taxonID	type	description	language	source
EC65E544FF873649954CFCA9FEBAFDAC.taxon	description	(Figs 2 - 4) urn: lsid: zoobank. org: act: 2 CFF 365 E- 2 D 43 - 468 E-AC 9 F- 40 FDA 7 DA 434 C	en	Tatiana Magalhães, Lucas Oliveira-Rogeri, Darryl L. Felder, Fernando L. Mantelatto, (2026): A new species of Pilumnus Leach, 1816 (Decapoda, Brachyura) from Guadeloupe, Lesser Antilles, with morphological comparisons to regional congeners. Zoosystema 48 (16): 389-399, DOI: 10.5252/zoosystema2026v48a16
EC65E544FF873649954CFCA9FEBAFDAC.taxon	materials_examined	TYPE MATERIAL. — Holotype. Guadeloupe • 1 ♂ (CW = 6.44 mm, CL = 5.25 mm); Grande-Terre, îlet du Gosier; KARUBENTHOS 2012; st. GD 52; 6 m b. s. l.; 16 ° 12 ’ 5.46 ” N, 61 ° 29 ’ 42.36 ” W; 23. V. 2012; MNHN-IU- 2013 - 16321. MOLECULAR SEQUENCES. — MF 504071 (16 S), MF 504144 (COI). TYPE LOCALITY. — The type locality of the species is îlet du Gosier, Guadeloupe, and this is the only recorded occurrence of the species.	en	Tatiana Magalhães, Lucas Oliveira-Rogeri, Darryl L. Felder, Fernando L. Mantelatto, (2026): A new species of Pilumnus Leach, 1816 (Decapoda, Brachyura) from Guadeloupe, Lesser Antilles, with morphological comparisons to regional congeners. Zoosystema 48 (16): 389-399, DOI: 10.5252/zoosystema2026v48a16
EC65E544FF873649954CFCA9FEBAFDAC.taxon	etymology	ETYMOLOGY. — The specific epithet guadeloupensis refers to Guadeloupe, the type locality of the species, and it is used here as an adjective.	en	Tatiana Magalhães, Lucas Oliveira-Rogeri, Darryl L. Felder, Fernando L. Mantelatto, (2026): A new species of Pilumnus Leach, 1816 (Decapoda, Brachyura) from Guadeloupe, Lesser Antilles, with morphological comparisons to regional congeners. Zoosystema 48 (16): 389-399, DOI: 10.5252/zoosystema2026v48a16
EC65E544FF873649954CFCA9FEBAFDAC.taxon	diagnosis	DIAGNOSIS. — Carapace anterodorsally with short pubescence; frontal, protogastric, and hepatic regions of dorsal surface with strong tubercules; supraorbital margins strongly toothed; anterolateral margin with four teeth, anteriormost of which formed by outer orbital tooth. Major chela palm with outer surface nearly smooth and glabrous. Ambulatory pereopods with merus dorsal margin mostly smooth, single subdistal denticle on dorsal margin of meri of pereopods 2 - 4; carpi and propodi with prominent spiniform tubercles.	en	Tatiana Magalhães, Lucas Oliveira-Rogeri, Darryl L. Felder, Fernando L. Mantelatto, (2026): A new species of Pilumnus Leach, 1816 (Decapoda, Brachyura) from Guadeloupe, Lesser Antilles, with morphological comparisons to regional congeners. Zoosystema 48 (16): 389-399, DOI: 10.5252/zoosystema2026v48a16
EC65E544FF873649954CFCA9FEBAFDAC.taxon	description	DESCRIPTION Carapace subhexagonal (Fig. 2 A), anterior and posterior regions both sloped downwards, dorsum longitudinally arched; dorsal surface with short clavate setae on most surfaces (Fig. 3 B, C), dense cover concealing surfaces anteriorly; anterior dorsal surface areolate, frontal regions (Fig. 3 B) each with one raised tubercle, protogastric regions each with two closely adjacent raised tubercles in short transverse row; two well-separated tubercles positioned approximately along the cervical depression posterolaterally to the protogastric region; hepatic regions each bearing one broadly shouldered, strong, raised tubercle; posterior carapace smooth (Figs 2 A; 3 A; 4 A). Front quadrilobed, with two wide, convex, and advanced mesial lobes, each with row of marginal setae, separated by deep median V-shaped depression, and two narrow, tooth-like, lateral lobes less advanced and separated by deep sinuse from mesial lobes (Fig. 3 A, B). Orbits wide, supraorbital margin with strong inner orbital tooth separated mesially by deep sinus from lateral lobe of front, two blunt subtriangular teeth along transverse margin, and strong tooth at outer orbital angle (forming first anterolateral tooth); suborbital margin with four tubercles. Subhepatic region with single, short spiniform tooth, visible dorsally between first and second anterolateral