Zercon hibernia Moraza, Arroyo & Bolger

Moraza, María Lourdes, Arroyo, Julio & Bolger, Thomas, 2009, Three new species of mites (Acari: Zerconidae) from canopy habitats in Irish forests, Zootaxa 2019, pp. 29-39: 34-36

publication ID

http://doi.org/ 10.5281/zenodo.186058

persistent identifier

http://treatment.plazi.org/id/038F6878-FFA4-3412-FCCB-FE52FF1AE7FB

treatment provided by

Plazi

scientific name

Zercon hibernia Moraza, Arroyo & Bolger
status

sp. nov.

Zercon hibernia Moraza, Arroyo & Bolger   , sp. nov.

( Figs 9–13 View FIGURES 9 – 13 )

Material examined Holotype. Female: Ireland, Co. Laois, Baunreagh, Sitka spruce ( Picea sitchensis   ) 85 year old plantation (~ 53 º 07' N, 7 º 34 ' W), from middle canopy, slide C 5 ME- 2, altitude: 360 m., 7 November 2005, deposited at MZUNA. Paratypes: 2 females, 4 males, same locality and date, collected in the canopy at different heights (females and one male deposited at MZUNA, 3 males deposited at UCD); 3 females, 2 males, Ireland, Dooary, Co. Laois, in a 17 years old Sitka spruce plantation (~ 52 º 57 ' N, 7 º 15 ' W), altitude: 260 m., 12 December 2007, in the tree canopy at different heights (2 females and all males deposited at MZUNA, 1 female at UCD); 7 females, Ireland, Co. Kerry, Rennadinna Wood ( Taxus baccata   ) in Killarney National Park (~ 52 º 02' N, 9 º 31 ' W), altitude 30 m., 6 July 2007, from canopy and moss occurring at different heights in the trees (4 deposited at UCD, 3 at MZUNA); 2 females, Ireland; Co, Kerry, Tomies Wood ( Quercus petreae   ) in Killarney National Park (~ 52 º 03' N, 9 º 35 ' W), altitude 60 m., 5 July 2007, from moss mats in the lower canopy, deposited at MZUNA; 2 females, Ireland, Co. Offaly, Kinnity oak ( Q. petraea   ) forest (~ 53 º 10 ' N, 7 º 26 ' W), from moss collected in the lower canopy, altitude 200 m., 2 August 2007 (deposited at MZUNA).

Diagnosis Anterior margin of ventri-anal shield with two pairs of setae. Dorsal fossae of similar size and appearance. Glands gdZ 3 (Po 3) situated between setal rows Z and S-, lateral to the line connecting setae Z 3 and Z 4. Setae J 1 –J 3, not reaching the bases of following setae, similar in length; J 4 and J 5 longer. Setae Z 1, Z 2 and Z 3 similar in length; setae Z 4 and Z 5 slightly longer. Seta r 3 thicker and with a serrate outline. All dorsal setae with 2–3 spines, sligthly bicarinate. Opisthonotal shield with distinct reticulation in the anterior region and pits in the posterior half. Peritreme bifurcate near stigma, anterior tip curved.

Description FEMALE. Length of idiosoma: holotype 590 (580–605 in 5 paratypes), width 430 (410–430). Length of podonotal shield: 315 (315–345). Length of opisthonotum: 275 (255–275) (N= 6).

