Lophoplax pannosa, Ng & Rahayu, 2023

Ng, Peter K. L. & Rahayu, Dwi Listyo, 2023, Review of the pilumnid crab genus Lophoplax Tesch, 1918 from the western Pacific, with descriptions of two new species, and the clarification of the identity of Pseudocryptocoeloma parvus Ward, 1936 (Crustacea: Brachyura), Zootaxa 5244 (5), pp. 428-454 : 442-444

publication ID	https://doi.org/ 10.11646/zootaxa.5244.5.2
publication LSID	lsid:zoobank.org:pub:B55396DA-15DB-4CDF-81FD-78686A0EC3A2
DOI	https://doi.org/10.5281/zenodo.7663760
persistent identifier	https://treatment.plazi.org/id/039087CD-7E0B-7338-47C6-F942F59CFCCE
treatment provided by	Plazi
scientific name	Lophoplax pannosa
status	sp. nov.

Treatment

Lophoplax pannosa View in CoL n. sp.

( Figs. 2H View FIGURE 2 , 4D View FIGURE 4 , 5F, L View FIGURE 5 , 6F View FIGURE 6 , 7F, L View FIGURE 7 , 8D View FIGURE 8 )

Type material. Holotype: ovigerous female (7.4 × 5.7 mm) ( ZRC 2019.1190 View Materials ), station LD07, Turtle Bay , Vanuatu, 15°19.8′S 167°11.1′E, 1–3 m, coll. SANTO 2006 Expedition, 28 September 2007 GoogleMaps

Diagnosis of female. Carapace subquadrate ( Fig. 4D View FIGURE 4 ); epigastric, protogastric, hepatic, cardiac and intestinal areolets glabrous, prominent, smooth; epigastric areolets transversely narrow,relatively longer, not fused with protogastric areolets ( Fig. 4D View FIGURE 4 ); protogastric areolet relatively transversely narrower, obliquely positioned ( Fig. 4D View FIGURE 4 ); cardiac areolet transverse in position ( Fig. 4D View FIGURE 4 ); hepatic areolet prominent, more elongate, reaching to second anterolateral tooth ( Fig. 4D View FIGURE 4 ); external orbital tooth triangular ( Fig. 4D View FIGURE 4 ); tips of anterolateral teeth sharply pointed ( Fig. 4D View FIGURE 4 ); junction between antero- and posterolateral margins with 2 low lobes, not swollen or tuberculiform ( Fig. 4D View FIGURE 4 ); epistome relatively wider longitudinally ( Fig. 5F View FIGURE 5 ); median lobe of posterior margin of the epistome relatively low with lateral margins gently concave ( Fig. 5F View FIGURE 5 ). Third maxilliped with merus quadrate, ischium subrectangular ( Fig. 5L View FIGURE 5 ). Dorsal and lateral surfaces of carpus of cheliped with 5 weakly defined areolets, deeply eroded ( Fig. 6F View FIGURE 6 ); cheliped fingers not distinctly bent, pollex subparallel with the ventral margin of palm ( Fig. 7F View FIGURE 7 ). P2–P5 relatively not elongate ( Figs. 2H View FIGURE 2 , 7L View FIGURE 7 ); outer surface of P3–P5 merus, carpus and propodus gently rugose ( Fig. 7L View FIGURE 7 ).

Colour in life. Not known.

Etymology. The name is derived from the Latin “pannosus” for scruffy or unkempt, alluding to the general appearance of the species, even after cleaning.

Remarks. Lophoplax pannosa n. sp. differs from L. scuplta in that the epigastric areolet is transversely narrower and longer ( Fig. 4D View FIGURE 4 ) (versus relatively wider and shorter; Fig. 3A–C View FIGURE 3 ); the protogastric areolet is relatively transversely narrower and obliquely positioned ( Fig. 4D View FIGURE 4 ) (versus transversely wider and subparallel in position; Fig. 3A–C View FIGURE 3 ); the cardiac areolet is obliquely positioned ( Fig. 4D View FIGURE 4 ) (versus clearly transverse in position; Fig. 3A–C View FIGURE 3 ); the hepatic areolet is proportionately longer, reaching to the beginning of the second anterolateral tooth ( Fig. 4D View FIGURE 4 ) (versus shorter, reaching only to the base of the first tooth; Fig. 3A–C View FIGURE 3 ); the junction between the antero- and posterolateral margins is demarcated by two low lobes but neither swollen or tuberculiform ( Fig. 4D View FIGURE 4 ) (versus junction with two large rounded to subtruncate tubercles with the tips rounded to flattened, often with median depression; Figs. 3A–C View FIGURE 3 , 9A View FIGURE 9 ); the median lobe of the posterior margin of the epistome is relatively low with the lateral margins gently concave ( Fig. 5F View FIGURE 5 ) (versus median lobe is more salient with the lateral margins deeply concave; Fig. 5A, B View FIGURE 5 ); and the dorsal and outer surfaces of the carpus of the cheliped are covered with five weakly defined areolets which are deeply eroded ( Fig. 6F View FIGURE 6 ) (versus with four distinct smooth areolets; Fig. 6A, B View FIGURE 6 ). No male specimens are available.