A new species of Bogidiella ( Crustacea : Amphipoda : Bogidiellidae ) from bore wells in Andhra Pradesh , Southern India

A new amphipod species of Bogidiellidae Hertzog, 1936 is described and illustrated based on specimens collected from bore wells in the state of Andhra Pradesh, Southern India. The new species is closely related to those belonging to a group of Bogidiella species with inner rami of pleopods reduced or absent. Bogidiella totakura sp. nov. differs from all the other species in the group mainly by the shape, size and ornamentation on gnathopods and telson. This is the second Indian species of Bogidiella.


MATERIAL AND METHODS
The material examined was collected by plankton net, from bore wells in the state of Andhra Pradesh, Southern India.The collections were made on 24 April 2008, 26 June 2009, and 5 January 2010.The specimens were found in the three collections, totaling 21 specimens.Specimens are housed at the Crustacea Collection of the Departamento de Zoologia, Instituto de Biologia, Universidade Federal do Rio de Janeiro (DZUFRJ), and at the National Collection of the Zoological Survey of India (ZSI), Kolkata, preserved in 70% ethanol.Appendages and mouthparts were dissected and mounted on glass slides with gelatin-glycerol.Drawings were made under an optic microscopy (Motic BA-310) with camera lucida, and digitally prepared with CorelDraw X5, following a protocol based on COLEMAN (2003).All drawings were made based on the holotype DZUFRJ 4933.The setal/spine classification adopted in this paper follows WATLING (1989).Nomenclature of gnathopod palm is based on POORE & LOWRY (1997).
A new species of Bogidiella (Crustacea: Amphipoda: Bogidiellidae) from bore wells in Andhra Pradesh, Southern India André R. Senna

Figs 1-22
Diagnosis.A stygomorphic bogidiellid amphipod with accessory flagellum 3-articulate, article 3 reduced, total length of accessory flagellum as long as articles 1 and 2 of flagellum combined; left mandible, molar broad, right mandible, molar absent; pereopod 5, slightly short, about 0.9 times the pereopod 6 and half as long as pereopod 7; telson about 1.3 times wider than long, notched at about 1/3 of its length, apically truncate, with 1 apicolateral cusp in each lobe and 1 subapical stout seta on lateral margins.
Maxilla 1, inner plate suboval, about half the length of outer plate; outer plate subrectangular, bearing 6 simple setae on apical margin; palp 2-articulate, article 2 tapering distally, with 1 apical and 1 subapical simple seta.Maxilla 2, short, both plates narrow, subequal in length, outer plate with 4 apical slender setae, inner plate with 4 apical slender setae plus 1 elongate seta near distolateral corner.Left mandible, molar broad, semitriturative; accessory setal row consisting of 2 small curved simple setae; lacinia mobilis present, well developed, broad and apically multi-cuspidate; incisor multi-cuspidate, one of the cusps more developed and acute than others; palp 3-articulate, article 1 short, about 1.8 times wider than long, with a dorsal long slender seta, article 2 slightly robust, about 2.2 times longer than wide, and about 1.8 times longer than article 3, ventral margin convex, with a single slender seta, article 3 subrectangular, apically truncate, with 2 apical and 1 subapical slender setae.Right mandible subequal to left mandible, but molar absent, and article 1 of palp about as long as wide, without setae.Upper lip and lower lip in common with characteristics of the genus.Maxilliped, inner and outer plates short; inner plate suboval, with 1 apical and 1 subapical setae, and 3 distal setules; outer plate slightly elongate, with 1 seta and 2 setules distally; palp 4-articulate, stout, article 2 with 2 nodules, each with an apical long seta, about 1.6 times longer than article 3, article 4 tapering distally, inner margin concave and setulose, claw present.
Gnathopod 1, coxa subrectangular, about twice as long as deep; basis robust, about 2.4 times longer than wide, poste-riorly produced and convex, with 1 distal slender seta, anterior margin almost straight, naked; ischium, posterior margin with a distal slender seta; merus subtriangular, twice as long as deep, posterior margin setose, posterodistal corner bearing a long stout seta; carpus, about 1.6 times deeper than long, with well developed posterior lobe bearing 2 long and 1 small apical setae, posterior margin with 2 parallel long setae between basis of posterior lobe and articulation with propodus; propodus suboval, about 2.4 times longer than carpus, and about 1.8 times longer than deep, palm acute, sinuous, about 1.5 times longer than posterior margin, bearing 2 marginal slender setae and 1 displaced slender seta near the palmar corner, the latter defined by small stout seta, posterior margin with a distal stout seta; dactylus curved, long, as long as palm, bearing a single slender seta at the outer margin.Gnathopod 2, coxa small, subtriangular, about twice as long as deep; basis suboval, about 2.6 times longer than wide, anterior and posterior margins naked; merus subrectangular, about 1.2 times longer than wide, with 1 slender seta at the posterodistal corner; carpus subtriangular, about 1.3 times longer than wide, anterior margin naked, posterior margin convex, with 2 slender setae; propodus suboval, about 1.8 times longer than wide, anterior margin slightly convex, naked, anterodistal corner with 2 slender setae, palm extremely acute, bearing 4 stout setae, three of them attached to inner face of propodus, and another one to lateral face, palm about twice longer than posterior margin, palmar corner defined by a stout seta; dactylus curved, stout, about half as long as palm, without setae.
Pleopods 1-3 similar in shape and size, without inner ramus, outer ramus reduced in length.Epimeral plates 1 to 3 posteriorly produced and rounded, ventral and posterior margins naked.Uropod 1, peduncle subrectangular, about 2.9 times longer than wide, subequal in length to peduncle of uropod 2, inner margin with 1 proximal stout seta, posterior margin with 1 distal stout seta; outer ramus slightly longer than inner ramus, about half length of peduncle, with 2 apical stout setae, 1 long and 1 short, and 1 subapical stout seta; inner ramus 1.25 times longer than outer ramus, about 0.8 times the peduncle length, apically truncate, bearing 3 apical setae, 1 elon- ZOOLOGIA 30 (4): 451-457, August, 2013 gate and 2 short; outer ramus apically obtuse, bearing 3 apical setae, 1 elongate and 2 short.Uropod 2, peduncle about 2.5 times longer than wide, dorsal margin with 1 distal seta; inner ramus about 1.3 times longer than outer ramus, subrectangular; outer ramus bearing 1 elongate and 2 small setae apically.Uropod 3, peduncle about twice longer than wide, dorsal margin with 1 distal stout seta, ventral margin with 1 distal stout seta; rami elongate, subequal in length, about 1.8 times longer than peduncle; outer ramus with a set of 3 small stout setae at its mid-length, apical margin with 7 setae of variable length; inner ramus, dorsal margin with 2 long stout setae, apical margin with 6 setae of variable length.Telson flattened and mobile, about 1.3 times wider than long, notched at about 1/3 of its length, apically truncate, with 1 apicolateral cusp in each lobe and 1 subapical stout seta on either lateral margin.Etymology.The name of species is dedicated to Mr. V.R. Totakura, a promising young researcher and a student of Y.R.R., who was the first to collect the sample of the new species.
Compared to Bogidiella vomeroi Ruffo & Vigna Taglianti, 1977, the new species can be recognized by (characters of B. vomeroi in parentheses): gnathopod 2, palm extremely acute and palmar corner defined by a stout seta (palm slightly acute and palmar corner defined by the angle between palm and posterior margin); uropod 3, rami about 1.8 times longer than peduncle (2.2 times longer than peduncle); telson notched at about 1/3 of its length, apically truncate, with 1 apicolateral cusp on each lobe (distal margin deeply concave, lobes apically rounded).