Spiralothelphusa Bott 1968
Creators: name: Pati, Sameer K.
name: Mandal, Sudipta
name: Jaiswal, Deepa
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Decapoda
Gecarcinucidae
Spiralothelphusa

description: Illustrated key to the species of Spiralothelphusa Bott, 1968
1. G1 with longitudinally less strongly twisted (half turn) terminal segment and distal portion of subterminal segment (Fig. 7A) .......................................................................................................... 2
– G1 with longitudinally more strongly twisted (full turn) terminal segment and distal portion of subterminal segment (Fig. 7B) .......................................................................................................... 5
2. G1 tip gently curved upwards (Fig. 7C); G1 non-twisted portion with gently curved outer margin (Fig. 7C)...................................................................... Spiralothelphusa hydrodroma (Herbst, 1794)
– G1 tip almost straight to gently hooked downwards (Fig. 7D–F); G1 non-twisted portion with strongly or sharply curved outer margin (Fig. 7D–F)........................................................................ 3
3. Male telson with gently concave lateral margins (Fig. 7G); G1 non-twisted portion with sharply curved outer margin (Fig. 7D).......................................... Spiralothelphusa senex (Fabricius, 1798)
– Male telson with straight lateral margins (Fig. 7H–I); G1 non-twisted portion with regularly curved outer margin (Fig. 7E–F) ................................................................................................................... 4
4. Male pleonal somite 6 relatively narrower, proximal width circa 1.3 times medial length (Fig. 7H); male telson equal in length to male pleonal somite 6 (Fig. 7H); G1 non-twisted portion with relatively less strongly convex outer margin (Fig. 7E)........................... Spiralothelphusa fernandoi Ng, 1994
– Male pleonal somite 6 relatively broader, proximal width circa 1.6 times medial length (Fig. 7I); male telson slightly longer than male pleonal somite 6 (Fig. 7I); G1 non-twisted portion with relatively more strongly convex, hump-like outer margin (Fig. 7F) ................................................................... ....................................................................... Spiralothelphusa gibberosa Pati & Sudha Devi, 2015
5. G1 relatively stout, with tip strongly curved upwards (Fig. 7J) .......................................................... ....................................................................................... Spiralothelphusa parvula (Fernando, 1961)
– G1 relatively slender, with tip gently hooked downwards (Fig. 7K–L) ............................................ 6
6. Male telson with concave lateral margins (Fig. 7M); G1 non-twisted portion with outer margin sharply, relatively less strongly curved and straight towards base (Fig. 7K) ...................................... .................................................................................... Spiralothelphusa wuellerstorfi (Heller, 1862)
– Male telson with almost straight lateral margins (Fig. 7N); G1 non-twisted portion with outer margin regularly, relatively more strongly curved and distinctly notched towards base (Fig. 7L) ................. ....................................................................................................... Spiralothelphusa andhra sp. nov.
description: Published as part of Pati, Sameer K., Mandal, Sudipta & Jaiswal, Deepa, 2022, Description of a new species of Spiralothelphusa Bott, 1968, and redescription of Spiralothelphusa wuellerstorfi (Heller, 1862) (Decapoda: Brachyura: Gecarcinucidae), pp. 1-29 in European Journal of Taxonomy 798 on page 24, DOI: 10.5852/ejt.2022.798.1629, http://zenodo.org/record/6299793