Martensina, Savatenalinton, 2022

Savatenalinton, Sukonthip, 2022, Martensina thailandica gen. et sp. nov. a freshwater ostracod representing a new subfamily of Cyprididae, Martensininae subfam. nov. (Crustacea: Ostracoda) from Thailand, European Journal of Taxonomy 836 (1), pp. 1-22 : 3-4

Genus Martensina gen. nov.

urn:lsid:zoobank.org:act:1BC4102E-02A9-4178-AB04-12A71EF35C1B

Type species

Martensina thailandica gen. et sp. nov. (here designated).

Diagnosis

Cp large (length ca 1.5 mm). Rome organ on A1 present, A1 7-segmented, terminal segment very elongated.A2 natatory setae well developed, A2 sexually dimorphic with setae and claws on penultimate and terminal segments modified in male. Md-palp with very elongated penultimate segment. Mx1- palp with elongated terminal segment. Prehensile palp of T 1 in males 2-segmented and asymmetrical between left and right palps, T2 basal segment with d1 and d2 setae, penultimate segment divided, h2 claw sexually dimorphic with robust apical spinules in male. T3 distinctively 4-segmented, terminal segment with three long setae, g seta absent, basal segment with d1 and dp setae (d2 seta absent). CR well developed with Sp seta situated close to Gp claw, CR attachment well-developed with two distal branches. ms and ls large with widely rounded distal margins. Zenker organ with numerous spiny whorls and funnel-shaped at both ends.

Etymology

The genus is named in honor of Prof. Dr Koen Martens (The Royal Belgian Institute of Natural Sciences, RBINS) for his outstanding work on taxonomy of non-marine Ostracoda.

Remarks

Martensina gen. nov. is chiefly characterized by the absence of marginal septa, the presence of a Rome organ, the 2-segmented prehensile palps, the presence of d1 and d2 setae on the T2, the sexually dimorphic T2, the distinctive T3 terminal segment bearing three long setae, the well-developed CR on which the claw-like Sp seta inserts close to the Gp claw, the internal reticulated structure of the hemipenis and the funnel-shaped ends and numerous spiny whorls of the Zenker organ. The combination of these features has not yet been reported in any other genus of the Cyprididae .

Species included

Martensina thailandica gen. et sp. nov. (monospecific genus).

Distribution

Thailand (present study).