Danarma obtusifrons ( Dana, 1851 )
publication ID |
https://doi.org/ 10.26107/RBZ-2020-0097 |
publication LSID |
lsid:zoobank.org:pub:815E4670-B063-4FD8-B31E-3AD89B3A7942 |
DOI |
https://doi.org/10.5281/zenodo.6525261 |
persistent identifier |
https://treatment.plazi.org/id/49152B56-FFFE-BA3E-FF31-FEADFA21FDC4 |
treatment provided by |
Diego |
scientific name |
Danarma obtusifrons ( Dana, 1851 ) |
status |
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Danarma obtusifrons ( Dana, 1851) View in CoL
( Figs. 13A View Fig , 14A View Fig , 18A View Fig , 19A–C, F–I View Fig , 43E View Fig )
Sesarma obtusifrons Dana, 1851: 250 View in CoL ; Dana, 1852: 355, pl. 22, fig. 9; H. Milne Edwards, 1853: 183; De Man, 1887: 644; Lenz, 1901: 472; Titcomb et al., 1979: 367; Godwin & Bolick, 2006: 39, 49.
Sesarma (Holometopus) obtusifrons View in CoL – Rathbun, 1906: 840; 1907: 35; Tesch, 1917: 179 (part); Edmondson, 1946: 306, fig. 183e; Edmondson, 1959: 185, figs. 13c, 17c; Serène, 1968: 107 (part).
Chiromantes obtusifrons View in CoL – Ng & Liu, 1999: 230.
“ Chiromantes ” obtusifrons View in CoL – Ng et al., 2008a: 220, 224 (part); Castro, 2011: 120 View Cited Treatment ; Davie & Ng, 2013: 2, figs. 1, 4A, 5A, B, 6A, B, 7A, B, 8A, 9A, B, 10A, 11.
Incertae sedis [see remarks later] (see Davie & Ng, 2013: 7)
Sesarma (Sesarma) obtusifrons View in CoL – De Man, 1895: 161; De Man, 1898: pl. 29, fig. 31.
Material examined. 2 males (16.8 × 12.9 mm, 19.7 × 14.7 mm) ( ZRC 2002.0220 View Materials , ex. BPBM-266), Malaikahana, Oahu, Hawaii, C.M. Cooke et al., 8 July 1916 ; 1 male (17.7 × 13.2 mm), 1 female (15.7 × 11.6 mm) ( UF-FLMNH 14837 ), 21.2833°N 157.667°E, Coco Head, Oahu, Hawaii, coll. G. Paulay et al., October 2006 GoogleMaps .
Diagnosis. Carapace transversely rectangular, ca. 1.3 times broader than long; dorsal carapace, lateral branchial regions weakly convex, not prominently swollen; external orbital tooth with outer margin broadly convex so greatest carapace width clearly posterior to external orbital tooth; front ca. 0.65 times carapace width, margin broadly convex in frontal view with medial part relatively straight in dorsal view, beaded with row of small but distinct granules, with pair of low lateral swellings behind margin; supraorbital margin entire, semicircular; dorsal surface of cheliped carpus covered in small but conspicuous granules; ambulatory legs relatively short; third ambulatory merus ca. 2.2 times longer than wide; fifth ambulatory merus ca. 2.3 times longer; fourth ambulatory propodus ca. 2.2 times longer; male pleon moderately broad; somite 6 with distolateral margins strongly divergent, relatively straight over distal two-thirds; somite 3 width 2.9 times basal width of telson; G1 relatively slender, weakly tapering to obtusely angled subdistal shoulder; distally slender, strongly bent to 45° angle; distal chitinous process long, with slender narrow apex, dorsal margin slightly concave. (After Davie & Ng, 2013: 2).
Colour. “Background colour of carapace, legs fawn to bluish gray, covered in fine darker speckling with scattering of slightly larger irregular spots. Legs with darker, broad transverse bands that are more noticeable on the carpi and meri. Chelipeds dorsally similar in colour to carapace and legs but becoming greyish white in frontal and ventral view. Ocular peduncles and corneas pale, similar to carapace in colour.” ( Davie & Ng, 2013: 5; fig. 1).
Remarks. This characteristic species has been reported from a wide area from the eastern Indian Ocean to Hawaii (type locality). Davie & Ng (2013) revised the taxonomy of the species and recognised four new species. All these species share the diagnostic generic features of the genus. Although the type(s) of Sesarma obtusifrons Dana, 1851 , are almost certainly lost, Davie & Ng (2013) argued that there was no need to designate a neotype as the species is distinctive and easily distinguished for all known congeners.
Biology. “ Edmondson (1959) noted that C. obtusifrons was found intertidally and “even above the high water mark”, and Paulay & Starmer (2011: 11) reported finding it living in a supratidal boulder field on O‘ahu.” ( Davie & Ng, 2013: 7).
Distribution. Known only from Hawaii ( Davie & Ng, 2013).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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Danarma obtusifrons ( Dana, 1851 )
Schubart, Christoph D. & Ng, Peter K. L. 2020 |
“ Chiromantes ” obtusifrons
Davie PJF & Ng PKL 2013: 2 |
Castro P 2011: 120 |
Ng PKL & Guinot D & Davie PJF 2008: 220 |
Chiromantes obtusifrons
Ng PKL & Liu HC 1999: 230 |
Sesarma (Holometopus) obtusifrons
Serene R 1968: 107 |
Edmondson CH 1959: 185 |
Edmondson CH 1946: 306 |
Tesch JJ 1917: 179 |
Rathbun MJ 1906: 840 |
Sesarma (Sesarma) obtusifrons
Man JG De 1895: 161 |
Sesarma obtusifrons
Godwin S & Bolick H 2006: 39 |
Titcomb M & Fellows DB & Pukui MK & Devaney DM 1979: 367 |
Man JG De 1887: 644 |
Milne Edwards H 1853: 183 |
Dana JD 1852: 355 |
Dana JD 1851: 250 |