Lyphira bellagrana, Rahayu & Ng, 2024

Rahayu, Dwi Listyo & Ng, Peter K. L., 2024, On the genus Lyphira Galil, 2009 (Crustacea: Brachyura: Leucosiidae), with descriptions of four new species from the West Pacific, Zootaxa 5476 (1), pp. 358-392 : 386-389

publication ID	https://doi.org/ 10.11646/zootaxa.5476.1.29
publication LSID	lsid:zoobank.org:pub:DD4EA1FE-A0BE-4BA4-9AD3-E460B131C518
DOI	https://doi.org/10.5281/zenodo.12681465
persistent identifier	https://treatment.plazi.org/id/03DD87DA-FFA2-125B-28EE-FBDC86AD18C1
treatment provided by	Plazi
scientific name	Lyphira bellagrana
status	sp. nov.

Treatment

Lyphira bellagrana n. sp.

( Figs. 5C, D View FIGURE 5 , 6G View FIGURE 6 , 8E, F View FIGURE 8 , 9G View FIGURE 9 , 10I, J View FIGURE 10 , 11I, J View FIGURE 11 , 13M, N View FIGURE 13 , 14G, H View FIGURE 14 , 15I, J View FIGURE 15 , 16J, K View FIGURE 16 , 19 View FIGURE 19 , 20N View FIGURE 20 ‒P, 21G View FIGURE 21 )

Type material. Holotype: male (15.7 × 15.0 mm), MZB Cru 5627, Sungai Tipoeka, Timika , Papua, 28 June 2000 . Paratypes: 2 males (7.6 × 6.7 mm, 15.6 × 14.8 mm), 6 females (12.8 × 11.8 mm ‒ 13.2 × 12.3 mm; one badly damaged), ZRC 2000.2077 View Materials , (13.4 × 12.2 mm) , 3 females (12.5 × 11.4 mm ‒ 13.7 × 12.6 mm), MZB Cru 5628, same locality as holotype .

Other material examined. All localities in Papua, Indonesia, collected by A. Darmawan. 1 male (11.0 × 10.6 mm), 1 female (11.0 × 10.6 mm), ZRC 2022.0750 View Materials , station Mi, 5°01'20.89"S 137°05'42.73"E, 4 June 2021 GoogleMaps ; 3 males (10.8 × 10.8 mm – 12.6 × 12.2 mm) 1 female (11.0 × 11.0 mm), MZB Cru 5629, same locality, 6 October 2021 GoogleMaps ; 1 male (16.4 × 16.0 mm), 1 females (13.8 × 13.4) 1 ovigerous female (15.8 × 14.8 mm), MZB Cru 5630, same locality, 11 March 2020 GoogleMaps ; 2 males (11.4 × 10.6 mm, 12.4 × 11.6 mm), MZB Cru 5631, station OT5, 5°06'33.91"S 137°14'32.47"E, 7 October 2021 GoogleMaps ; 2 males (14.0 × 13.4 mm, 14.4 × 13.6 mm), 3 females (13.0 × 12.6 mm ‒ 16.2 × 15.6 mm), ZRC 2022.0745 View Materials , station OT5, 5°06'33.91"S 137°14'32.47"E, 8 October 2020 GoogleMaps ; 2 males (11.8 × 11.4 mm, 13.0 × 11.8 mm), ZRC 2022.0747 View Materials , station EM 330, 4°48.900"S 136°38.731", 26 May 2021 ; 1 male (11.2 × 10.8 mm), ZRC 2022.1028 View Materials , T5 , 4°55'04.64"S 136°42'16.25"E, 9 June 2021 GoogleMaps ; 3 males (11.6 × 11.1 mm, 12 × 11.6 mm, 11.3 × 11.1 mm), 1 ovigerous female (12.0 × 11.6 mm), MZB Cru 5632, station Ma, 5°02'16.56"S 137°05'42.73"E, 8 October 2020 GoogleMaps ; 3 males (12.0 × 11.5 mm, 12.2 × 11.6 mm, 11.5 × 11.1 mm), 1 ovigerous female (10.5 × 10.5 mm), ZRC 2022.1029 View Materials , station Ma , 5°02'16.56"S 137°05'42.73"E, 8 October 2020 GoogleMaps ; 2 males, 2 females, ZRC 2022.0748 View Materials , station A1, 4°57'49.75"S 136°49'47.53"E, 13 October 2020 GoogleMaps ; 1 male, 2 females, ZRC 2022.0749 View Materials , station T5 , 4°55'04.64"S 136°42'16.25"E, 4 October 2021 GoogleMaps ; 2 males (larger 12.4 × 11.9 mm), 4 females (largest 12.9 × 12.6 mm), ZRC 2022.0746 View Materials , station K1, trawl, 4°º49'19.67"S 136°35'06.14"E, 21 March 2022 ; 1 male (12.7 × 12.4 mm), ZRC 2022.1031 View Materials , station OT5, 5°06'33.91"S 137°14'32.47"E, 8 October 2020 GoogleMaps .

