On Plesionika quasigrandis Chace, 1985 (Decapoda, Caridea, Pandalidae) from southwestern India

Notes on Plesionika alcocki (Anderson, 1896) and Plesionika narval (Fabricius, 1787) from the southern coast of India

“…The species P. alcocki Anderson, 1896 [7] which is widely distributed in the southwest coast off Arabian Sea and southeast Andaman Island off Bay of Bengal at the depth between 496 -1093 m [8][9][10] . Here we report the first record along the Tamil Nadu coast off Bay of Bengal in the lower depth range between 200 -300 m and on the species P. narval [11] a short technical note was recorded from southern India [4] . In particular, targeted deepsea shrimp fishing started in the early 1990s in the Indian EEZ.…”

“…The genera Plesionika contributes majorly to the commercial landing of deepsea shrimps from the southern coast of India. From the Indian waters, 15 species under the genera Plesionika are recorded, namely P. alcocki, P. bifurca, P. ensis, P. martia, P. ocellus, P. quasigrandis, P. unidens, P. sindoi, P. williamsi, P. adensameri and P. longicuda, P. narval, P. reflexa, P. semilaevis, P. persica [3][4][5][6] . The species P. alcocki Anderson, 1896 [7] which is widely distributed in the southwest coast off Arabian Sea and southeast Andaman Island off Bay of Bengal at the depth between 496 -1093 m [8][9][10] .…”

On Plesionika persica (Kemp, 1925) and P. reflexa Chace, 1985 (Crustacea: Decapoda: Pandalidae) from India

“…The high genetic difference of the Indian form from topotypic material of both P. ensis and P. reflexa, and the reduction or absence of epipods at the pereiopod III and IV may urge the separation of the Indian form as another species. As pointed out by Chakraborty et al (2015), however, species delimitation using COI data alone is still rather controversial for Plesionika. For example, the COI sequence divergences amongst seven Plesionika species from Northeast Atlantic and Mediterranean ranged from 2.5% to 18.3% (Matzen da Saliva et al 2013) while that of P. quasigrandis Chace, 1985 materials from India and the Philippines can be as high as 5.8-8.4% (Chakraborty et al 2015).…”

“…As pointed out by Chakraborty et al (2015), however, species delimitation using COI data alone is still rather controversial for Plesionika. For example, the COI sequence divergences amongst seven Plesionika species from Northeast Atlantic and Mediterranean ranged from 2.5% to 18.3% (Matzen da Saliva et al 2013) while that of P. quasigrandis Chace, 1985 materials from India and the Philippines can be as high as 5.8-8.4% (Chakraborty et al 2015). In views that P. ensis/reflexa have a very wide geographical range with highly variable morphological characters (Chan & Crosnier 1997;Fransen 2006) but no coloration difference (Fig.…”

Larval development to the first eighth zoeal stages in the deep-sea caridean shrimp Plesionika grandis Doflein, 1902 (Crustacea, Decapoda, Pandalidae)

“…Some of them are commercially important such as P. izumiae Omori, 1971, P. martia (A. Milne-Edwards, 1883), P. narval (Fabricius, 1787), and P. quasigrandis Chace, 1985 (Hayashi and Koike 1976; Holthuis 1980; Chilari et al 2005; Chakraborty et al 2015). Nevertheless, larval development in these shrimps has only been known in two species, namely P. edwardsii (Brandt, 1851) [zoea (hereafter with the abbreviation Z) I–VII; Landeira et al 2009a] and P. narval [ZI–V, decapodid; Landeira et al 2009b, Landeira et al 2014], since rearing of deep-sea shrimps and their larvae are generally very difficult (Landeira et al 2014).…”