Phylladiorhynchus lini Rodríguez-Flores &amp; Macpherson &amp; Machordom 2021, n. sp.
Creators: name: Rodríguez-Flores, Paula C.
name: Macpherson, Enrique
name: Machordom, Annie
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Decapoda
Galatheidae
Phylladiorhynchus
Phylladiorhynchus lini

description: <i>Phylladiorhynchus lini</i> n. sp. (Figs. 29, 30J–L, S–T, 33B, 55A, 56D–I) <b>Type material.</b> <i>Holotype.</i> Taiwan, Kenting County, Houbihu, 21.936361°N, 120.746806°E, 7–10 m, 2 June 2019: F 2.2 mm (NMMBCD5596). <i>Paratypes</i>. Taiwan. Kenting County. Small fishing port S of Wanlitung. 21.9706°N 120.7156°E, 5–8 m, 30 June 2007: 1 ov. F 2.6 (UF11812).— Kenting County, National Museum of Marine Biology &amp; Aquarium, Water outlet, 21.9319°N, 120.7344°E, 8–10 m, 23 May 2011: 1 M 3.4 mm (NMMBCD).— 21.9319°N, 120.7344°E, 8–10 m, 24 May 2011: 1 ov. F 3.0 mm, 1 F 3.2 mm (NMMBCD).— 21.9230°N, 120.8319°E, 7–10 m, 30 May 2011: 9 M 2.6–3.7 mm, 2 F 2.9–3.2 mm, 9 ov. F 1.7–3.1 mm (NMMBCD).— 21.9319°N, 120.7447°E, 8–10 m, 25 July 2011: 2 M 3.0– 3.1 mm, 1 ov. F 2.1 mm (NMMBCD).— 21.9319°N, 120.7447°E, 8–10 m, 5 October 2011: 2 F 2.5–3.1 mm (NMMBCD).— Houbihu, 21.9361°N, 120.7466°E, 7–10 m, 2 June 2019: 1 M 1.7 mm, 1 ov. F 2.5 mm, 1 F 1.4 mm (MNHN- IU-2016-1490). <b>Other material</b>. Kenting County, National Museum of Marine Biology &amp; Aquarium, Water outlet, 21.9319°N, 120.7447°E, 8–10 m, 13 October 2011: 1 M 2.2 mm (NMMBCD).— 21.9319°N, 120.7447°E, 8–10 m, 19 November 2011: 1 F 2.6 mm (NMMBCD).— 21.9319°N, 120.7447°E, 8–10 m, 3 May 2012: 1 ov. F 3.0 mm (NMMBCD).— Houbihu, 21.9361°N, 120.7466°E, 7–10 m, 14 May 2012: 1 ov. F 2.9 mm (NMMBCD).— Houbihu, 21.9361°N, 120.7466°E, 7–10 m, 29 June 2013: 1 ov. F 2.5 mm (NMMBCD).— Hojie, 21.9553°N, 120.7116°E, 24–26 m, 26 February 2013: 1 ov. F 2.7 mm (NMMBCD). <b>Etymology.</b> The species is named after our colleague Chia-Wei Lin, from the National museum of marine biology &amp; aquarium, Pingtung, Taiwan, who collected most of the specimens. <b>Description.</b> <i>Carapace:</i> As long as or slightly longer than broad; transverse ridges with dense short setae and some thick setae. Gastric region slightly convex with some transverse ridges: epigastric ridge distinct with 2 median spines and some lateral short scales, followed by small short scales on posterior epigastric region; anterior protogastric ridge not medially interrupted, nearly extending laterally to carapace margin, often followed by uninterrupted posterior protogastric ridge or short scales; anterior mesogastric ridge not medially interrupted, laterally interrupted by anterior branch of cervical groove, and continuing uninterrupted to first branchial spine; anterior metagastric ridge not medially interrupted, followed by posterior scale-like metagastric ridge. Mid-transverse ridge not interrupted, medially depressed, followed by shallow or indistinct cervical groove, followed by 2–3 not interrupted or minutely interrupted ridges, interspersed with 2 interrupted riges and few short scales. Lateral margins slightly convex, with 6 distinct spines: first anterolateral spine well-developed, reaching anteriorly to level of lateral orbital spine, second spine (hepatic) well-developed, slightly dorsomesially from lateral margin, and followed by 4 branchial spines (3 anterior and 1 posterior). Rostrum dagger-like, horizontal dorsally flattish or slighly concave [1.5]–1.8 × as long as broad, length [0.4]–0.5 and breadth 0.2–[0.3] that of carapace; lateral margins smooth and straight or nearly straight, with well-developed supraocular basal spines and subapical spines. Pterygostomian flap with anterior spine, upper margin smooth. <i>Thoracic sternum</i>: As wide as long. Sternite 3 moderately broad, [1.9]–2.3 × as wide as long, anterior margin convex, with a blunted median projection, anterolaterally rounded. Sternite 4 widely contiguous to sternite 3; anterolaterally smooth, surface depressed in midline, smooth; greatest width [2.5]–2.9 × that of sternite 3, 2.7–[3.5] × as wide as long. <i>Pleon</i>: Elevated ridges with short setae and a few scattered long setae. Tergite 2–4 with anterior and posterior