Neogonodactylus lalibertadensis Schmitt 1940
Creators: name: Salgado-Barragán, José
name: Hendrickx, Michel E.
name: Galván-Villa, Cristian M.
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Stomatopoda
Gonodactylidae
Neogonodactylus
Neogonodactylus lalibertadensis

description: Neogonodactylus lalibertadensis (Schmitt, 1940)
(Figs. 1–3)
Gonodactylus festae lalibertadensis Schmitt, 1940: 223, text fig. 33 a, b.
Gonodactylus lalibertadensis.—Manning, 1974: 102; Reaka & Manning, 1980: 5 (list).
Neogonodactylus lalibertadensis.— Manning, 1995: 80 (list); Salgado-Barragán & Hendrickx, 1998: 47, fig. 4.
Material examined. Oaxaca. Playa La Entrega, La Crucecita (15°44’37”N; 96°07’41”W), Apr 8, 1998, 2–3 m, rocks, algae, sand, 1 male (TL 12 mm) (EMU 9277). Puerto Angel (15°39’50”N; 96°29’40”W), 3–4 m, Apr 10, 1998, 2–3 m, rocks, algae, sand, 1 male (TL 18.5 mm). Guerrero. Puerto Marquéz (16°48’21”N; 99°50’14”W), Apr 6, 1998, 1–2 m, rocks, algae, 1 female (TL 13 mm) (EMU 9452).
Michoacán. Bahía Petacalco (17°59’17”N; 102°07’20”W), Aug 26, 2009, 25 m, rocks, 1 female (TL 20.8 mm) (EMU 9278). Jalisco. Bahía Chamela: Isla Pajarera (19°33’26”N; 105°06’48”W), Apr 23, 2009, 18 m, rocks on sand, SCUBA diving, 2 females (TL 23 and 24.6 mm) and 1 male (TL 17.4 mm) (EMU 9280). Isla Cocinas (19°32’47”N; 105°06’33”W), Apr 23, 2009, 18 m, rocks on sand, SCUBA diving, 2 males (TL 16.9 and 18.6 mm) (EMU 9281). Isla Mamut (19°32’52”N; 105°06’56”W), Apr 24, 2009, 6 m, rocks on sand, SCUBA diving, 1 female (TL 12.5 mm) (EMU 9282). Isla San Agustín (19°32’07”N; 105°13’70”W), Apr 24, 2009, 6 m, rocks, sand, SCUBA diving, 1 female TL 15 mm (EMU 9451). Sinaloa. Bahía de Mazatlán; Punta Chile (23°12’30”N; 106°25’33”W), May 18, 2005, 2-3 m, rocks, sand, algae, benthic dredge, 1 female (TL 25 mm) (EMU 9283). Playa Norte (23°12’33”N; 106°25’31”W), May 19, 2006, 2–3 m, rocks on sand, benthic dredge, 1 male (TL 25 mm) (EMU 9284). Casa del Marino (23°12’20”N; 106°25’46”W), Jun 9, 2009, 3–4 m, rocks, SCUBA diving, 1 female (TL 41 mm) (EMU 9285). Isla Venados (23°13’57”N; 106°27’42”W), Jun 10, 2009, 4–5 m, rocks, SCUBA diving, 2 females (TL 12 and 36.6 mm) (EMU 9286). Isla Pájaros (23°15’13”N; 106°28’23”W), Oct 26, 2005, 4–5 m, rocks, snorkeling, 2 females (TL 11.7 and 27.0 mm) (EMU 9287).
Additional material examined. Photographs of the anterior portion of body and telson of the holotype of Neogonodactylus lalibertadensis (USNM 76394) (Fig. 1).
Redescription. Size small. Rostral plate slightly longer than broad, anterolateral margins rounded, median spine more than 1.5 times as long as basal part of plate. Ocular segment elongated or short; anterolateral angles of rostral plate acute but not spiniform (Figs. 1 A, 2A, C); when ocular segment not elongated, anterolateral angles of rostral plate contiguous to the proximal margin of ocular peduncles; ocular scales subquadrate to subrectangular, erected in lateral view, laterally projected (Figs. 3 A, C). Anterior 5 abdominal somites unarmed posterolaterally; sixth somite with 6 carinae, each with sharp posterior spine. Telson of Oerstedii-type, with dorsal spinules on carinae; anterior tubercles of telson blunt median carina arched dorsally and lateral margins straight to markedly sinuous, with posterior spine; accessory median carinae long, almost as long as median carinae, terminated in spine, not fused posteriorly with median, straight to irregularly sinuous, terminating in a spine, lateral spinules distributed along it in a variable number, from 1/1 to 5/7 (usually 3); anterior submedian carinae slender, excavated dorsally to form a small anterior mesial ridge occasionally ending in a spinule, flanked by a lateral ridge with 1–6 distal spinules or tubercles; knob evenly rounded with 2–6 marginal spinules and tubercles (2 in small specimens), plus two small inner spinules in the largest female; carinae of submedian teeth with 2–6 dorsal spinules or tubercles in one or two rows; three pairs of marginal teeth, lateral distinct, without an inner spinule; 10–12 submedian denticles; 2 intermediate marginal denticles, mesial with a dorsal tubercle armed with a spinule in the two largest specimens (Fig. 2 D). Outer margin of uropodal exopod with 10 or 11 spines.