Diagnosis. Carapace slightly broader than long ( Figs. 5C, D View FIGURE 5 , 6G View FIGURE 6 ); dorsal surface of carapace covered with closely spaced minute granules, gastric, branchial and intestinal regions with slightly larger, more prominent granules. Frontal margin granulated; postfrontal lobe slightly convex ( Fig. 11I, J View FIGURE 11 ). Endostomial spines absent ( Figs. 13M, N View FIGURE 13 , 14G, H View FIGURE 14 ). Lateral margin of carapace with row of small granules, interspersed by large granules formed by group of small granules; posterolateral margin very slightly convex with large granule medially and on each posterolateral border ( Figs. 5C, D View FIGURE 5 , 6G View FIGURE 6 ). Posterior carapace margin almost straight, with larger granule medially and on each posterolateral corner, with margin between them almost straight ( Figs. 5C, D View FIGURE 5 , 10I, J View FIGURE 10 ). Third maxilliped exopod 2.3 times as long as broad, wider than basal part of endopod, forming petaliform structure with strongly convex outer margin; endopod with completely fused basis-ischium, as long as merus, with shallow submarginal sulcus near inner margin; ( Figs. 11I, J View FIGURE 11 , 19A, G View FIGURE 19 ). Chelipeds subequal; merus, carpus and chela surfaces smooth or covered with low, small rounded granules ( Figs.5C View FIGURE 5 , 6G View FIGURE 6 ); surfaces of merus, carpus and propodus covered by closely spaced small granules; merus subcylindrical, anterior and posterior margin with row of granules; carpus anterior margin with row of larger granules; chela stout, upper and lower margins with row of granules, longitudinal row of relatively large granules on lower outer surface of palm; fingers longer than length of palm; pollex slightly bent, cutting edge lined with denticles, shallow concavity submedially; dactylus 1.3 times as long as palm, with row of small granules on upper margin, cutting edge with median large tooth lined with denticles, remaining of edge with small denticles ( Fig. 15I, J View FIGURE 15 ). P2–P5 slender, short; merus distinctly longer than carpus and propodus; dactylus longer than propodus, lanceolate, terminating in corneous tips; fourth leg shortest with merus 4 times as long as broad, lined with small granules on ventral margin ( Fig. 16J, K View FIGURE 16 ). Thoracic sternites transversely narrow, surface finely granulated, larger granules laterally; sternites 1–3 completely fused without trace of sutures; sternite 3 separated from sternite 4 by shallow groove; sternites 4–7 progressively narrower sternite 8 narrowest ( Fig. 8E, F View FIGURE 8 ). Male sternopleonal cavity deep, reaching to proximal distance between fused thoracic sternites 1–3, margin lined with granules, those on distal part proportionately larger. Male pleon narrow, slender, long ( Figs. 8E, F View FIGURE 8 , 19B, H View FIGURE 19 ); somite 1 longitudinally narrow, wide; somites 2–6 fused, forming elongate trapezoidal plate, shallow suture just visible between somites 5 and 6, surface smooth; somite 6 longitudinally subrectangular, surface with one low granule medially, lateral margins gently convex; telson triangular, longer than wide. G1 elongate, slender, slightly dilated in distal area; distal process moderately long, gently bent, with pointed tip ( Fig. 19C‒F, I, J View FIGURE 19 ). Female sternopleonal cavity reaches distal part of sternite 1; female pleon broad, convex, margin densely tuberculate; somite 1, 2, covered by tubercle; somites 2‒6 fused, suture between somites 2 and 3; telson shorter than its basal width ( Fig. 9G View FIGURE 9 ); vulvae positioned close to median part of sternite 6, each opening V-shaped, relatively short, narrow, without opercular cover ( Fig. 21G View FIGURE 21 ).

Colour. Dorsal surface of carapace and chelipeds dirty white to pale yellow, with legs reddish brown.

Etymology. The name is derived from the Latin “ bellus ” for beauty and “ granosa ” for granules; alluding to the beautiful arrangement of sharp granules on the carapace of the species. It is also an indirect acknowledgement to the lady who revised Philyra and has contributed substantially to our knowledge of leucosiid systematics; our friend Bella Galil.

Remarks. Lyphira bellagrana n. sp. is very characteristic in having the lateral margin of the carapace lined with small tubercles interspersed by larger tubercles that are formed by a clustering of small tubercles. The morphological characters generally resemble L. heterograna s. str. in the absence of endostomial spines, and a very slightly bent distal process of G1 ( Figs. 13A, B, M, N View FIGURE 13 , 14A,G, H View FIGURE 14 , 17E, F View FIGURE 17 , 19E, F, J View FIGURE 19 ), but differences can be seen in the broader and more convex third maxilliped exopod, shorter P5 merus, shorter distal process of G1, stouter male pleon of L. bellagrana n. sp. ( Figs. 11I, J View FIGURE 11 , 16J, K View FIGURE 16 , 19A, G View FIGURE 19 , versus Figs. 11A, B View FIGURE 11 , 16A, B View FIGURE 16 , 17E, F View FIGURE 17 ).

There is one specimen of L. bellagrana n. sp. (ZRC 2022.1031) which is unusual in having corneous spinules on the carapace, chelipeds and third maxilliped, with the granules on the thoracic sternum and male pleon more developed ( Figs.5D View FIGURE 5 , 8F View FIGURE 8 , 15J View FIGURE 15 , 19G View FIGURE 19 ). This is something shared with L. linda n. sp. (see discussion earlier for that species). It agrees with typical specimens, however, in all other characters, including the diagnostic G1 structure ( Fig. 19C‒F, I, J View FIGURE 19 , 20N‒P View FIGURE 20 ). The G1 distal process is slightly longer ( Figs. 19I, J View FIGURE 19 , 20N View FIGURE 20 ) in this specimen than typical specimens ( Figs. 19C‒F View FIGURE 19 , 20O View FIGURE 20 ) but this difference is too slight to be considered significant. In addition, all the other specimens from the same area are of the typical form.