strongly concave, surface with a pair of median crests, greatest length 97 (90–95), greatest width 59 (60–62) ( Fig. 1 A). Setae ve present, represented by alveoli. Scapular setae se not exceeding the length of prodorsal shield, situated on small rounded sclerites, setal bases separated by 87 (82–85); setae si situated on striated tegument, their bases almost touching sclerites with bases of setae se. Scapular shields wide, inner margin convex, smooth, with suprategumental extension. Humeral shields fused at posterior ends with metapodosomal shields; seta c2 situated on inner margin of this shield. Hysteronotal shield: anterior margin straight, lateral margins with shallow extensions at level of trochanters III, not connected by sclerotized bridges to metapodosomal shields, length of the shield from anterior end to bases of setae h3 320 (300–310), width at anterior margin 130 (125–135), surface with large arch-shaped heavily sclerotized area. Dorso-median setae c1, d1, e1, h1 present; setae c1 off hysteronotal shield. Length of setae: c2 110 (100–105), d2 90 (90–100) and e2 120 (120–130). Opisthosomal lobes long, almost parallel, not narrowed apically, their posterior margins with three short thumb-like extensions bearing bases of setae ps2, h2, and h3 approximately at same transverse level, dorsal surface of each lobe with ovate lacuna, setae ps1 situated slightly anterior to level of setae h3, setae f2 at midlevel of lacunae. Terminal cleft fused to supranal concavity and its narrowed anterior end extends to level of setae d2, margins of terminal cleft between levels of setae d2 and cupules ip monotonously divergent, lateral margins of this cleft in posterior part slightly concave; length of cleft including concavity 270 (240–250), greatest width of posterior part 57 (40–55). Interlobar membranes extending from level of setae e2 to lobar apices, without extension beyond these apices, strongly overlapping each other inside terminal cleft and therefore incision between them is almost closed, length of incision between membranes 110 (95–100). Surface of terminal cleft and interlobar membranes with longitudinal striae. Lateral membranes wide, their posterior ends with short angular extensions, extending slightly beyond posterior margins of opisthosomal lobes. Distances between dorsal setae: c2: c2 200 (190–200), c2: d2 80 (70–75), d2: e2 120 (115–120), e2: h3 120 (105–115), f2:h3 29 (20–30), ps1:h3 17 (12–16), h2:h2 84 (60–80), h3: h3 65 (35–57), ps1: ps1 48 (35–42), ps2:ps2 105 (80–100).

Sternum about 3/4 of total length of epimerites I, strongly thickened in anterior part. Coxal fields III open. Inner ends of epimerites IIIa free, with short sclerotized extensions directed antero-laterally. Coxal fields IV completely sclerotized. Epimerites IVa present, their anterior ends fused with corresponding adanal and genital shields forming a pair of opisthogastric shields of complicate form between coxal fields IV ( Fig. 1 B). Genital apparatus small, situated at level of trochanters III, 17 (15–21) long including aedeagus directed anterior, 22 (21–22) wide ( Fig. 3 E). Genital setae g situated immediately posterior to genital apparatus on soft tegument. Paragenital apodeme shaped as a thick inverted V, not connected to epimerites IVa, 33 (30–32) long, 39 (38–40) wide. Genital papillae situated on outer margins of paragenital apodeme. Setae 4b situated on inner ends of epimerites IIIa and slightly extending beyond level of setae 4a; setae 3a extending to level of anal opening. Setae ps3 situated on posterior ends of opisthogastric shields. Adanal suckers 35 (32–34) in diameter, corolla with radiate striation. Distance between ventral setae: 4b:4b 47 (45–55), 4b:g 40 (42–44), g:ps3 59 (53–56), ps3:h3 165 (150–155).

Tarsi I, II with base of ambulacral stalk enlarged and extending proximally beyond midlevel of segment ( Figs. 3 A, B) Tarsus I without apico-dorsal extension; seta wa minute, much shorter than seta ra. Tarsus II with small apico-dorsal extension, setae e, f approximately at level of solenidion ω1, this solenidion about 3 times longer than this segment. Tibiae I, II without spine-like ventral processes. Tarsus III with bidentate apical process, length of this segment III 69 (68–70) ( Fig. 3 C). Tarsus IV 83 (80–82) long, with finger-like apical extension bearing setae d, e reduced to alveoli and small subapical indentation ( Fig. 3 D). Length of legs III and IV 320 (290–305) and 375 (360–370), respectively.

