Corralliogalathea joae, Rodríguez-Flores & Macpherson & Buckley & Machordom, 2018

CORRALLIOGALATHEA JOAE SP. NOV.

( FIGS 5C, 6)

urn:lsid:zoobank.org:act:9E36D411-7E7A-4990-A34C-158CCE102059

Material examined

Holotype: Vanuatu. SANTO cruise, Stn EP 36, 15.555°S, 167.045°E, 20–60 m, 15 October 2006: ov. F, 2.4 mm (MNHN-IU-2013-17344). GoogleMaps

Paratypes: Madagascar. Tulear, coll. Tomassin, Stn 896: one ov. F, 2.4 mm (MNHN-IU-2013-17331) .

Papua New Guinea. Papua Niugini , Stn PR 48, 05.12°S, 145.8233°E, no depth, 17 November 2012: one ov., F 2.4 mm (MNHN-IU-2013-17361).– Stn PB 11, 05.20833°S, 145.81833°E, 13 m, 30 December 2012: one ov. F, 2.3 mm (MNHN-IU-2013-367). – Stn PB 31, 05.1567°S, 145.8333°E, 31 m, 30 December 2012: one ov. F, 1.5 mm (MNHN-IU-2013-17347). – Stn PS 23, 05.0762166°S, 145.82015°E, 21 m, 30 December 2012: three M, 1.2– 1.6 mm, two ov. F, 1.5–1.7 mm (MNHN-IU-2013-17360) GoogleMaps .

KAVIENG lagoon cruise, Stn KB04, 02.55°S, 150.7667°E, 15–17 m, 3 June 2014, one M, 1.5 mm, one F, 1.4 mm (MNHN-IU-2014-13694-13592). – Stn KB26, 02.7333°S, 150.7167°E, 9–15 m, 10 June 2014, one ov. F, 2.3 mm (MNHN-IU-2014-2383).

Vanuatu. SANTO cruise, Stn ED 16, 15.5883°S, 167.1233°E, 5–7 m, 17 September 2006: one M, 1.5 mm (MNHN-IU-2013-17358). – Stn DB 40, 15.4967°S, 167.2517°E, 5m, 19 September 2006:twoM, 1.7–2.0 mm, one ov. F, 1.8 mm (MNHN-IU-2013-17342). – Stn DB 53, 15.48°S, 167.2533°E, 5 m, 22 September 2006: two ov. F, 1.8–2.1 mm (MNHN-IU-2013-17352, 17353). – Stn DB 58, 15.41°S, 167.2383°E, 6–43 m, 23 September 2006: one M, 1.6 mm (MNHN-IU-2013-17346). Stn ZB 20, 15.6017°S, 167.09°E, 15–20 m, 10 October 2006: one ov. F, 1.5 mm (MNHN-IU-2013-17343). – Stn FB 68, 15.59°S, 166.995°E, 11 m, 11 October 2006: one ov. F, 1.9 mm (MNHN-IU-2013-17355) GoogleMaps .

We s t e r n A u s t r a l i a. N i n g a l o o R e e f, 2 2.6 0 8 3°S, 113.6249°E, 15 m, 2009: one M, 2.0 mm ( UF23446 ) GoogleMaps .

Other material: KAVIENG lagoon cruise, Stn KB06, 02.6833°S, 150.6833°E, 8 m, 4 June 2014: one F, 1.5 mm (MNHN-IU-2014-13638). – Stn KB16, 02.5666°S, 150.7667°E, 13–14 m, 7 June 2014, one ov. F, 1.9 mm, one F, 1.4 mm (MNHN-IU-2014-13617-13512). – Stn KD11, 02.6666°S, 50.7°E, 15 m, 8 June 2014, one ov. F, 2.0 mm (MNHN-IU-2014-13642). – Stn KB22, 02.75°S, 150.7167°E, 8–24 m, 10 June 2014, one ov. F, 1.6 mm (MNHN-IU-2014–2333). – Stn KD23, 02.65°S, 150.6°E, 5–10 m, 12 June 2014, two M, 1.6–1.8 mm (MNHN-IU-2014-13582). – Stn KS41, 02.6°S, 150.5333°E, 2–7 m, 16 June 2014, one M, 1.8 mm (MNHN-IU-2014-13648). – Stn KB74, 02.75°S, 150.7333°E, 20 m, 27 June 2014, one M, 2.0 mm (MNHN-IU-2014-13581).

Vanuatu. SANTO cruise, Stn DB 6 5, 1 5.4 3° S, 167.2167°E, 13 m, 26 September 2006: one M, 1.6 mm, five ov. F, 1.2–1.4 mm (MNHN-IU-2013-17348). – Stn DB 80, 15.6183°S, 167.125°E, 18 m, 2 October 2006: two M, 1.6–1.8 mm, two ov. F, 1.6–1.7 mm (MNHN-IU-2013-17356). – Stn NS 36, 15.5283°S, 167.1583°E, 2–3 m, 2 October 2006: one M, 1.8 mm, three ov. F, 1.3–1.7 mm (MNHN-IU-2013-17357). – Stn DB 86, 15.6416°S, 167.2517°E, 13 m, 4 October 2006: one F, 1.5 mm (MNHN-IU-2013-17351). – Stn EP 32, 15.61°S, 167.0333°E, 100 m, 14 October 2006: one ov. F, 2.0 mm (MNHN-IU-2013-17349). – Stn FS 96, 15.5516°S, 167.16°E, 35 m, 14 October 2006: one M, 1.3 mm, one ov. F, 1.6 mm (MNHN-IU-2013-17354). – Stn FB 80, 15.5516°S, 167.16°E, 2 m, 14 October 2006: three M, 1.5–2.0 mm, four ov. F, 1.8–2.2 mm (MNHN-IU-2013-17327). – Stn FS 82, 15.5383°S, 167.29°E, 8–20 m, 15 October 2006: two M, 1.5–1.8 mm, oneov.F, 2.0 mm, oneF, 1.5 mm (MNHN-IU-2013-17350). – Stn EP 36, 15.555°S, 167.2116°E, 20–60 m, 15 October 2006: two ov. F, 2.1–2.4 mm (MNHN-IU-2013-17359). – Stn EP 39, 15.5616°S, 167.275°E, 75–80 m, 17 October 2006: one ov. F, 1.8 mm (MNHN-IU-2013-17345) GoogleMaps .

