Anchistioides antiguensis Schmitt 1924
Creators: name: Cardoso, Irene
Publisher: name: Zenodo
Year: 2006
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Decapoda
Anchistioididae
Anchistioides
Anchistioides antiguensis

description: Anchistioides antiguensis (Schmitt, 1924)
(Figs. 3–6)
Periclimenes antiguensis Schmitt, 1924: 84.
Periclimenes barbadensis Schmitt, 1924: pls. 3, 4.
Anchistioides antiguensis Gordon, 1935: 135; Gurney, 1936: 619; Holthuis, 1951a:175; Chace, 1972: 24.
Material examined: 20o24´10”S, 39o55´35”W, 50m, 1 female (6.5mm), MNRJ 17737.
Diagnosis: Carapace rostrum upper margin with 8–10 teeth, lower margin with 5–8 teeth; antennal spine and postorbital tubercle present. Stylocerite with rounded apex, half of basal antennular article length. Scaphocerite with strong terminal tooth overreaching end of blade. Telson with 3 pairs of dorsolateral cuspidate setae and one pair of distal setae Description: Carapace with rostrum long, overreaching end of scaphocerite, upper margin with 8 teeth, lower margin with 5 teeth; with small antennal spine and a postorbital tubercle; without hepatic and branchiostegal spines (Fig. 3 A). Stylocerite with rounded apex, half basal antennular article length, anterolateral tooth reaching half of second antennular article (Fig. 3 B). Scaphocerite with distal tooth strong, distinctly overreaching end of blade (Fig. 3 C). Mandible, incisor process formed by 3 strong teeth; molar process formed by large crests with small spines; palp absent (Fig. 4 A). Maxilla 1, distal endite with 5 long cuspidate setae on inner margin; basal endite with 8 cuspidate setae and one pappose seta on inner margin; palp with a curved projection (Fig. 4 B). Maxilla 2, scaphognathite with densely plumose setae on all margins; endopod one-fourth of scaphognathite length; endite with several simple setae on inner margin (Fig. 4 C). Maxilliped 1, exopodal lobe broad, with plumose setae on outer margin; slender exopod with densely plumose setae on apex; endopod one-third of exopod length; endite elongate, with sparse serrulate setae on inner margin (Fig. 4 D). Maxilliped 2 with ischium and merus elongate; carpus short; curved propodus, with long cuspidate serrulate seta on distal and inner margins; dactylus with cuspidate serrulate and serrulate setae on inner margin; exopod elongate with plumose setae on all margins (Fig. 4 E). Maxilliped 3 with simple setae on all articles, without exopod (Fig. 4 F). Pereopod 1 with carpus longer than propodus; dactylus slightly overreaching propodal length; propodus and dactylus with dense tufts of simple setae distally (Fig. 5 A). Pereopod 2 longer and much stronger than first, dactylus more than half propodal length; tips of propodus and dactylus crossing one to another (Fig. 5 B). Pereopod 3 to 5 slender, biunguiculate, the inner tooth small. Pereopod 3, propodus with 10 cuspidate setae on inner margin (Fig. 5 C). Pereopod 4, propodus with 8 cuspidate setae on inner margin (Fig. 5 D). Pereopod 5 longer than pereopod 3–4, propodus with tufts of simple setae on inner margin (Fig. 5 E). Female endopod of pleopod 1 leaf like with plumose articulated setae on all margins, and a distal lobe rounded, with hook setae on tip (Fig. 6 A). Female endopod of pleopod 2 with slender appendix interna, half endopod length, with hook setae on tip (Fig. 6 B). Telson with 3 pairs of dorsolateral cuspidate setae; the distal one very small; one pair of distal cuspidate setae and one distal pair of slender simple setae (Fig. 6 C). Endopod of uropod with incomplete diaresis; lateral margin ending in sharp triangular projection; with a posterolateral tooth that not overreaches exopod (Fig. 6 C).
Distribution: Western Atlantic Ocean: Bermuda, Antigua, Tortuga, west coast of Florida, Bahamas, Yucatan, Virgin Islands, Brazilian coast (Maranhão, Pernambuco, Alagoas and Espírito Santo).
Remarks: The genus Anchistioides comprises four species, only A. antiguensis is recorded in the Western Atlantic Ocean.
The specimen examined herein agrees with Holthuis’ (1951a) description in having a postocular tubercle, 8 dorsal teeth on rostrum, scaphocerite distal tooth overreaching blade, stylocerite with triangular shape, mouth parts shape and setae pattern, and shape of pereopods 1 and 2. Only two small differences were observed between Holthuis’ (1951a) description and the material herein examined: his material has 7 ventral teeth on rostrum and the dorsolateral cuspidate setae on telson more lateral; the present material has 6 ventral teeth on rostrum and the dorsolateral cuspidate setae on telson more dorsal.
description: Published as part of Cardoso, Irene, 2006, Caridea (Crustacea, Decapoda) collected on the Brazilian (13 / 22 S) continental shelf and slope, pp. 1-44 in Zootaxa 1364 on pages 6-10, DOI: 10.5281/zenodo.174755