Nototanoides oliveri Morales-Núñez & Ramos-Tafur 2023, sp. nov.
Creators: name: Morales-Núñez, Andrés G.
name: Ramos-Tafur, Gabriel E.
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Malacostraca
Tanaidacea
Nototanaidae
Nototanoides
Nototanoides oliveri

description: Nototanoides oliveri sp. nov.
(Figs. 3–14, 16B, F, J, N, R, 17–18)
Nototanoides trifurcatus Sieg & Heard 1985: 52. (in part)
Diagnosis. Female. Antennule with article-3 bearing row of ~11 aesthetascs on sub-proximal ventral margin. Left mandible lacinia mobilis with eight denticles. Maxilliped palp article-2 with mid inner margin setulose and inner distal margin with modified spiniform seta with about four to five setules on dorsal margin and one setule on ventral margin. Cheliped with fixed finger having one sinuate seta on outer incisive margin, chela with six simple setae on ventral margin, and dactylus integument covered by scales. Pleopods with inner margin setulose.
Male. Antennule with article-4 bearing row of ~9–10 aesthetascs on sub-proximal ventral margin. Cheliped with basis having mid-ventral margin swollen, forming a rounded apophysis/protuberance, and chela with seven simple setae on ventral margin.
Etymology. This species is named in honor to Oliver Morales-Sierra, the beloved son of the senior author.
Material examined. Type material. Holotype (USNM 1606640), ovigerous ♀, TBL 3.6 mm, eastern Gulf of Mexico, Florida, ~170 Km E off New Port Richey, 28°25'55''N – 84°41'39''W, depth 64 m, 09 June 2017, station SMP171702013, R / V Tommy Munro, bottom trawl.
Paratypes: 40 non-ovigerous ♀♀ (without oostegites) (USNM 1606641), 20 ovigerous ♀♀ (USNM 1606642), 10 ♀♀ with empty marsupium (USNM 1606643), and 40 ♁♁ (USNM 1606644)), same collection data as holotype; 40 non-ovigerous ♀♀ (without oostegites (UF Arthropoda 71396)), 16 ovigerous ♀♀ (UF Arthropoda 71397), 10 ♀♀ with empty marsupium (UF Arthropoda 71398), 40 ♁♁ (UF Arthropoda 71399), same collection data as holotype; 40 non-ovigerous ♀♀ (without oostegites) (GCRL 6619), 20 ovigerous ♀♀ (GCRL 6620), 10 ♀♀ with empty marsupium (GCRL 6621), and 40 ♁♁ (GCRL 6622), same collection data as holotype; 30 non-ovigerous ♀♀ (without oostegites) and 15 ♁♁ (FSBCI 171988), same collection data as holotype; two ovigerous ♀♀ (one damage (dried out) (USNM 1462798), Project Hour Glass (Florida West Coast), 26°24’00’’N – 84°13’00’’W, depth 73.2 m, station E.
Additional specimens from the type locality are in the first author’s personal collection.
Description. Based on ovigerous ♀. Carrying ~ 28 eggs.
Body (Figs. 3A–B, 8). Dorsoventrally flattened, TBL 4.0 mm, about 5.4 times as long as wide.
Cephalothorax (Figs. 3A–B, 8A–B). About 24% of TBL; about same length that of pereonites 1–3 combined, 1.3 times longer than wide, narrowed anteriorly and gently rounded posteriorly; eyelobes present, visual elements present, with one pair of lateral simple setae posterior to eyes; rostrum blunt-rounded (Figs. 3A, 8B).
Pereon (Figs. 3A, 8A). About 50% of TBL; each pereonite wider than long, lateral distal borders rounded; pereonites 1 and 6 shorter than other pereonites; pereonites 2–5 increasing in length, being pereonite-5 longest; each pereonite with one pair of dorsoanterior lateral simple setae; pereonite-6 with pair of dorsoposterior lateral simple seta.
Pleonites (Figs. 3A, 8A). About 21% of TBL; combined length of pleonites 1–5 slightly shorter than length of pereonites 4–6, all pleonites sub-equal in length, wider than long; each with one pair of dorsolateral simple setae; pleonites 1–4 with row of ~13, 17, 19, and 15 lateral simple setae, respectively; pleonite-5 with row of ~11 lateral simple setae.
Pleotelson (Figs. 3A, C, 8A). About 5% of TBL; slightly narrower than pleonites, wider than long, trapezoidal, with acute distal tip, one pair of dorsoanterior lateral simple setae, one pair of posterior simple setae, one pair of simple and PSS setae, and four (two simple and two PSS) setae on apex.