Eastern Australia. Queensland, Lizard Island , 14.3902°S, 145.2737°E, 10–12 m, 9 February 2009: one ov. F, 2.6 mm ( UF16689 ). – 14.6504°S, 145.4621°E, no depth, 20 February 2009: one ov. F, 2.1 mm ( UF18286 ) GoogleMaps .

Etymology

Named after Jo Taylor for her contributions to squat lobster systematics.

Description

Carapace: 1.0–1.2 times broader than long; cervical groove distinct, laterally bifurcated; one medially interrupted or scale-like epigastric ridge; two protogastric ridges, anterior ridge medially interrupted or scale like, posterior ridge short, arcuate, clearly prominent, with thick plumose setae; one mesogastric ridge, uninterrupted, not extending to anteriormost marginal branchial spines; one metagastric ridge, uninterrupted and not extending to anterior branchial ridges. Anterior branchial region with distinct ridges. Mid-transverse ridge usually uninterrupted, preceded by shallow cervical groove, followed by three transverse ridges, two of them uninterrupted. Lateral margins slightly convex medially, with six spines: one spine in front of and five spines behind anterior cervical groove; first spine anterolateral, small, clearly before level of orbit, located near outer orbital spine; two spines on anterior branchial margin, and three spines on posterior branchial margin, last spine small. Strong outer orbital spine. Rostrum spatulate, horizontal, as long as or slightly longer than broad, length 0.4 and breadth 0.3–0.4 that of carapace; dorsal surface nearly horizontal or slightly concave in lateral view; lateral margin with four incised sharp teeth, basal pair of spines smaller than others.

Pterygostomian flap rugose, with one or two distinct spines on upper margin near linea anomurica, with sparse short setae, anterior margin bluntly angular.

Sternum: Nearly as long as broad; lateral extremities gently divergent posteriorly. Third sternite triangular, 1.0–1.3 times wider than long.

Abdomen: Somites 2–4 each with uninterrupted transverse stria behind anterior ridge; somites 5 and 6 smooth, posteromedian margin of somite 6 straight.

Eyes: Ocular peduncles as long as broad, maximal corneal diameter 0.7 of rostrum width.

Antennule: Article 1 with two well-developed distodorsal and distolateral mucronated spines, distodorsal larger; distomesial spine small; one minute distomesial spine on dorsal side. Ultimate article without a tuft of fine setae on distodorsal margin.

Antenna: Article 1 with strong distomesial spine barely reaching distal margin of article 2.

Mxp3: Ischium with minute spine on flexor distal margin; crista dentata with nine or ten denticles. Merus as long as ischium; flexor margin with one strong spine; extensor margin with one distal spine. Carpus unarmed.

P1: Males 2.3–3.8 and females 1.7–2.1 times carapace length. Merus 0.6–0.7 length of carapace, 1.3–1.6 times as long as carpus, with some dorsomesial and a few ventromesial spines. Carpus 1.0–1.5 length of palm, 1.5–2.5 times as long as broad; dorsal surface with small spines; mesial row with two or three well-developed spines. Palm 1.0–1.3 times as long as broad, with a few small spines along lateral and mesial margins. Fingers unarmed, 1.0–1.3 length of palm, each finger distally with four or five teeth, and spooned.

P2–4: Moderately short, with setose striae and some long plumose setae. P2 1.5–1.7 times carapace length. Meri successively shorter posteriorly (P3 merus 0.8– 0.9 length of P2 merus, P4 merus 0.7–0.9 length of P3 merus); P2 merus 0.5–0.6 carapace length, 3.0–3.5 times as long as broad, 1.2 length of P2 propodus; P3 merus 3.0 times as long as broad, 1.2 length of P3 propodus; P4 merus 2.7–3.0 times as long as broad, 0.9–1.2 length of P4 propodus. Extensor margins of meri with row of four to six proximally diminishing spines on P2–3, unarmed on P4; flexor margins distally ending in small spine followed proximally by several eminences; lateral sides unarmed. Carpi with no to three spines on extensor margin; lateral surface with several spines or acute granules sub-paralleling extensor margin on P2–4; flexor distal margin unarmed. P2–4 propodi 3.8–4.8 times as long as broad; extensor margin unarmed; flexor margin with three or four slender, movable spines on P2–4. Dactyli distally ending in well-curved strong spine, length 0.6–0.7 that of propodi.

Remarks

Coralliogalathea joae is easily distinguished from the other species of the genus by the number of lateral teeth on the rostrum; four in C. joae and three in the other species.

Coralliogalathea joae is genetically very distinct from the rest of the species. Genetic divergences with the other species ranged from 13.0 to 14.7% for COI and from 8.8 to 14.3% for 16S. Average intraspecific distances were 1.1 and 0.2% for COI and 16S, respectively ( Table 2).

Distribution

Madagascar, Western and Eastern Australia, Papua New Guinea, Vanuatu, 2–100 m, in corals (e.g. Pocillopora sp. ).

CORALLIOGALATHEA MEGALOCHIRA (NOBILI, 1906)