Ozestheria rufa ( Dakin, 1914 )

Rogers, D. Christopher, 2020, Spinicaudata Catalogus (Crustacea: Branchiopoda)., Zoological Studies 59 (45), pp. 1-44 : 24-25

Ozestheria rufa ( Dakin, 1914) species inquirenda

= Cyzicus (Estheria) rufa Dakin, 1914

= Caenestheria rufa ( Dakin, 1914)

= Eocyzicus sp. Brtek, 1997

Comments: Australia: Western Australia ( Timms and Richter 2002). Based on two females and not collected since.

Eocyzicidae Schwentner, Rabet, Richter, Giribet, Padhye, Cart, Bonillo, and Rogers, 2020

= Caenestheriidae Daday, 1913b: 12 (pro partim)

= Baikalolkhoniinae Naganawa, 1999

= Baikalolkhoniidae Naganawa, 1999 New Combination

Diagnosis: (Modified from Rogers et al. 2017; and Schwentner et al. 2020a). Populations composed of males and females; amplexus is venter to venter. Rostrum typically sexually dimorphic. Rostrum subtriangular (usually females) to subquadrate (usually males) or rounded. Rostrum may or may not be armed with an apical spine (sometimes present in juveniles and rarely adults). Angle between rostrum and frons 170° to 190°. Occipital notch very shallow or absent. Occipital condyle low, rounded or absent, length half or less basal width. Carapace valve length ~1.5 times valve breadth (hinge to margin). Carapace growth line intervals smooth or ornamented (scarring from algae often mistaken for ornamentation). Carapace typically brown, occasionally black, sometimes with marginal setae. Clasper endopod apically with a transverse row of one to a few apical scales bearing a marginal fringe. Endite IV broadly transverse to cylindrical, bearing a dense, apical field of short spiniform setae. Thoracic segments smooth or with a central dorsoposterior projection and/ or set of spines or setae. Eggs attaching to prolonged exopods of thoracopods IX and X. Thoracopod epipods lacking a triangular lamella. Telson posterior margin posteriolateral spine rows confluent dorsally, with confluence not or slightly projecting. Each row has from six to 30 spines depending on species and gender. Females typically have more and smaller spines than males. Caudal filament originating between spine rows at fifth, sixth, or seventh spines from confluence. Caudal filament borne on projecting mound. Cercopods arcuate or straight. Cercopod with a dorsomedial longitudinal row of setae or spines on proximal 40 to 60%. Setae plumose and either long or short. Row terminates with single spine. Cercopod with subapical, dorsal cirrus, extending from 50 to 40% of cercopod length. Eggs smooth or with surface polygons.

Comments: Two genera are recognised. Naganawa (2001b) treated Eocyzicus as a junior synonym of Cyzicus , however this is not supported by molecular studies (Schwenter et al. 2009; Schwentner et al. 2020a).

Naganawa (1999) created Baikalolkhoniinae to accommodate a new species of cyzicid clam shrimp from Russia. Brtek (2002) elevated that taxon to family status with no explanation or justification.

Tiwari (1966) reported a rostral spine in some large adult E. bouvieri .