Corticacarus

Venter of idiosoma of maleCorticacarus argentinensis, from Goldschmidt & Ramírez Sánchez (2020). Belongs within: Hygrobatidae. Corticacarus is a genus of hygrobatid water mites with relatively laterally placed legs IV with the glands on coxae IV placed centrally, posterior to the suture between coxae III and IV, and with a ventral projection on the palpfemur. <==Corticacarus… Continue reading Corticacarus

Australiobates

Venter of femaleAustraliobates gomorus, from Goldschmidt & Ramírez Sánchez (2020). Belongs within: Hygrobatidae. Australiobates is a genus of hygrobatid water mites bearing a posterior process on the capitulum, found in Australasia, South Africa and South America. <==Australiobates Lundblad 1941 RFF05 |–A. cekalovici Besch 1964 RFF05 |–A. curtipalpis Cook 1988 RFF05 |–A. emalus Cook 1986 H98… Continue reading Australiobates

Aspidiobates

Aspidiobates sp., copyright Melissa Carew.Belongs within: Hygrobatidae. Aspidiobates is a genus of water mites found in Australasia and South America characterised by a dorsal shield of one large anterior platelet and multiple smaller posterior platelets, three or four pairs of genital acetabula, and legs without swimming hairs. <==Aspidiobates Lundblad 1941 RFF05 |–A. aethes Harvey &… Continue reading Aspidiobates

Omartacaridae

Venter of Omartacarus elongatus, from Cook (1963). Belongs within: Hygrobatoidea. The Omartacaridae are a group of interstitial water mites with a disjunct distribution in southern Asia, Australia and the Americas. Species have a soft integument, somewhat elongated idiosoma, all coxal plates grouped together with the medial edges of anterior coxal group noticeably longer than those… Continue reading Omartacaridae

Austraturus

Austraturus tumidipalpis, from Viets (1978).Belongs within: Aturidae. Austraturus is an Australian genus of aturid water mites with the dorsal shield divided into seven platelets, and with the pedipalp having several small ventral projections on the femur and paired ventral setae placed subdistally on the tibia. <==Austraturus Viets 1978 H98 |–A. concavus Cook 1986 H98 |–A.… Continue reading Austraturus

Axonopsella

Axonopsella misionum male, from Rosso de Ferradás (1995).Belongs within: Aturidae. Axonopsella is a genus of aturid water mites found in Australasia and South America. The dorsal plate is comprised of a single shield and projections from coxa IV cover the openings of legs IV. <==Axonopsella Lundblad 1930 RFF05 |–A. (Chilaxonopsella Cook 1988) RFF05 |    |–A. (C.)… Continue reading Axonopsella

Albia

Albia sp., from Water Mites of North America.Belongs within: Aturidae. Albia is a cosmopolitan genus of aturid water mites with the dorsal shield composed of a single plate but without projections covering the openings of legs IV. <==Albia Thor 1899 RFF05 |  i. s.: A. australica Cook 1986 H98 |         A. brokenensis Smit 1992 H98 |        … Continue reading Albia

Frontipodopsis

Frontipodopsis sp., from Goldschmidt et al. (2022). Belongs within: Hygrobatoidea. Frontipodopsis is a genus of water mites with a disjunct distribution in southern Eurasia, Australia and the Americas. They are characterised by a strongly laterally compressed idiosoma, and dorsoventrally expanded and laterally flattened segments on leg IV (Walter et al. 2009). Frontipodopsis Walter 1919 [Frontipodopsidae,… Continue reading Frontipodopsis

Stephanocrinidae

Stephanocrinus angulatus, from here. Belongs within: Crinoidea. The Stephanocrinidae are a group of crinoids known from the Middle Ordovician to the Upper Silurian, characterised by unique sausage-shaped cover plates and biserial arms (Moore et al. 1978). Characters (from Moore et al. 1978): Crinozoans with three circlets of regularly arranged thecal plates, without pores and infolds… Continue reading Stephanocrinidae

Hemistreptocrinida

Cup of Paractocrinus tuberculatus in (clockwise from left) lateral, base and summit view, from Moore et al. (1978). Belongs within: Crinoidea. The Hemistreptocrinida are an Ordovician group of small crinoids with plate circlets in the cups only slightly offset (Moore et al. 1978). Characters (from Moore et al. 1978, as Paractocrinidae): Small crinoid cups composed… Continue reading Hemistreptocrinida