Paralimnadia datsonae, Timms & Rogers, 2020

Timms, Brian V. & Rogers, D. Christopher, 2020, Fig. 5 in Paralbunea dayriti, Zoological Studies (Zool. Stud.) 59 (38), pp. 1-10 : 6

Paralimnadia datsonae comb. nov.

= Eulimnadia datsonae Timms, 2015: 445–447 , Figs. 4 –5

Comments: This species lacks a true spiniform subcercopodal process, instead having a triangular projection covered with denticulae. Furthermore, the cercopod spine is placed at about 35% of the cercopod length, there are 11 antennomeres on each flagellum, mating is in line and sex ratios are approximately 1:1 ( Table 1), all Paralimnadia characteristics. In addition, there is a robust hamulus projecting at a right angle from the endite corm IV, with its length 0.5x the apical club diameter ( Fig. 4D in Timms 2016b). Specimens from Jurien Bay, WA, are slightly different (BVT unpublished data). Significantly, there is variation in the ventroposterior area of the telson, so that it varies from rounded to somewhat triangular and always without denticles, there are 12 antennomeres on each flagellum and the hamulus is even more protruding and is slightly curved distally. The cercopod setae are absent, and the spine is small, placed midlength, and in females the cercopod is apparently geniculated. It is assumed that the nearly inerm geniculate cercopod is aberrant in this population.

Figures

Fig. 4. Subcercopodal projection (and variation), left lateral view, among non-Australian Eulimnadia species. A, E. agassizii; B, E. astraova; C, E. brasiliensis; D, E. braueriana; E, E. chaperi; F, E. colombiensis; G, E. cylindrova; H and I, E. diversa; J and K, E. folisimilis; L, E. geayi; M, E. graniticola; N, E. michaeli; O, E. magdalensis; P, E. ovisimilis; Q, E. texana.