Iphidozercon walteri, Gwiazdowicz & Halliday, 2008

Gwiazdowicz, D. J. & Halliday, R. B., 2008, The Australian species of Iphidozercon (Acari: Ascidae), Zootaxa 1921, pp. 47-68: 62-66

publication ID

1175­5334

persistent identifier

http://treatment.plazi.org/id/03CBC36B-FFC8-FFBF-44A1-FF62FF6DFDE8

treatment provided by

Felipe

scientific name

Iphidozercon walteri
status

sp. nov.

Iphidozercon walteri   sp. nov.

( Figs 25–32)

Material examined. Holotype. Female. Australia, Victoria. Lerderderg River, Blackstone , 4 October 1991, streamside soil, D.E. Walter. In ANIC   . Paratypes. Queensland. 2 females, Bunya Mts National Park, Barker Creek track, 21 August 2003, dry sclerophyll, soil & litter, F. Beaulieu, UQIC #93630 View Materials , 93631 View Materials   ; 1 female, Gambubal Forest Station , 27º08'S, 152º09'E, 20 January 2003, sclerophyll forest, soil & litter, F. Beaulieu, UQIC #93642 View Materials GoogleMaps   ; 2 females, Brisbane Forest Park, Tenison Woods Mtn , 27º17'S, 152º45'E, 26 August 2003, dry sclerophyll, Asplenium   , ground litter, F. Beaulieu, UQIC #93655 View Materials GoogleMaps   ; 1 female, Peter's Ck, north of Conondale National Park , 26º41'S, 152º36'E, 13 July 1995, rainforest litter, D.E. Walter, UQIC GoogleMaps   Reg. # 91905   ; 1 female, Miala National Park, Mt. Glorious, Greene’s Falls , 6 October 1995, leaf litter, D.E. Walter, UQIC   Reg. # 91919   ; 2 females, Fraser Island , 20 August 1991, rainforest litter, D.E. Walter   ; 1 female, Lamington National Park, Border Track, 1.4 km from O’Reilly's , 28º14'S, 153º09'E, 9–10 July 2003, Asplenium australasicum   litter, F. Beaulieu, UQIC #93638 View Materials GoogleMaps   ; 2 females, Lamington National Park, Border Track, 1.5 km from Binna Burra ( Paweena ), 28º12'S, 153º11'E, 26–27 July 2003, ex Asplenium australasicum   litter, F. Beaulieu, UQIC GoogleMaps   Reg. #93653   ; 11 females, 1 male, Lamington National Park, Daves Creek Circuit, 28º13'S, 153º12'E, 15 July 2002, rainforest/sclerophyll ecotone, soil & litter, F. Beaulieu, UQIC #93639 View Materials , 93640 View Materials , 93641 View Materials GoogleMaps   ; 3 females, Lamington National Park, Tullawalal Track ( Binna Burra ), 28º12'S, 153º11'E, 21 July 2002, beech forest, soil & litter, F. Beaulieu, UQIC #93644 View Materials , 93645 View Materials GoogleMaps   ; 4 females, 1 male, Lamington National Park, Gwongoorool Pool Track , 28º12'S, 153º11'E, 21 July 2002, wet sclerophyll, soil & litter, F. Beaulieu, UQIC #93646 View Materials GoogleMaps   ; 3 females, Lamington National Park , unnamed track, 28º12'S, 153º11'E, 24 October 2002, sclerophyll, soil, F. Beaulieu, UQIC #93650 View Materials GoogleMaps   ; 4 females, 1 male, Lamington National Park, Duck Creek Road, 28º13'S, 153º09'E, 1 June 2002, rainforest/woodland transition, sclerophyll, soil & litter, F. Beaulieu, UQIC #93651 View Materials GoogleMaps   . Tasmania. 4 females, 1 male, Warra LTER   site, 43º09'S, 146º71'E, 1 October 2003, ex Eucalyptus obliqua   , wet sclerophyll forest, rainforest understorey, soil & litter, F.Beaulieu; 1 female, Weldborough Pass , 41º10'S, 147º54'E, 1993, Nothofagus   litter, D.E. Walter, Greenslade et al., UQIC # 91926 View Materials GoogleMaps   . Victoria. 3 females, 1 male, same data as holotype. (in UQIC)   .

