TABLE 2 in Clarification of the identity of deep-sea crab Tymolus uncifer (Ortmann, 1892) and validation of Tymolus melanommus (Doflein, 1904) (Decapoda: Brachyura: Cyclodorippidae)

TABLE 2. Summary of diagnostic characters among eight allied species of Tymolus Stimpson, 1858. * = Values calculated from published figures. ND: no data.
Characters/SpeciesT. unciferT. melanommusT. bruceiT. davieiT. globosusT. glaucommusT. hirtipesT. similisShape of carapacesubcircularsubpyriformsubpyriformsubcircularsubcircularsubcircularsubcircularsubcircularCarapace dorsal surface setationsparsesparsesparsesparsesparsesparsesparsedenseOrbital notchV-shaped, relatively narrowV-shaped, relatively narrowV-shaped, relatively wideV-shaped, relatively wideV-shaped, relatively wideV-shaped, relatively narrowU-shapedV-shaped, relatively narrowExorbital toothless producedrelatively well producedless producedless producedless producedless producedless producedrelatively well producedCarapace anterolateral tubercleabsentpresentgreatly reduced to granuleabsentunclear from given descriptionpresent, spinoseunclear from given descriptionunclear from given descriptionsPterygostomial regionwith minute granuleswith minute granuleswith minute granuleswith coarse granuleswith spinulose granuleswith spinulose granuleswith minute blunt granuleswith minute blunt granulesOcular pedunclestout, not constricted; corneal width distinctly more than half distance between frontal submedian and lateral teethslender, distinctly constricted; corneal width less than half distance between frontal submedian and lateral teethslender, distinctly constricted; corneal width less than half distance between frontal submedian and lateral teethslender, not constricted; corneal width less than half distance between frontal submedian and lateral teethslender, constricted; corneal width slightly more than half distance between frontal submedian and lateral teethslender, constricted; corneal width approximately half distance between frontal submedian and lateral teethSlender; corneal width less than half distance between frontal submedian and lateral teethslender, not constricted; corneal width less than half distance between frontal submedian and lateral teethPigmentation of corneaabsent, opaquelight brownabsentabsentabsentabsentabsentunknownMaxilliped 3 external surface; shape of meruswithout spinulose granules; subovate with rounded distal marginwithout spinulose granules; lance- shaped with subacutely pointed distal marginwithout spinulose granuleswithout spinulose granuleswithout spinulose granules; distally roundedwithout spinulose granules; NDwithout spinulose granules; NDwith spinulose granules; NDPereopod 2 merus length/cl1.7–2.3 in male, 1.5–2.0 in female1.3–1.6 in male, 1.2–1.3 in female2.8 in male, ND in female2.1 in male*; ND in female1.4 in male1.8–2.5 in female*2.2 in male*1.4 in female*Pereopod 2 merus armature and ornamentationwith cluster of 3–7 hook-like spines at anterodistal angle; surfaces minutely granularwith 1 tiny hook-like spine at anterodistal angle or unarmed; surfaces minutely granularunarmed at anterodistal angle; surfaces minutely granularunarmed at anterodistal angle; surfaces minutely granularwith 1 tiny hook like spine at anterodistal angle; surfaces partially spinulosewith cluster of 3 hook-like spines at anterodistal angle; surfaces partially spinuloseunarmed at anterodistal angle; surfaces minutely granularunarmed at anterodistal angle; surfaces minutely granularPereopod 2 merus length/ width14.3–17.0 in male, 10.1–16.3 in female9.3–11.7 in male, 9.2–10.4 in females21.6 in male*16.4 in male*15.7 in male*19.1–20.4 in female*13.3 in male*12.0 in female*Pereopod 2 carpus+propodus length/merus length0.4–0.6 in male, 0.5–0.8 in female0.6–0.9 in male, 0.7–0.8 in female0.4 in male*0.4 in male*0.8 in male*0.4–0.5 in female*0.5–0.6 in male*0.9 in female*Pereopod 3 merus length/cl1.6–2.0 in male, 1.2–1.8 in female1.0–1.5 in male, 1.0–1.2 in female2.2 in male*1.8 in male*1.3 in male1.3–2.1 in female*1.7 in male*1.3 in female*Pereopod 3 merus length/ width12.9–15.8 in male, 10.0–14.5 in female9.1–11.2 in male, 6.7–9.8 in female18.8 in male*13.6 in male*12.9 in male13.6–15.9 in female*10.6 in male*8.3 in female*Pereopod 3 merus armature and ornamentationwith cluster of 2–4 hook-like spines at anterodistal angle; same as pereopod 2unarmed at anterodistal angle; same as pereopod 2unarmed at anterodistal angle; same as pereopod 2unarmed at anterodistal angle; same as pereopod 2with 1 tiny hook like spine at anterodistal angle; same as pereopod 2with 2 hook-like spines at anterodistal angle; same as pereopod 2unarmed at anterodistal angle; same as pereopod 2unarmed at anterodistal angle; same as pereopod 2Pereopod 3 carpus+propodus length/merus length0.6–0.7 in male, 0.6–0.9 in female0.8–1.0 in male, 0.9–1.0 in femalesND0.5 in male*0.9 in male0.5–0.6 in females0.7 in males*0.9 in female*Pereopods 2 and 3 propodi setationno fringe of setaeno fringe of setaeno fringe of setaeno fringe of setaeNo fringe of setaeNo fringe of setaewith fringe of setae on flexor and/or extensor marginsNo fringe of setaeReference(s)this studythis studyTavares (1991)Tavares (1997)Doflein (1904); Spiridonov & Türkay (2007)Alcock (1894); Alcock & Anderson (1895); Ahyong & Mendoza (2021)Tan & Huang (2000); Ahyong et al. (2009)Tavares (1991); Poore (2004)