transverse elevated ridges; tergites 5–6 smooth. <i>Eye:</i> Eyestalk length about 0.9–[1.1] × broader than long, peduncle distally setose, not distinctly expanded proximally, with few short transverse striae on lateral surfaces; cornea expanded distally, maximum corneal diameter [0.9]–1.0 × rostrum width, as wide as eyestalk. <i>Antennule</i>: Article 1 longer than wide, with 5 distal spines: distomesial spine well-developed; proximal lateral spine small, always present. <i>Antenna:</i> Article 1 with prominent mesial process, distally falling well short of lateralmost antennular spine. Article 2 with well-developed distomesial and distolateral spines. Article 3 unarmed or with small distomesial spine. Article 4 unarmed. <i>Mxp3:</i> Ischium with distinct distal spines on flexor and extensor margins. Merus [0.6]–0.7 × length of ischium, with well-developed distal spine on extensor and flexor margins. <i>P1</i>: Slender, 3.0 (males), 2.0–[2.3] (females) × carapace length; subcylindrical, spiny and with long stiff setae; merus, carpus and palm with spines along mesial, dorsal and lateral surfaces, distal and mesial spines usually stronger than others. Merus 0.7–[0.9] length of carapace, 1.5–[1.8] × as long as carpus. Carpus [2.5]–3.1 × as long as wide. Palm 1.1 × carpus length, 2.3–[2.7] × as long as broad. Fingers 0.7× palm length; fixed finger with 0–1 basal spines; movable finger with 1 basal spine. <i>P2–4</i>: setose and spinose. Meri successively shorter posteriorly: P3 merus 0.9 × length of P2 merus, P4 merus [0.8]–0.9 × length of P3 merus. P2 merus, 1.5–[1.8] × carapace length, [3.4]–4.4 × as long as broad, [1.1]1.1 × as long as P2 propodus; P3 merus [3.6]–3.7 × as long as broad, 1.0–[1.2] × as long as P3 propodus; P4 merus [3.2]–3.7 × as long as broad, 1.0–[1.1] × as long as P4 propodus; extensor margin of P2 and P3 with row of spines, proximally diminishing, with prominent distal spine; P4 extensor margin irregular, unarmed; flexor margin irregular, with distal spine on P2–3, absent or small on P4. Carpi with 2–4 small spines on extensor margin on P2–3, unarmed on P4; distal spine prominent on P2–3, absent on P4; row of granules below extensor margin on lateral surface of P2–4; flexor margin unarmed. Propodi stout, 4.0–5.0 × as long as broad; extensor margin irregular; flexor margin with 3–6 slender movable spines in addition to distal pair. Dactyli [0.6–0.7]0.5–0.7 × length of propodi, ending in incurved, strong, sharp spine; flexor margin with cuticular spines at basis of 5–6 movable spines. <i>Eggs</i>: Ov. F carried approximately 4– 15 eggs of 0.5 mm diameter. <b>Live colour.</b> Variable colour pattern. Body dark to light brown, sometimes orange or with large whitish spots and bands. P1–4 with dusky and whitish bands. <b>Genetic data.</b> COI and 16S, Table 1. <b>Distribution.</b> Taiwan, Kenting, between 5 and 26 m. <b>Remarks.</b> <i>Phylladiorhynchus lini</i> belongs to the group of species having 2 epigastric spines, 1 hepatic spine, 3 spines on the anterior branchial margin, rostrum dagger-like (margin straights or nearly straight) and dactylar spines along the flexor margin of the P2–4 dactyli. The new species is closely related to <i>P. spinosus</i> Schnabel &amp; Ahyong, 2019, from New Zealand and Australia (see the differences under the Remarks of <i>P. spinosus</i>). The specimens of <i>P. lini</i> range from 1.4 to 3.4 mm postorbital carapace length. The two sequences of <i>P. lini</i> from Taiwan diverged 0.6% (COI) and 0.2% (16S).
description: Published as part of <i>Rodríguez-Flores, Paula C., Macpherson, Enrique &amp; Machordom, Annie, 2021, Revision of the squat lobsters of the genus Phylladiorhynchus Baba, 1969 (Crustacea, Decapoda, Galatheidae) with the description of 41 new species, pp. 1-159 in Zootaxa 5008 (1)</i> on pages 80-83, DOI: 10.11646/zootaxa.5008.1.1, http://zenodo.org/record/5157455
description: {"references": ["Schnabel, K. E. &amp; Ahyong, S. T. (2019) The squat lobster genus Phylladiorhynchus Baba, 1969 in New Zealand and eastern Australia, with description of six new species. Zootaxa, 4688 (3), 301 - 347. https: // doi. org / 10.11646 / zootaxa. 4688.3.1"]}