Paralimnadia Sars, 1896b

Rogers, D. Christopher, 2020, Spinicaudata Catalogus (Crustacea: Branchiopoda)., Zoological Studies 59 (45), pp. 1-44 : 15

Paralimnadia Sars, 1896b , sensu Rogers et al.,

2012, Timms and Rogers, 2020

= Eulimnadia pro partim. Sayce 1903; Wolf 1911; Dakin 1914; Henry 1924; Richter & Timms 2005 = Limnadia pro partim. Brtek 1997

Diagnosis: (modified from Rogers et al. 2012). Populations composed of males and females; male amplexes female on posterior carapace margin, keeping body in line, single file, behind female. Rostrum variable, from blunt to acute, long or short, in both sexes. Angle between rostrum and frons 80° to 100°. Occipital notch and condyle absent. Frontal organ pedunculate. Frontal organ length 0.5 to 1.5 times distance between base of frontal organ and base of ocular tubercle. Carapace dorsal margin smooth, lacking carinae, hinge line arcuate, rarely sinuate. Carapace intervals smooth. Umbone absent. Carapace with or without pigmentation. Muscle scar angle 10 to 80 degrees from normal. Thoracic segments with dorsoposterior ridge margined with spines or setae. Male first two thoracopods with endite V bearing apical suctorial organ. Endite IV typical for family, although sometimes broadly transverse or bearing dense, apical setal field. Eggs attaching to prolonged exopods of thoracopods IX and X, X and XI, or XI and XII. Telson without spiniform projection on ventroposterior angle, anteriad of cercopod base. Telson posterior margin spine rows confluent dorsally, with confluence projecting or not. Each row averaging five to 25 spines. Caudal filament originating between spine rows at third, fourth, or fifth spines from confluence. Cercopods arcuate, occasionally sinuate. Cercopod medial surface with longitudinal row of setae along proximal 40 to 60%. Setae plumose, sometimes long or short. Setal row terminates with one spine. Cercopod with subapical, dorsal cirrus, extending 10 to 50% of cercopod length. Eggs 100 to 170 μm in diameter, spherical to subspherical in shape. Eggs with large rectilinear polygonal depressions separated by ridges, occasionally with lamellar or setaform spines at polygon ridge line confluences.

Comments: The type species for the genua is Limnadia stanleyana King, 1855 , by monotypy. Recent work has helped us in separating this genus from Eulimnadia ( Timms and Rogers 2020) . The genus occurs in Australia, New Zealand, and the Celebes Islands.

Attributed Species