FEMALE (range for 6 paratypes): Length of idiosoma 380–420, greatest width 195–205, length of hysterosoma 270–305. Prodorsal shield: shaped as in male, 80–90 × 50–57 ( Fig. 2 A). Setae ve present, represented by alveoli. Scapular setae se situated on small circular sclerites, setal bases separated by 67–80; setae si on finely striated tegument. Scapular shields wide, inner margins with wide almost semicircular suprategumental extensions. Humeral shields well-developed, small, with rounded inner margin. Setae c2 situated off these shields on striated tegument, 40–55 long. Setae c3 filiform, subequal to total length of femur and genu III. Setae cp represented by macrosetae. Hysteronotal shield: a longitudinal plate occupying median part of hysterosoma; anterior margin straight, lateral margins slightly concave, posterior margin concave, posterior angles acute; greatest length 190–195, width at anterior margin 60–65, width at posterior margin 80–90. Setae c2, d1, d2, e1, e2 and h1 situated on hysteronotal shield, setae c1 on striated tegument. Setae d2, e2 filiform, 30–45 long; setae h2 and h3 represented by macrosetae about 220–250 long. Pygidial shields absent. Copulatory opening subterminal, on small strongly sclerotized extension. Distance between dorsal setae: c2: d2 80–95, d2: e2 105–115, e2: h3 65–82, h2:h2 65–84, h3: h3 58–75.

Sternum as in male. Epigynum large, arch-shaped, tips extending to level of epimerites IIIa, 49–54 × 60–71. Apodemes of oviporus short, slightly extending beyond posterior tips of epigynum. Setae 4b on transverse branch of epigynum; setae g and genital papillae on posterior tips of epigynum, posterior to level of coxal setae 3a. Setae 4a short, situated slightly posterior to epimerites IIIa. Distance between ventral setae: 4b:3a 30–33, 4 b:g 37–44, 4 b:4a 56–65.

Legs I, II as in male. Solenidion ω1 of tarsus II slightly longer than this segment ( Figs. 3 F, G). Tarsi III and IV 54 –57 and 63–68 long, respectively, with short apical spine ( Figs. 3 H, I). Setae sR III shorter than corresponding femoragenu. Setae w of tarsi III, IV slightly thickened in basal part.

Type material. Male holotype (DZUNESP-RC #1795), 4 male and 6 female paratypes from Conopophaga lineata (Wied) (Conopophagidae) , BRAZIL: São Paulo, Rio Claro, Horto Florestal Edmundo Navarro de Andrade, 22°24’ S, 47°31’ W, 9 August 2014, coll. F.A.F. Jacomassa.

Type depository. Holotype, 3 male and 4 female paratypes—DZUNESP-RC, remaining paratypes—ZISP.

Etymology. The specific epithet giganteus refers to the relatively large size of males of this species, comparing to other known species of the genus.

Differential diagnosis. Within the genus Analloptes , which previously included nine described species ( Gaud & Atyeo 1981, 1984; Mironov 1997), the new species Analloptes giganteus sp. n. and A. cnemotricci sp. n. (see below) constitute a distinct species group, characterized by the following combination of features: in both sexes, setae ve and c1 present, and in males, the paragenital apodeme is represented by a relatively small arch well separated from epimerites IVa and other coxal structures. Females of the two new species also differ from most previously known species by lacking of the pygidial shields (vs present in A. buettikeri and all species from Bucerotidae ).

Among previously described species, Analloptes giganteus can be compared with A. megnini ( Trouessart, 1885) from Rallus aquaticus Linnaeus by having the inner tips of epmerites IIIa free in males and by the absence of the pygidial shields in females. In addition to the aforementioned features characterizing the species group, A. giganteus differs from A. megnini by the following characters: in both sexes, the prodorsal shield has a concave posterior margin and divergent posterior angles bearing suprategumental extensions, the suprategumental extensions of the scapular shields is wide and rounded, setae ve and c1 are present, seta e of tarsus II is moved from the tarsal apex to the level of solenidion ω1; in males, the hysteronotal shield is not connected with the metapodosomal shields, the opisthosomal lobes are not attenuate apically and have three small thumb-like extensions bearing bases of setae h2, h3, and ps2 approximately at the same transverse level; in females, the posterior part of the hysteronotal shield is just slightly larger than the anterior part, idiosomal setae d1, d2 and e2 are situated on the hysteronotal shield. In both sexes of A. megnini , the prodorsal shield has an acute medial extension on the posterior margin, the suprategumental extensions on the posterior angles of this shiels are absent, the suprategumental extensions of the scapular shields are narrow, setae ve and c1 are absent, seta e of tarsus II is situated on the tarsal apex; in males, the hysteronotal shield is connected by oblique bulks with the metapodosomal shields, the opisthosomal lobes are attenuate apically and setae h3, h2 and ps2 are arranged on their postero-lateral margins in an oblique row; in females, the posterior part of the hysteronotal shields is approximately twice as wide as the anterior part, setae d1, d2 and e2 are situated on the striated tegument of hysterosoma.

Figures

FIGURE 1. Analloptes giganteus sp. n., male. A — dorsal view, B — ventral view.

FIGURE 2. Analloptes giganteus sp. n., female. A — dorsal view, B — ventral view.

FIGURE 3. Analloptes giganteus sp. n., details. A – B — leg I – II of male, respectively, C – D — tibiae and tarsi III – IV of male, respectively, E — genital apparatus of male, F – G — tarsi I – II of female, respectively, H — leg III of female, I — tibia and tarsus IV of female.