teeth; pterygostomial region smooth, fringed with setae (Fig. 3 D). Anterolateral margin with four acute teeth, corneous tips curved forward, anteriormost tooth formed by outer orbital tooth; inter-dental regions setose (Fig. 3 C). Third maxilliped in external view (Figs 2 B; 3 E; 4 B) with ischium subrectangular, distomesial margin forming strong right angle, mesial margin lined with small spinules and setal fringe of varied length; merus length half that of ischium, mesial margin with several long setae, with spinulose projection just proximal to merus-carpus junction; distal margin remarkably granulose, granulation extending into subdistal field; palp setose, especially propodus and dactylus; dactylus with setae exceeding article length; exopod length subequal to endopod. Chelipeds heterochelous (Fig. 2 A), dense setae on outer surface of carpus and dorsal margin of propodus, setation varied in type and size, most regions covered by short plumose setae with few long simple or plumose setae present among them. Major cheliped (Figs 2 A; 3 F; 4 A) merus with two prominent spiniform tubercles on dorsal margin; carpus outer / dorsal surface with 16 tubercles, inner margin crest below corner of article with three short spinules along edge above which is strong distal spine at inner margin corner; propodus inner and outer surfaces nearly smooth, superior margin with nine tubercles disposed in two rows; dactyl darkly pigmented, coloration not extending to palm (Figs 3 H; 4 C). Minor cheliped morphology similar to major cheliped but presenting more spiny tubercles and setae on outer upper surface of propodus (Fig. 3 G). Ambulatory leg (pereopods 2 - 5) (Figs 2 A; 3 I; 4 A) meri dorsally smooth except for single subdistal tubercle on dorsal margin and scattered setae, setae most conspicuous on ventral margin. Carpi and propodi with six or seven spiniform tubercles on dorsal margin, arranged in two longitudinal rows; dorsal setae short and plumose, lateral to ventral setae long and stiff. Dactyli lacking tubercles, ending in hooked corneous tip and scattered stiff setae; dactylo-propodal locking system present and formed by a projection on propodus distal margin, and a complementary notch on dactyl proximal margin. Thoracic sternum with sternites 1 and 2 completely fused, separated from sternite 3 by deep suture; sternites 3 and 4 faintly separated, with stiff setae; sternite 5 separated both from sternite 4 and sternite 6 by shallow sutures; sternites 6 and 7 separated by deep suture; sternite 8 not visible when pleon is closed and separated by a shallow sinus from sternite 7; sternites 1 - 3 and anterior portion of sternite 4 rough, posterior sternites smooth; median longitudinal suture of thoracic sternum not visible in sternites 1 - 3 and anterior portion of sternite 4, but visible in parts of sternites inside sternopleonal cavity, such as the posterior portion of sternite 4, and sternites 5 and 6. Within sternopleonal cavity, sternite 5 with well developed tubercle of pleonal locking mechanism, posteriorly located, near the suture between sternites 5 and 6 (Figs 2 B; 3 J-K). Pleon triangular, 6 - segmented with no fused somites; all pleonites wider than long, trapezoidal, with most anterior more subrectangular and most posterior more subquadrate; pleonite 3 widest. Telson subtriangular, length to width ratio of 0.73; length subequal to pleonite 6 (Fig. 4 E). First gonopod elongate, sinuous, proximal third slightly curved, distal third sharply hooked; apex downturned; stiff and simple setae evenly distributed, increasing gradually in length distally along sternal margin (Figs 3 L; 4 D). Second gonopod short, narrowing distally, except in the distalmost portion, which is wider, curved and flattened.	en	Tatiana Magalhães, Lucas Oliveira-Rogeri, Darryl L. Felder, Fernando L. Mantelatto, (2026): A new species of Pilumnus Leach, 1816 (Decapoda, Brachyura) from Guadeloupe, Lesser Antilles, with morphological comparisons to regional congeners. Zoosystema 48 (16): 389-399, DOI: 10.5252/zoosystema2026v48a16