Description. Female. Dorsal idiosoma. Dorsal shield oval, length 360 µm, width 250 µm ( Fig. 25). Margins of shield separated from central part of shield by a line extending from setae z1 to Z5; marginal strip ornamented with transverse lines, bending around slightly onto ventral surface. Central area of shield between setae z1, j4, j5, j6, z1', j4', j5', j6' with colliculate-granulate ornamentation. Posterior of shield with tuberculate ornamentation behind setae j6, granulate ornamentation behind J2, and smooth behind J4. Setae j1, s1, s2 each 15 µm long, fine, smooth and pointed, located on ventrally curved part of shield. All other setae smooth and pointed, slightly widened at base, approximately 30 µm long, except J5 slightly shorter (20 µm), and Z5 slightly longer.

Ventral idiosoma ( Fig. 26). Tritosternum with trapezoidal base and finely pilose laciniae, length of base 20 µm, laciniae 30 µm. Sternal shield rectangular, 60 x 40 µm; setae st1-st3 smooth and pointed, length 15 µm. Metasternal setae st4 length 15 µm. Genital shield small and narrow, length 60 µm, rounded posteriorly. Genital setae st5 15 µm long. Anal shield relatively large, 55 µm long, 70 µm wide. Para-anal setae 15 µm long, post-anal seta 20 µm, cribrum distinct. Stigmata at level of coxae IV; peritrematal shields wide, with weak posterior lineate ornamentation. Opisthogastric integument behind coxae IV with one pair of oval metapodal plates. Opisthogastric setae ZV1 15 µm long, JV2 25 µm, others approximately 20 µm.

Gnathosoma   . Hypostome with horn-like corniculi and four pairs of setae ( Fig. 27). Anterior setae h1 longest, 30 µm, internal seta h3 (20 µm) and palp coxal seta (25 µm) shorter, external seta h2 shortest, 10 µm. Seven transverse rows of hypostomal denticles present, number of denticles per row (anterior to posterior) 14, 15, 20, 21, 21, 18, 17. Chelicera typical for genus, fixed digit and movable digit each with three teeth ( Fig. 28), other details of chelicera not visible in available specimens. Tectum with central prong longest, its distal end club-like and denticulate, lateral prongs shorter, with denticulate outer margins ( Fig. 29). Palp tarsal claw with two unequal tines ( Fig. 31).

Legs. Length of legs: I, 225 µm, II, 200 µm, III 195 µm, IV 210 µm. Tarsus II to IV each with the dorsoproximal setae ad 2 and pd 2 short and straight ( Fig. 30). Setation of genua I-II-III-IV: 12-10-7-7; tibiae I-II-III- IV: 12-9-7-7 ( Fig. 32).

Etymology. This species is named in honour of our colleague David Evans Walter, who collected many of the specimens examined here, and who has made many other important contributions to acarology.

Notes. The peritreme, peritrematal shield, and anal shield of I. walteri   are similar to those of I. gibbus   , but these two species may be distinguished in several ways. The posterior half of the dorsal shield of I. walteri   is not strongly ornamented, but strongly sclerotised specimens have some tuberculate and granulate sculpture. The posterior half of the dorsal shield of I. gibbus   sometimes has a delicate, reticulate sculpture. The dorsal shield of I. walteri   has a distinctive sculpture around the edges, while that of I. gibbus   has a distinct elevation in the central section of the shield. Also, the dorsal setae in the J series in I. walteri   are longer than those of I. gibbus   .

ANIC

Australian National Insect Collection

UQIC

University of Queensland Insect Collection