Limnesia (Limnesia) elongata, Smit, 2022

Smit, Harry, 2022, New records of water mites of the family Limnesiidae Thor from Australia (Acari: Hydrachnidia), with the description of seven new species, Acarologia 62 (1), pp. 193-222 : 196-198

publication ID 10.24349/yu9v-w0lf

persistent identifier

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scientific name

Limnesia (Limnesia) elongata

sp. nov.

Limnesia (Limnesia) elongata sp. nov.

Zoobank: 438702C7-2E70-4B3A-A155-D740227A7500 ( Figure 2 View Figure 2 A-D)

µm, C-D = 50 µm.

Material examined — Holotype female, Booloumba Creek at picnic area, hyporheic, Conondale National Park, Queensland, Australia, 26°38.686′ S 152°39.013′ E, 144 m a.s.l, 19 Nov. 2014 ( QM). GoogleMaps

Diagnosis — Idiosoma elongated; posteromedial dorsal platelet absent; Cx-I medially separated; Cxgl-4 lying in a bifurcation of suture lines of Cx-III/IV; Vgl-1 posterior to Vgl-3; P4 with distinct setal tubercles.

Description — Female: Idiosoma elongated ( Figure 2A View Figure 2 ), dorsally 648 long and 348 wide, ventrally 689 long. Dorsum without a posteromedial dorsal platelet, postocularia on small platelets. Cx-I medially separated. Apodemes of anterior coxae short, extending onto Cx-III. Cxgl-4 lying in a bifurcation of suture line of Cx-III/IV; associated setae lying on Cx-III close to Cxgl-4 ( Figure 2B View Figure 2 ). Genital field 150 long, with three pairs of acetabula. Vgl-1 posterior to Vgl-3. Length of P1-5: 22, 54, 77, 124, 44. P2 with a peg-like seta, P4 ventrally with distinct setal tubercles, the posterior tubercle larger than the anterior tubercle; P5 slender ( Figure 2C View Figure 2 ). Length of I-leg-4-6: 120, 140, 130. Length of IV-leg-4-6: 142, 172, 168; terminal seta of IV-leg-6 94 long ( Figure 2D View Figure 2 ). All leg segments slender, swimming setae absent.

Remarks — The only two Australian Limnesia species without swimming setae and with little dorsal sclerotization are L. ugava Cook, 1986 and L. brinvoza Cook, 1986 . The new species differs from L. ugava in the medially separated Cx-I, from L. brinvoza in the absence of the small dorsalia, the elongated idiosoma and more slender palp segments (especially P2 and P3).


Queensland Museum