Rudisullianassa rudisulcus (Komai, Fujita and Maenosono, 2014)

Poore, Gary C. B., 2023, New records, one new genus and 21 new species of Callianassidae (Crustacea, Axiidea) from the Indo-West Pacific, Memoirs of Museum Victoria 82, pp. 167-255 : 238

Rudisullianassa rudisulcus (Komai, Fujita and Maenosono, 2014)

Figures 1i , 48

Rayllianassa rudisulcus Komai et al., 2014a: 554–560 , figs 3–7. Rudisullianassa rudisulcus .— Poore et al., 2019: 140, 143.—

Robles et al., 2020: figs 1, 3, 6.

Material examined. Papua New Guinea, Madang Province, S of Tab I., 05° 10.3' S, 145° 50.3' E, 2–4 m ( PAPUA NIUGINI stn PR22), MNHN IU-2013-435 * (ovigerous female, 4.4 mm), MNHN IU-2013- 7060 * (hermaphrodite, 3.7 mm), MNHN IU-2013-7069 * (ovigerous female, 4.0 mm), MNHN IU-2017-1345 (7 hermaphrodites, 2 ovigerous females, 2.9–3.7 mm), NMV J71663 (3 hermaphrodites, 1 ovigerous female, 2.9–3.8 mm) . Kranket I., 05° 11.5' S, 145° 49.5' E, 10–20 m ( PAPUA NIUGINI stn PR58), MNHN IU-2013-7088 * (2 ovigerous females, 3.4 mm), MNHN IU-2013-7042 * (ovigerous female, 4.4 mm), MNHN IU-2013-7131 (ovigerous female, 3.7 mm), MNHN IU-2013-7121 (hermaphrodite, 3.8 mm) . N of Madang, intertidal 04° 59.3' S, 145° 47.6' E ( PAPUA NIUGINI stn PM27 ), MNHN IU-2013-7057 (ovigerous female, 2.9 mm) .

Diagnosis. Telson as long as wide, broadest at anterior third, narrowing posteriorly to rounded posterolateral angles; dorsal surface with few medial setae anterior to midlength; posterolateral angle with row of small spiniform setae; posterior margin convex. Uropod endopod oval, about 1.4 times as long as wide; upper surface without spiniform setae. Exopod oval, 1.4 times as long as wide, with row of submarginal slender setae; posterior margin with numerous slender setae, with 3 blade-like distal setae; upper surface with 1 spiniform seta near midpoint.

Distribution. South Kurishio, Eastern Coral Triangle (Ryukus, Japan [type locality: Ohura Bay, Okinawa I., 3–20 m]; Papua New Guinea); 0–20 m; associated with submerged wood.

Remarks. The species description and figures are comprehensive (Komai et al., 2014a) and little needs to be added. The maxilliped 3 dactylus is short and bears dense setae over the distal and upper margins, much denser than in R. pandan , and resembles the condition in eucalliacids. Komai et al. (2014b) figured the female pleopod 2 with a 2-articled exopod; all of the new material has only one article, as is typical of callianassids (fig. 41h). The major chela is mesially twisted and its palm is characterised by a lateral triangular tooth in the gape (fig. 41c–e).

Figures

Figure 1. Dactylus of maxilliped 3 of representatives of two callianassoid families. Eucalliacidae. a, Calliaxina kensleyi (Dworschak, 2005), MNHN IU-2016-8084. Callianassidae. b, Caviallianassa moorea sp. nov., UF 28875; c, Paratrypaea sp, MNHN IU-2013-7035; d, Praedatrypaea lobetobensis sp. nov., MNHN IU-2015-109; e, Praedatrypaea orientalis (Bate, 1888), AM P.74473; f, Rayllianassa amboinensis (De Man, 1888), UF 8700; g, Rayllianassa bifida sp. nov., MNHN IU-2013-7137; h, Rudisullianassa pandan sp. nov., MNHN IU-2013-7063; i, Rudisullianassa rudisulcus Komai, Fujita and Maenosono, 2014, MNHN IU-2013-7121; j, Scallasis amboinae Bate, 1888, MNHN IU-2013-12303; k, Spinicallianassa spinicauda (Komai, Maenosono and Fujita, 2014), MNHN IU-2014-2778; l, Spinicallianassa papetoai sp. nov., UF 29280.

Figure 48. Rudisullianassa rudisulcus Komai, Fujita and Maenosono, 2014. Papua New Guinea. MNHN IU-2013-7121, hermaphrodite, 3.8 mm: a, eyestalk, carapace. MNHN IU-2013-435, ovigerous female, 4.4 mm: b, pleomere 6, telson, right uropod; c, d, maxilliped 3 (mesial, outer views); e, f, pleopods 1, 2; g, major cheliped (right, mesial); h, major cheliped carpus–dactylus (upper); i, major cheliped distal palm, fingers (lateral); j, minor cheliped (left, mesial). Scale bars = 1 mm.