Feather mites (Acariformes: Astigmata) of the brown noddy, Anous stolidus (L.) (Charadriiformes: Laridae), with description of two new species from Brazil Author Hernandes, Fabio Akashi Departamento de Ecologia e Zoologia, CCB / ECZ, Trindade, Universidade Federal de Santa Catarina, 88040 - 970 - Florianópolis, SC, Brazil. & CNPq-Brazil Researcher. Author Brito, Guilherme R. R. Departamento de Ecologia e Zoologia, CCB / ECZ, Trindade, Universidade Federal de Santa Catarina, 88040 - 970 - Florianópolis, SC, Brazil. text Acarologia 2022 2022-03-11 62 2 317 331 journal article 2107-7207 Analloptes tintinnabulus Hernandes & Brito sp. nov. Zoobank: 0DE79C05-6DC6-4D96-B229-92D5253AF88D ( Figs. 5–7 ) Type Material — Holotype male and 1 paratype male ex Anous stolidus stolidus (Linnaeus, 1758) ( Charadriiformes : Laridae ), ( CAUFSC 00389), Praia do Campeche , Florianópolis, Santa Catarina, Brazil (lat -27.6893423, long -48.4811854), 27 Feb. 2021 , R 3 Animal col. Description — Male ( holotype , range for 1 paratype in parentheses) ( Figs. 5–7 ). Length of idiosoma 331 (342), greatest width 158 (155), length of hysterosoma 235 (240). Prodorsal shield: longitudinal plate slightly enlarged posteriorly, occupying median part of prodorsum, posterior margin convex, reaching the level of scapular setae se , surface smooth, greatest length 65 (66), greatest width roughly at level of se 21 (25) ( Fig. 5A ). Setae ve absent. Scapular setae se 84 (81), bases separated by 53 (56); setae si on striated tegument. Scapular shields narrow, inner margin slightly convex, surface smooth, without suprategumental extension. Humeral shields small; seta c2 situated on inner margin of this shield. Setae c3 short filiform, much shorter than trochanters III, setae cp long whip-like, similar in length to idiosoma width. Hysteronotal shield: anterior margin slightly concave, moderately darkened, with two lateral finger-like projections arising near bases of setae d1 , longitudinally split in two halves by long and wide incision occupying median area of hysteronotum and almost reaching the anterior margin of shield; length of the shield from anterior end to bases of setae h3 206 (222), width at anterior margin 74 (79), width including lateral finger-like extensions 101 (114), surface smooth. Anterior area of incision between the levels of setae d1 and e1 with longitudinal striae. Dorsal setae c1 , h1 absent. Length of setae: d2 23 (27) and e2 32 (33). Opisthosomal lobes long, almost parallel, with a pair of roughly oval lightly sclerotized areas between bases of setae f2 and ps1 . Interlobar membranes extending from level of trochanter IV onto lobar apices, with rounded terminal extension beyond lobar apices bearing setae h3 , overlapping each other inside terminal cleft, except small median longitudinal ellipsoid void anterior to level of setae f2 . Surface of interlobar membranes with several widely spaced striae on distal halves. Distances between dorsal setae: c2 : c2 138 (140), c2 : d2 53 (56), d2 : e2 66 (72), e2 : h3 75 (78), f2:f2 81 (90), ps1:ps1 45 (50), h3:h3 51 (61), h2 : h2 65 (74). Figure 5 Analloptes tintinnabulus sp. nov. ( Alloptidae ) male habitus: dorsal (A) and ventral (B) views. Epimerites I fused into a Y ( Fig. 5B ), sternum about ¼ of total length of epimerites I. Coxal fields I–III open. Inner ends of epimerites IIIa with short irregular sclerotized plate. Coxal fields IV closed, inner ends of epimerites IIIa and corresponding bases epimerites IVa connected by oblique long rib-like sclerite. Epimerites IV fused with pregenital apodeme in a high arch-shaped structure. Genital apparatus small, situated at level of trochanters III. Genital papillae situated at level of genital apparatus and setae 4a . Genital and adanal shields absent. Genital setae g minute, situated posterior to level of setae 4a . Setae 4b situated on inner ends of epimerites IIIa. Setae ps3 situated on striated tegument. Setae 3a , 4a , and 4b short filiform, not exceeding length of trochanters III. Adanal suckers 16 (16) in diameter, surrounding membrane with radiate striation. Distance between ventral setae: 4b:4b 44 (42), 4b:3a 9 (10), 4b:g 51 Figure 6 Analloptes tintinnabulus sp. nov. male legs in dorsal view: trochanter–tarsus I (A), II (B), genu, tibia, and tarsus III (C), tibia and tarsus IV (D). (55), g: ps3 25 (27). Legs III thin, legs IV more robust than other legs. Tarsus I without apico-dorsal extension; seta wa much shorter than ra . Tarsus II with small apico-dorsal extension near base of seta d , solenidion ω1on medium-sized dorsal hump. Tarsi I, II with two rounded ventral expansions between seta wa and base of tarsal stalk. Tibia I, II with spine-like ventral processes. Tarsus III excluding ambulacrum 52 (54) long. Tarsus IV 78 (86) long, with small extension bearing base of seta r , setae d , e reduced to alveoli ( Fig. 6D ). Length of legs III and IV excluding ambulacra 161 (159) and 227 (222), respectively. Length of solenidia: σ I 48 (50), σII 20 (21), σIII 31 Figure 7 Analloptes tintinnabulus sp. nov. male, microphotographs: habitus (A), dorsal view of anterior idiosoma (B), and ventral view of opisthosoma (C). (29), φI 68 (63), φII 84 (92), φIII 60 (62), φIV 86 (94), ω1I 23 (26), ω3I 38 (38), ω1II 55 (61). Female unknown. Differential diagnosis — The new species is close to Analloptes psophiae (Trouessart and Neumann, 1888) described from Psophia crepitans Linnaeus (= Psophia agami ) ( Gruiformes : Psophiidae ) by the similar shape of male lobes, with overlapping interlobar lamellae with largely spaced striae. It differs from the latter species, however, in a number of features. In males, the anterior corners of the hysteronotal shield near bases of setae d1 have two short finger-like extensions pointing postero-laterally, the longitudinal incision in the hysteronotal shield almost reaches the anterior margin of the shield, setae cp are similar in length to idiosoma width, seta c2 is much shorter than se (about 1/5 its length), solenidion σ on genu I is as long as genu + tibia combined, solenidion ω3 on tarsus II about 1.5 times the length of the segment. In males of A. psophiae , the anterior extensions on the hysteronotal shield are long and fused with metapodosomal sclerites, the longitudinal incision in the hysteronotal shield does not reach the anterior margin of the shield, setae cp are large spiculiform, about ¼ the distance between their bases, seta c2 are about as long as seta se , solenidion σ on genu I is about 1/3 the length of tibia alone, and solenidion ω1 on tarsus II is shorter than the tarsus. Etymology — The specific name is derived from tintinnabulum (L. small bell.), adjective, masculine. The species name is an allusion to the adornments and pendants – small bells – possessed by the court jesters employed to entertain noblemen from the Medieval and Renaissance times. The scientific name of the host can be translated as characteristics often attributed to court jesters (G. Anous = stupid, foolish; L. stolidus = stupid, foolish) ( Jobling 2010 ).