Research Article |
Corresponding author: Jeong-Hoon Kim ( jhkim94@kopri.re.kr ) Corresponding author: Gi-Sik Min ( mingisik@inha.ac.kr ) Academic editor: Vladimir Pesic
© 2021 Yeong-Deok Han, Sergey V. Mironov, Jeong-Hoon Kim, Gi-Sik Min.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Han Y-D, Mironov SV, Kim J-H, Min G-S (2021) Feather mites (Acariformes, Astigmata) from marine birds of the Barton Peninsula (King George Island, Antarctica), with descriptions of two new species. ZooKeys 1061: 109-130. https://doi.org/10.3897/zookeys.1061.71212
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We report on the first investigation of feather mites associated with birds living on the Barton Peninsula (King George Island, Antarctica). We found seven feather mite species of the superfamily Analgoidea from four host species. Two new species are described from two charadriiform hosts: Alloptes (Sternalloptes) antarcticus sp. nov. (Alloptidae) from Stercorarius maccormicki Saunders (Stercorariidae), and Ingrassia chionis sp. nov. (Xolalgidae) from Chionis albus (Gmelin) (Chionidae). Additionally, we provide partial sequences of the mitochondrial cytochrome c oxidase subunit I (COI), which was utilized as a DNA barcode, for all seven feather mite species.
Alloptes, Analgoidea, Antarctica, feather mites, Ingrassia, systematics
Feather mites (Astigmata, Analgoidea and Pterolichoidea) are a vast group of highly specialized parasites or mutualistic ectosymbionts that spend their entire life cycle on their bird hosts (
Antarctica is the fifth largest and most isolated continent on our planet (
King George Island is the largest of the South Shetland Islands at the northwest tip of the Antarctic Peninsula (
To date, no studies have been conducted on feather mites associated with birds living on the Barton Peninsula. In the present work, we report seven analgoid feather mites, including descriptions of two new species from the genera Alloptes and Ingrassia, found on four bird species on the Barton Peninsula of King George Island. Additionally, we provide DNA barcodes for the mitochondrial cytochrome c oxidase subunit I (COI) from these seven analgoid feather mite species.
Mite samples were obtained from the Antarctic Shag (L. bransfieldensis), South Polar Skua (S. maccormicki), Wilson’s Storm Petrel (O. oceanicus), and three Snowy Sheatbills (Ch. albus) in the Barton Peninsula. The birds were captured using a hand net or loop according to ‘SKUAS Manual for Fieldworkers’ (PBEG 2003), and all birds were released after collecting the mites. Feather mites were collected using 3M ScotchMagicTape (3M, St. Paul, Minnesota, USA) from the wing, down, and tail feathers, and then immediately preserved in 70% ethanol for 3 h. The preserved samples were separated from Scotch tape under a dissecting microscope with a dissecting needle and then preserved in 95% ethanol. The collected mite specimens were cleared in 10% lactic acid for 24 h at room temperature and then mounted on microscope slides using PVA mounting medium (BioQuip, Rancho Dominguez, California, USA).
Descriptions of two new species are given according to standard formats used for the corresponding feather mite taxa (
Before preparing the microscopic slides, genomic DNA was extracted from one leg of each specimen using a Tissue DNA Purification Kit (Cosmogenetech Inc., Seoul, Korea) according to the manufacturer’s instructions. The COI barcode fragment was amplified using two universal primers: bcdF05 (5′-TTTTCTACHAAYCATAAAGATATTGC-3′) and bcdR04 (5′- TATAAACYTCDGGATGNCCAAAAAA-3′) under the following conditions: 2 min at 94 °C; 40 cycles at 98 °C for 15 s, 50 °C for 30 s, and 68 °C for 60 s; and a final extension at 68 °C for 5 min (
Superfamily Analgoidea Trouessart & Mégnin, 1884
Alloptes is one of the most specious genera of the family Alloptidae and currently includes about 50 described species (
The subgenus Alloptes s. str. currently includes three species and is characterized by the following features (
Alloptes aschizurus
Gaud, 1952: 163–164, fig. 2;
Alloptes (Alloptes) aschizurus:
3 males and 3 females (NIBR No. NIBRIV0000887146–NIBRIV0000887151) from Chionis albus (Gmelin) (Charadriiformes, Chionidae), Antarctica, King George Island, Barton Peninsula, 62°14'16"S, 58°46'13"W, 8 January 2016, coll. Han Y.-D.
Alloptes (Alloptes) aschizurus was initially described from specimens collected from the Black-faced Sheathbill, Chionis minor (Hartlaub) on Kerguelen Island (
The subgenus Conurlloptes currently includes 23 species and is characterized by the following features (
Alloptes chionis Atyeo & Person, 1967: 98, figs 1–4; 1970: 129–130, figs 15–17.
Alloptes (Conuralloptes) chionis:
3 males and 3 females (NIBR No. NIBRIV0000887152–NIBRIV0000887157) from Chionis albus (Gmelin) (Charadriiformes, Chionidae), Antarctica, King George Island, Barton Peninsula, 62°14'3"S, 58°46'56"W, 13 January 2016, coll. Han Y.-D.
Alloptes (Conuralloptes) chionis was described from specimens collected from Ch. minor (type host) on Heard Island and was also found on Ch. albus from the Gaston Islands (Atyeo and Person 1967). When this mite was described, the genus Alloptes had not yet been subdivided into subgenera.
The subgenus Sternalloptes includes about 20 species and is characterized by the following features (
Male holotype (NIBR No. NIBRIV0000887158), 3 males and 4 females paratypes (NIBR No. NIBRIV0000887159–NIBRIV0000887164) from Stercorarius maccormicki Saunders (Charadriiformes, Stercorariidae), Antarctica, King George Island, Barton Peninsula, 62°14'2"S, 58°46'20"W, 2 January 2016, coll. Han Y.-D.