Antennule (Fig. 4B–C). Longer than half cephalothorax length, with three articles. Article-1 longer than combined length of articles 2–3, about 3.9 times as long as wide; outer margin with two clusters of three PSS and one mid simple long seta, sub-distal outer margin with row of four (one long simple and three PSS) setae; inner margin with one mid small simple seta and one sinuate distal simple seta. Article-2 about 1.9 times as long as wide; distodorsal outer margin with simple seta; distoventral inner margin with two setae (one simple one PSS). Article-3 about 2.5 times as long as wide; ventrally with sub-proximal row of ~11 aesthetascs (Fig. 4C); distally with one PSS, one aesthetasc, and six simple setae of varying lengths.
Antenna (Fig. 4D–E). Slightly longer than length of antennule article-1. With six articles.Article-1 about 1.4 times wider than long, sub-quadrate, asetose. Article-2 about 1.2 times as long as wide, dorso proximal and mid margin with setules, distodorsal margin projected with small spine and one bipinnate seta (Fig. 4E). Article-3 about 1.1 times as long as wide, with distodorsal margin projected with small spine and one bipinnate seta. Article-4 elongate, about 4.2 times as long as wide; mid inner margin with one PSS; sub-distal outer margin with one simple seta and four PSS. Article-5 about 1.1 times as long as wide, sub-proximal outer margin bearing two PSS; sub-distal inner margin bearing a long simple seta. Article-6 minute, with distal margin having six simple setae of unequal lengths.
Mouthparts. Labrum (Fig. 4F) Sub-quadrate, finely setose.
Mandibles (Fig. 4G–H): left mandible (Fig. 4G), incisor with six denticles, lacinia mobilis broad with eight denticles; Right mandible (Fig. 4H), incisor bifid with nine denticles. Molar process of left and right mandible similar, with grinding surface showing well-developed micro-denticles (Fig. 4G–H).
Labium (Fig. 5A). With inner and reduced outer lobe.
Maxillule (Fig. 5B). Endite with nine distal spiniform setae, outer distal margin with several setules; palp bearing one bipinnate setulose seta.
Maxilla (Fig. 5C). Subovate, asetose.
Maxilliped (Figs. 5D–G, 17A–B). Basis fused, elongated, with long simple seta near palp insertion (reaching beyond distal margin of endite) (Fig. 5D). Palp article-1 slightly longer than broad, asetose; article-2 largest, widest medially, mid inner margin setulose, and inner distal margin with two simple setae and one modified spiniform seta and inner distal margin with modified spiniform seta with about four to five setules on dorsal margin and one setule on ventral margin (Figs. 5D–E, 17A–B); article-3 with inner margin having three inner very finely bipinnate setae (Fig. 5D), three sub-distal small simple setae (Fig. 5D), and one simple seta (Fig. 5F); article-4 inner margin with five inner very finely bipinnate setae, outer margin with sub-distal inner very finely bipinnate setae (Fig. 5D). Endite distally separated; each distal inner margin bearing two simple setae of unequal lengths and two short flat tubercles or “membranous hemispherical structures” (Sieg & Heard 1985); outer margin setulose (Fig. 5G).
Epignath (Fig. 5H). Falciform, with short setae at tip.
Cheliped (Figs. 6A–E, 18C). Similar in shape and size. Basis about 1.5 times as long as wide, posterior margin reaching pereonite-1; mid-ventral margin smooth, without rounded apophysis/protuberance; with sub-distal dorsal simple seta on outer margin. Merus sub-triangular, with simple seta on mid-ventral margin. Carpus about 1.6 times as long as wide; sub-distal ventral margin with two simple setae; dorsal margin setulose proximally, with two (one proximal and one distal) small simple setae. Propodus 1.6 times as long as wide, palm longer than fixed finger; ventral margin with three simple setae; outer margin with simple seta near to insertion of dactylus; inner margin with one long bipinnate seta and a row comb of ~16 small bipinnate setae near to articulation of dactylus (Fig. 6F); fixed finger with three ventral setae (Fig. 6A, C); with three (one sinuate (Fig. 6B) and two simple) sub-marginal setae on outer incisive margin (Fig. 6A), reduced rounded tooth, and one outer distal rectangular lamellar projection. Dactylus and unguis curved downward, longer than fixed finger, with row of ~nine spines ventrally (Fig. 6A); inner face with bipinnate seta on sub-proximal margin (Fig. 6C–D), integument covered by scales (Figs. 6E, 17C).