Color. Body of preserved material light brown. Some specimens without chromatophores or any particular mark, while other specimens feature series of chromatophores following the pattern described by Salgado- Barragán & Hendrickx (1998) for that species. Thoracic and abdominal segments with submedian black spots, those of the fifth thoracic, first and fifth abdominal somites larger, long, slightly curved; abdominal somites 1–5 with a small spot in the posterolateral portion; no chromatophores on telson, except for one specimen from Bahía Chamela bearing four anterior spots, resembling those described for N. costaricensis by Manning & Reaka (1979) (Fig. 3 D).
Habitat and distribution. Bahía Chilenos, Baja California Sur to La Libertad, Ecuador, from intertidal to 25 m, among rocks with algae and sponges (Salgado-Barragán & Hendrickx 1998).
Remarks. The specimens examined herein match with the original description of N. lalibertadensis by Schmitt (1940). However, Schmitt did not indicate that the ocular somite of the holotype appears elongated, nor did he mention that the median and the accessory median carinae of telson feature sinuous margins, as shown in the holotype and some of the examined specimens (Figs. 1–2). This combination of characters is present in most of the collected specimens. In these, an elongated ocular somite is also observed, with the ocular scales located beyond the base of the rostral plate. On the other hand, the dorsal median and accessory median carinae are both sinuous. In the second series of specimens examined herein the ocular somite appears much shorter and, consequently, the basis of the ocular peduncle is adjacent to the anterolateral angle of the rostral plate, and the anterolateral angles of the rostral plate are located much anteriorly to the base of the ocular peduncles; in these organisms, the ocular scales appear shorter and laterally projected, located almost beneath the basis of the rostral plate. The elongate ocular somite, however, might be the result of how the specimen was preserved. In this second group, the median and accessory median carinae of the telson are straight, while in the holotype those carinae are irregular or markedly sinuous (Fig. 1). In this case, this variation might reflect previous damage to the telson of examined specimens. The specimens examined herein feature a greater interval of dorsal spines on the carinae of telson than previously reported; larger specimens bear more spines on the knob, on the accessory median carinae, the anterior submedian carinae, and on the accessory intermediate carinae; in addition, there is a spinule on the mesial intermediate marginal denticle of the two largest specimens (Fig. 2 D). On the other hand, all the specimens of the second group bear only 2 spinules in a row on the submedian carina (plus a small tubercle on left carina in one specimen), whereas only 2/2 spines can be seen in young specimens of the first group (Fig. 3). Thus, the ranges for the number of spines for N. lalibertadensis are as follows: 1–6 on the accessory median carina; 2–6 on the submedian carina; 2–6 on the knob; and 1–7 on the accessory intermediate carinae. These variations have not been noted before for this species and further observations might show something more significant than just intraspecific variations. Neogonodactylus lalibertadensis can be separated from its eastern Pacific congeners by the combination of several characters. The anterolateral angles of the rostral plate are acute, blunt, not sharp or spiniform as in N. festae, N. bahiahondensis and N. costaricensis. It also differs from N. festae by the absence of a short, anchor-shaped median accessory carinae and of an inner spinule on the lateral teeth of telson. The presence of 1–7 spines on the accessory median carinae in N. lalibertadensis (commonly 2 or more) also separates it from N. bahiahondensis, N. albicinctus, and N. costaricensis (only one single, terminal spine is the later three species).
description: Published as part of Salgado-Barragán, José, Hendrickx, Michel E. & Galván-Villa, Cristian M., 2013, New records of gonodactylids (Crustacea: Stomatopoda: Gonodactylidae) from the Pacific Coast of Mexico with remarks on the morphology of Neogonodactylus lalibertadensis (Schmitt, 1940), pp. 155-162 in Zootaxa 3681 (2) on pages 157-160, DOI: 10.11646/zootaxa.3681.2.4, http://zenodo.org/record/220724