Ghatiana, PATI & SHARMA, 2014

Pati, Sameer K. & Thackeray, Tejas, 2021, Five new species of freshwater crabs of the genera Ghatiana Pati & Sharma, 2014 and Sahyadriana Pati & Thackeray, 2018 from India (Decapoda: Brachyura: Gecarcinucidae), Zoosystema 43 (26), pp. 627-647 : 636

KEY TO SPECIES OF GHATIANA PATI & SHARMA, 2014 (modified from Pati & Thackeray 2018)

1. Adult carapace proportionately broader (CW/CL = 1.6-1.9) ....................................................................... 2

— Adult carapace proportionately narrower (CW/CL = 1.2-1.5) ..................................................................... 3

2. Major chela of adult male with relatively slenderer palm; G1 medially distinctly curved outwards, with relatively shorter terminal segment, c. 0.3 times length of subterminal segment ............................................................ .............................. Ghatiana basalticola (Klaus, Fernandez & Yeo, 2014) [KARNATAKA: Belgaum district].

— Major chela of adult male with relatively stouter palm; G1 almost straight, with relatively longer terminal segment, c. 0.5 times length of subterminal segment ........................................................................................... ............................................. Ghatiana pulchra Pati & Thackeray, 2018 [MAHARASHTRA: Satara district].

3. Male pleonal somite 6 longer than broad ..................................................................................................... 4

— Male pleonal somite 6 as long as broad or slightly broader .......................................................................... 7

4. Carapace with gently convex lateral margins; G1 subterminal segment basally broad ..................................... ..................................... G. rouxi n. sp. [ GOA: North Goa district; KARNATAKA: Uttara Kannada district].

— Carapace with strongly convex lateral margins; G1 subterminal segment basally narrow ............................. 5

5. First, second maxillipeds with short flagellum on exopod; G1 medially distinctly curved outwards, with terminal segment almost straight; vulvae in adult positioned apart from each other (VD/SW = c. 0.3), suborbicular in shape ..................................... G. rathbunae Pati & Thackeray, 2018 [MAHARASHTRA: Kolhapur district].

— First, second maxillipeds with long flagellum on exopod; G1 almost straight, with terminal segment distally gently curved inwards; vulvae in adult relatively closely positioned (VD/SW = c. 0.2), subovate in shape .... 6

6. Epibranchial tooth visible as distinct notch; branchial regions rugose; frontal margin some distance from anterior margin of epistome, exposing antennular fossae; G1 terminal segment relatively shorter, c. 0.4 times length of subterminal segment; vulva in adult relatively smaller, occupying c. 0.3 times length of S6, positioned some distance from S5/S6 ................... G. botti Pati & Thackeray, 2018 [MAHARASHTRA: Sindhudurg district].

— Epibranchial tooth indistinct; branchial regions smooth; frontal margin very close to anterior margin of epistome, hiding antennular fossae; G1 terminal segment relatively longer, c. 0.5 times length of subterminal segment; vulva in adult relatively larger, occupying c. 0.5 times length of S6, positioned close to S5/S6 ........................ ............................... G. splendida Pati, Thackeray & Khaire, 2016 [MAHARASHTRA: Sindhudurg district].

7. Frontal margin very close to anterior margin of epistome, hiding antennular fossae; G1 sigmoid-shaped or medially gently curved outwards ...................................................................................................................... 8

— Frontal margin some distance from anterior margin of epistome, exposing antennular fossae; G1 almost straight ........................................................................................................................................................ 9

8. Major chela of adult male with relatively slenderer palm, and gently concave ventral margin of fixed finger and distal half of palm; ambulatory legs relatively longer (P3 length/CL = c. 2.5); G1 terminal segment medially distinctly curved inwards ........... G. atropurpurea Pati, Thackeray & Khaire, 2016 [ GOA: South Goa district; MAHARASHTRA: Kolhapur and Sindhudurg districts].

— Major chela of adult male with relatively stouter palm, and strongly concave ventral margin of fixed finger and distal half of palm; ambulatory legs relatively shorter (P3 length/CL = c. 2.0); G1 terminal segment straight ................................................... G. hyacintha Pati & Sharma, 2014 [MAHARASHTRA: Kolhapur district].

9. Male pleonal somite 6 quadrate, as long as broad; G1 with relatively slenderer terminal segment and relatively stouter subterminal segment; vulva in adult positioned some distance from S5/S6 ......................................... ..................................................... G. aurantiaca Pati & Sharma, 2014 [MAHARASHTRA: Raigad district].

— Male pleonal somite 6 subquadrate, slightly broader than long; G1 with relatively stouter terminal segment and relatively slenderer subterminal segment; vulva in adult positioned close to S5/S6 .......................................... ............................................................ G. durrelli n. sp. [MAHARASHTRA: Kolhapur and Satara districts].