Corallianassa borradailei ( De Man, 1928 )

Poore, Gary C. B., Longenecker, Ken & Tudge, Christopher C., 2023, Reappraisal of Hawaiian species of Corallianassa Manning, 1987 (Crustacea: Axiidea: Callichiridae), Zootaxa 5249 (2), pp. 277-289 : 279-281

Corallianassa borradailei ( De Man, 1928)

( Figs 3 , 8a–d , 9a–c )

Callianassa (Callichirus) longiventris var. borradailei De Man, 1928 a: 27 .

Corallianassa borradailei .— Manning 1987: 394–395, figs 7–9.— Komai et al. 2015: 29–39, figs 8–13, 20A–C (redescription, full synonymy, discussion).

Material examined. USA, Hawaii, Oahu , Waikiki, C.H. Edmondson, February 1931, BPBM S4595 (1 specimen) ; Hawaii [as Sandwich Islands ], NHMUK 1859 :79 (3 females identified by Paul. F. Clark) . Mariana Islands, Guam, S and W coasts, seagrass beds, 13.5°N, 144.8°E, 0–1 m , UF 27328 , UF 27340 , UF 27343 , UF 27351 (2 males, 2 females) . Tonga, sandflat, intertidal, G.C.B. Poore, 12 Oct 2011, NMV J62119 (2 females, 13.7 mm) . French Polynesia, Moorea , sandflats and mangroves, 0–1.5 m: Papetoai , UF 15485 (ovigerous female) , UF 23992 (female); Pihaena , UF 23543 (juvenile) , UF 24022 (male); Haapiti , UF 16253 (ovigerous female, with Bopyridae ) , UF 28963 (2 females) , UF 28964 (ovigerous female) , MNHN IU-2014-10468 (2 females, 10.9, 11.1 mm) , IU-2014-10469 (4 females, 8.4–10.8 mm) , IU-2014-10473 (2 females, 6.5, 11.0 mm) .

Diagnosis. Rostrum horizontal, sometimes slightly upturned; carapace anterolateral spines evenly tapered, slightly curved inwards. Maxilliped 3 ischium-merus 1.8 times as long as wide; merus mesiodistal margin convex; propodus free distal margin transverse. Major cheliped ischium lower margin with 6–8 oblique spines increasing in length distally; merus lower margin with 5–9 oblique spines diminishing distally; palm as long as wide, upper margin carinate, blade-like along whole length. Minor cheliped merus lower margin with 2 or 3 oblique spines; minor cheliped palm as long as wide; palm rectangular; fingers as long as palm, curved. Uropodal endopod 1.5 times as long as wide; anterior margin evenly convex; posterior margin convex; apex broadly rounded, flat. Uropodal exopod posterior margin almost straight; proximal article with sharp spine overlapping endopod and smaller accessory proximal lobe. Telson tapering to about half basal width from midpoint, 1.5 times as wide as long; posterior margin evenly slightly convex; dorsal surface with 3 or 4 pairs of spiniform setae lateral to longer fine setae on transverse ridge. Size. Cl. to 15 mm.

Distribution. Western, Central and Eastern Indo-Pacific ( Maldives [type locality]; Chagos Archipelago; Indonesia; Tonga; Marianas; Japan, Ryukyus; Fiji; French Polynesia; Hawaii); intertidal, subtidal ( Komai et al. 2015).

Remarks. Corallianassa borradailei was redescribed in detail by Komai et al. (2015) after previously being widely confused with C. coutierei . The species is characterised by the continuous, flange-like carina along the upper margins of the carpus and palm of the major cheliped, the telson tapering only from the midpoint, with pairs of middorsal spiniform setae in addition to fine setae, and the convex mesiodistal margin of the maxilliped 3 merus.

Three females from Hawaii (NHMUK 1859:79) were identified by Manning (1987) who noted the dorsal carina on the palm extending distally into a distinct flange, a feature characterising this species. The same specimens were seen by Ngoc-Ho (2002) and confirmed for this character by Paul Clark (NHMUK; 22 July 2022). Only one further specimen was found in the BPBM collections.

Figures

FIGURE 3. Corallianassa martensi (Miers, 1885), a–g, Tonga, NMV J62121, male, 15 mm; h–n, Australia, NT, NMV J11176, male, 8.1 mm; o, Australia, Qld, NMV J9020, Callianassa haswelli Poore & Griffin, 1979 paratype female, 8.3 mm. a, h, o, telson, uropod (marginal setae not shown); b, c, i, j, anterior carapace, rostrum, antenna, antennule; d, k, maxilliped 3; e, f, l, m, major cheliped, mesial, upper views; g, n, minor cheliped, mesial view. Scale bars = 1 mm.

FIGURE 8. Black and white photographs. a–d, Corallianassa borradailei (De Man, 1928), BPBM S4595; e–h, Corallianassa oahuensis (Edmondson, 1944), BPBM S4594. a, e, telson; b, f, right uropod; c, g, carapace front, rostrum, eyestalks, dorsal view; d, h, carapace front, rostrum, eyestalks, lateral view. Not to scale.

FIGURE 9. Black and white photographs. Corallianassa borradailei (De Man, 1928): a, b, BPBM S4595; c, NMV J62119. Corallianassa oahuensis (Edmondson, 1944): d, e, BPBM S4594; f, UF 45630. Corallianassa martensi (Miers, 1884): g, UF 45445; h, UF23948. a, d, major cheliped, mesial view; b, c, e–h, major cheliped carpus-dactylus, upper view. Not to scale.