Glossosoma (Glossosoma) sikkimense, Saini, Malkiat S., Parey, Sajad H. & Rathor, Vikram S., 2013

Saini, Malkiat S., Parey, Sajad H. & Rathor, Vikram S., 2013, Two new species of Glossosoma subgenus Glossosoma (Trichoptera: Glossosomatidae) from India, Zootaxa 3664 (3), pp. 392-396 : 393-396

Glossosoma (Glossosoma) sikkimense sp. nov.

( Figs. 9–16 , 18 )

Description. Entire body in alcohol dark brown. Length of each forewing 9.6–9.7 mm (n=2) and of each antenna 6.5–6.7 mm (n=2). Anal area of each forewing with oval callosity and D-shaped fold ( Fig. 18 , Pattern #3 of Morse & Yang 2004). Abdominal sternite VI process without indentation ( Figs. 13, 14 ); sternite VII process short and triangular ( Figs. 15, 16 ).

Male genitalia. Segment IX with pair of slender, apically rounded anterolateral processes subventrally ( Fig. 9 ); asymmetrical posteroventral process of segment IX triangular in lateral and ventral views ( Figs. 9, 11 ), half as long as side lobes of segment X. Upper half of apical margin of each lower part of each side lobe of segment X serrated and lower half rounded, completely fused with upper part of its side lobe of segment X ( Fig. 9 ). Apex of INF=inferior appendage; IX=segment IX; PAR=paramere; PH =phallicata; SLX=side lobe of segment X; VPIX=ventral process of segment IX.

each side lobe of segment X curved downward and slightly laterad ( Figs. 9, 10 ). Phallicata basally globular, long and slightly indented before apex with sinuously curved hook ( Fig. 12 ).

Differential diagnosis. This species closely resembles G. (G.) fissum Martynov 1935 and G. (G.) caudatum Martynov 1931 , but differs as follows: The apices of the side lobes of segment X in lateral view are strongly curved downward in G. (G.) sikkimense , whereas in G. (G.) fissum and G. (G.) caudatum the curvation is only moderate. The upper half and lower half of the apical margins of each lower part of each side lobe of segment X in G. (G.) sikkimense are serrated and rounded, respectively, whereas in G. (G.) fissum the apex is subtriangular in outline and without any serration and in G. (G.) caudatum it is roundly produced and without any serration. The apex of the phallicata in G. (G.) sikkimense has an upwardly curved hook, whereas in both the other species this hook is curved downwards. The sternite VI ventral process in ventral view in G. (G.) fissum is indented whereas in G. (G.) caudatum and G. (G.) sikkimense it is without any indentation; in G. (G.) caudatum the apex of this process is broader than its base whereas in G. (G.) sikkimense the base is slightly broader than the apex. The anal region of each forewing of G. (G.) fissum has an oval callosity and of G. (G.) caudatum has a Pattern #2 flap (Morse & Yang 2004), this region of each forewing of G. (G.) sikkimense has a pattern #3 flap.

Etymology. The species is named after the state in which the type locality is situated.

Material examined. Holotype 3; INDIA: Sikkim, Lachen, 3200 m, 24-v-2011, Collectors Parey & Pandher.

Paratype: Same collection data, 1 3. Material deposited in the Museum of the Department of Zoology and Environmental Sciences, Punjabi University, Patiala, India.

Female and Immature Stages. Unknown.

Figures

FIGURES 1 – 16. Glossosoma (Glossosoma) spp., male genitalia. 1 – 8, G. (G.) dirangense sp. nov.: 1, left lateral; 2, dorsal; 3, posteroventral process of segment IX, ventral; 4, phallic apparatus, left lateral; 5, abdominal sternite VI process, left lateral; 6, abdominal sternite VI process, ventral; 7, abdominal sternite VII process, left lateral; 8, abdominal sternite VII process, ventral. 9 – 16, G. (G.) sikkimense sp. nov.: 9, left lateral; 10, dorsal; 11, posteroventral process of segment IX, ventral; 12, phallic apparatus, left lateral; 13, abdominal sternite VI process, left lateral; 14, abdominal sternite VI process, ventral; 15, abdominal sternite VII process, left lateral; 16, abdominal sternite VII process, ventral.

FIGURES 17 – 18. Right forewings of Glossosoma (Glossosoma) spp., dorsal. 17, G. (G.) dirangense sp. nov.; 18, G. (G.) sikkimense sp. nov.