Male (Figs
Female (Figs
Among 18 previously known species in the subgenus Sternalloptes (
The comparative material of A. (S.) catharacti used here to illustrate morphological differences was collected from the same host species, S. maccormicki, at Jangbogo station, Terra Nova Bay, Antarctica, in 2016, by Ji-Yong Lee.
The specific name refers to the geographical range of the type host.
Subfamily Bonnetellinae Atyeo & Gaud, 1981
Subgenus Scutomegninia Dubinin, 1951
Scutomegninia phalacrocoracis: Atyeo & Peterson 1967: 100, figs 5–8; 1970: 150, figs 68–70.
Scutomegninia subantarctica Mironov, 1990: 53, nom. nudum.
Scutomegninia (Scutomegninia) subantarctica:
1 male and 3 females (NIBR No. NIBRIV0000887165–NIBRIV0000887168) from Leucocarbo bransfieldensis (Murphy) (Suliformes, Phalacrocoracidae), Antarctica, King George Island, Barton Peninsula, 62°14'4"S, 58°46'52"W), 8 January 2016, coll. Han Y.-D.
Mites of the genus Scutomegninia, collected from the Imperial Shag, Leucocarbo atriceps (King) (= Phalacrocorax atriceps) in Maipo Island (Buls Bay on Brabant Island, Palmer Archipelago, Antarctica) by
Scutomegninia (S.) subantarctica belongs to the phalacrocoracis group (species associated with Phalacrocoracidae and Anhingidae), and it is most similar to S. (S.) pygmaea Mironov, 1990. It differs from S. (S.) pygmaea and other species of the phalacrocoracis group by the following combination of characters in males: the terminal ends of the interlobar membrane have a small spine-like process; the lateral adanal shields have acute posterior ends, while the medial adanal shields have the posterior ends bluntly rounded; the anteromedial ends of adanal apodemes are rounded; setae s of tarsus III are spine-like, strongly attenuate apically, and bear two small denticles; the terminal cleft is 1.8–2 times longer than wide; and the incision in the interlobar membrane extends to the level of setae h2 (
Zachvatkinia hydrobatidii
Dubinin, 1949: 219, figs 9b, 10b; 1952, 256;
3 males and 3 females (NIBR No. NIBRIV0000887169–NIBRIV0000887174) from Oceanites oceanicus (Kuhl) (Procellariiformes, Oceanitidae), Antarctica, King George Island, Barton Peninsula, 62°14'15'S, 58°46'28"W, 9 January 2016, coll. Han Y.-D.
Zachvatkinia hydrobatidii was described by
Zachvatkinia stercorarii
Dubinin, 1949: 227, fig. 12, nom. nudum, 1952: 255, figs 1, 2;
3 males and 3 females (NIBR No. NIBRIV0000887175–NIBRIV0000887180) from Stercorarius maccormicki Saunders (Charadriiformes, Stercorariidae), Antarctica, King George Island, King Sejong station, Barton Peninsula, 62°14'2"S, 58°46'20"W, 21 January 2016, coll. Han Y.-D.
Zachvatkinia stercorarii was described by
Although Z. stercorarii and Z. isolata are associated with birds in the order Charadriiformes, these mite species belong to the puffini species group, which is characterized by a single dorsobasal spine on tarsus IV in males and setae d1 situated off the lateral hysteronotal shields in females (
Zachvatkinia stercorarii can be clearly distinguished from Z. isolata in having the following features: in males, the bases of genital setae g are adjacent (vs distant from each other); in females, the posterior margin of the prodorsal shield is just slightly convex (vs strongly convex), and the lateral margins of this shield have small incisions posterior to the bases of setae se (vs smooth and without incisions) (
Subfamily Ingrassiinae Gaud & Atyeo, 1981
The genus Ingrassia is the most specious genus within the subfamily Ingrassiinae, including 28 species up to now (
Male holotype (NIBR No. NIBRIV0000887181), 2 males and 3 females paratypes (NIBR No. NIBRIV0000887182–NIBRIV0000887186) from Chionis albus (Gmelin) (Charadriiformes, Chionidae), Antarctica, King George Island, Barton Peninsula, 62°14'13"S, 58°46'33"W, 11 January 2016, coll. by Han Y.-D.
Male (Figs
Sternum about half as long as total length of epimerites I (Fig.
Tarsi I, II each with short apicodorsal extension. Tibiae I, II with well-developed ventral spine-like processes (Fig.
Female (Figs
Sternum about half as long as epimerites I. Epigynum thick and is bow-shaped, 13–22 long, 58–64 wide, with tips bearing bases of setae 4b. Apodemes of oviporus long, their posterior ends long and narrow, encompassing bases of setae 4a (Fig.
Legs I, II as in the male. Legs IV with tarsus extending beyond posterior end of opisthosoma. Tarsi III, IV without apical spines, length of tarsi III, IV 60–61 and 72–74, respectively. Setae sRIII subequal to combined length of corresponding femur, genu, and tibia. Seta w of tarsus III and setae r, w of tarsus IV spiculiform (Figs
The new species Ingrassia chionis sp. nov. belongs to a group of species associated with the Charadriiformes and is characterized by a retrograde spine-like apophysis on femorogenu II in both sexes (
The specific name is taken from the generic name of the type host and is a noun in apposition.
This study was supported by Korea Polar Research Institute’s projects on the “Ecophysiology of Antarctic terrestrial organisms to reveal mechanisms of adaptation to changing environment” (PE21130). The authors wish to thank Ji-Young Lee (Chonnam National University, Korea) for sample collection. The permit for catching birds was officially approved the Korean Ministry of Foreign Affairs and Trade through the Korea Polar Research Institute.