Dorsum ( Fig. 9 View FIGURES 9 – 13 ). Podonotal shield with reticulate pattern; opisthonotal shield showing a reticulate pattern on anterior corners; central opisthonotum and posterior corners have small pits arranged in a reticulate pattern. Podonotum with 20 pairs of setae, setae variable in length ( Fig. 10 View FIGURES 9 – 13 ); setae s 1, z 2 and z 3 shorter than other podonotal, setae r 1 and r 3 on dorso-peritrematal shield. Gland openings distinct; gdj 2 (po 1) situated between s 1 and z 2; gdj 4 set on the line connecting j 4 and z 4; gds 4 postero-paraxial to insertion of setae s 4. Four pairs of podonotal lyrifissures. Opisthonotum with 20 pairs of setae: setal row J with 5 pairs; J 5 longest; setal row Z with five pairs of setae: Z 1, Z 2 and S 2 similar in length to J 1, Z 3 = S 3 and longer than Z 1; S 4 reaching beyond lateral margin of idiosoma and similar in length and shape to Z 3; Z 5 similar in length to S 5. Marginal setae S 1 and R 1 -R 6 not reaching beyond bases of following marginal setae, similar in shape to other marginal dorsal setae, smooth or slightly bicarinate (1–3 spines). Glands gdz 6 (Po 1) on line connecting setae z 6 and Z 1, glands gdZ 2 (Po 2) on line connecting setae S 1 and S 2; large glands gdJ 4 (Po 3) antiaxial to line connecting setae Z 3 and Z 4, and enlarged glands gdS 5 (Po 4) behind line connecting setae Z 5 and S 5. Dorsal opisthonotal fossae rounded, of general appearance, similar in size. Dorsal lyrifissures as in Fig. 9 View FIGURES 9 – 13 . Length of the opisthonotal setae and distance between setal bases within longitudinal I-, Z-, and S-rows as follows: J 1 – J 3 (35-37), J 4 - J 5 (45–48), Z 1 = Z 2 (33–36), Z 3 (47), Z 4 (53), Z 5 (49), S 1 (28–30), S 2 (38), S 3 (45), S 4 (45–48), S 5 (53), R (26–29); J 1 -J 2> J 2 -J 3 = J 3 -J 4> J 4 -J 5 (42), Z 1 -Z 2> Z 2 -Z 3 (53) <Z 3 -Z 4 <Z 4 -Z 5 (93), S 4 -S 5 (72); J 1 -J 1 = J 2 -J 2 <J 3 -J 3 = J 4 -J 4 <J 5 -J 5.

Venter ( Fig. 11 View FIGURES 9 – 13 ). Ventral chaetotaxy, adenotaxy, poroidotaxy and shape of ventral shields typical of the genus. Opistogastric soft cuticle smoothly striate. Sternal shield 93–100 long, 87 wide at level of setae st 2, posterior margin slightly concave. Sternal setae smooth and thin; st 1 11 long; and st 4 14–19 long; st 2, st 3 and st 4 longer (17–19). Anterior margin of ventri-anal shield with two pairs of setae; 8 pairs of thin and smooth pre-anal setae (17–28); setae JV 5 similar shape to other dorsal thickened setae, 43 long. Post-anal seta (30) smooth and longer than pre-anal ones (22). Anal valves with euanal setae and anal lyrifissures. Four gland openings gv 2 on rounded platelets, gv 3 conspicuous.

Peritreme with distinctive shape, clearly bifurcate and bent at posterior tip, anterior tip strongly curved back towards stigma; peritrematal glands in distinctive area ( Fig. 12 View FIGURES 9 – 13 ). Tectum as in Fig. 13 View FIGURES 9 – 13 .

MALE. Length of idiosoma 440–485, width 320–340. Dorsum similar to female. Sternogenital shield fused with endopodal elements between coxae II –III and III –IV; with five pairs of setae (st 1 -st 5), and a poorly sclerotized band between setae st 1 and st 2. Gland openings gv 2 located on platelets, similar to female. Ventrianal shield with two pairs of setae in anterior margin. Peritreme shape similar to female but not so strongly curved in the anterior tip.

Notes The new species is closely related to Z. guttulatus Athias-Henriot   , Z. subguttulatus Moraza   , Z. arcuatus Trägårdh   and Z. zelawaiensis Sellnick. These   five species have the glands Po 3 in position gdZ 3, medially along the line connecting Z 3 and Z 4 or slightly outwards towards the S setae row. However, the length and/or structure of the opisthonotal setae are different.

Zercon subguttulatus   has setae Z 3 -Z 5, S 4 and S 5 with flattened and hyaline rounded tips and the body size is clearly smaller, while Z. guttulatus   has setae J 3 -J 5 different in length (longer, reaching the bases of the following setae) and structure (hyaline rounded tips). Neither of these species has the characteristic peritremal structure of Z. hibernia   . Zercon zelawaiensis   also has setae of series S with different lengths, but seta S 2 is remarkably shorter than in Z. hibernia   , up to 5 times shorter than S 5, which does not happen in the new species. Another difference is that seta Z 4 is extremely long in Z. zelawaiensis   .

The most similar species, Z. arcuatus   , differs mainly from the new species in the structure of the dorsal setae, which are needle like. The absence of pits in the opisthonotal shield is another difference. The characteristic arcuate and branched peritreme are also distinctive in the new species.

Etymology The species name refers to Hibernia   , the old Roman name for Ireland.

The species of Zercon   that occur in Britain may be separated in the following key. Details of the geographical distribution of most of these species can be found in Skorupski & Luxton (1996) and Luxton (1998).

UCD

University of California, Davis