Pereopod-1 (Figs. 7A–B, 17D). Coxa with simple seta on anterodistal margin. Basis about 5.2 times as long as wide; sub-proximal dorsal margin with two simple seta and one PSS. Ischium wider than long, with simple seta on ventral margin. Merus slightly shorter than carpus, about 1.8 time as long as wide, obliquely articulated with carpus; inner margin with sub-distal simple seta. Carpus about 1.6 times as long as wide; distoventral margin with three distal simple setae; subdistal inner margin with one simple seta; subdistal dorsal margin with simple seta. Propodus about 2.9 times as long as wide; subdistal ventral margin with simple seta; with crown of small lanceolate setae over articulation with dactylus (Figs. 7B, 17D); subdistal dorsal margin with simple seta. Dactylus together with unguis shorter than propodus; dactylus shorter than unguis, with sub-proximal seta.
Pereopod-2 (Fig. 7C–E). Coxa with simple seta on anterodistal margin. Basis wider than pereopod-1, about 2.8 times as long as wide; sub-proximal dorsal margin with simple seta and two PSS. Ischium wider than long, with simple seta on ventral margin. Merus shorter than carpus, about 1.4 time as long as wide, obliquely articulated with carpus; sub-distal ventral margin with two thin simple setae. Carpus about 1.8 times as long as wide, with four distal thick bipinnate setae (Fig. 7D). Propodus about 2.7 times as long as wide; sub-distal ventral margin bearing a thick bipinnate seta (Fig. 7E); distally with crown of lanceolate setae as in pereopod-1. Dactylus together with unguis shorter than propodus; dactylus shorter than unguis, asetose.
Pereopod-3 (Fig. 7F). Similar to pereopod-2, but basis slightly longer. Carpus with three distal thick bipinnate setae.
Pereopod-4 (Fig. 7G–K). Without coxa. Basis about 2.3 times as long as wide; sub-distal ventral margin with two PSS; sub-proximal dorsal margin with two PSS. Ischium wider than long, with two simple setae on ventral margin. Merus slightly shorter than carpus, about 1.5 times as long as wide, with two distoventral thick bipinnate setae (Fig. 7H). Carpus about 1.7 times as long as wide, sub-distal dorsal margin bearing simple seta; distal margin with four thick bipinnate setae (Fig. 7I). Propodus about 3.8 times as long as wide; sub-distal ventral margin with two thin bipinnate setae (Fig. 7J); with crown of lanceolate setae over articulation with dactylus; dorsal margin with mid PSS and one distodorsal thin bipinnate setae (Fig. 7K). Dactylus and unguis curved, dactylus together with unguis shorter than propodus, dactylus with thick basal part and longer than unguis, dactylus with sub-proximal dorsal and distal margins setulose.
Pereopod-5 (Fig. 7L). Similar to peropod-4, but longer. Basis having only two PSS on sub-proximal dorsal margin.
Pereopod-6 (Fig. 7M). Similar to pereopod-5, but longer. Basis asetose. Propodus with three thin bipinnate setae on sub-distal dorsal margin.
Pleopods (Fig. 7N). Five similar, well-developed, biramous pairs. Basal article nearly as long as wide, shorter than both rami with inner margin setulose. Exopod uniarticulate, with outer and distal margins bearing ~37 long plumose setae, inner dorsal margin setulose. Endopod uniarticulate, with outer and distal margins bearing ~22 long plumose setae, distal ones modified with whip-like tip; sub-distal lateral margin with seta modified with whip-like tip, inner dorsal margin setulose.
Uropods (Fig. 7O). Shorter than pleotelson. Basal article about 1.1 times as long as wide, asetose. Exopod bi-articulated, shorter than endopod articles, article-1 about 2.2 times as long as wide, with simple seta on distal outer margin; article-2 about 2.5 times as long as wide, shorter than exopod article-1, with two distal simple setae of unequal lengths. Endopod bi-articulated, article-1 about 1.6 times as long as wide, with simple seta and PSS on distal inner margin and oblique row of eight PSS on outer margin. Article-2 about 1.9 times as long as wide, shorter than endopod article-1, with one PSS on inner distal margin and five simple setae of varying lengths distally.
description: Published as part of Morales-Núñez, Andrés G. & Ramos-Tafur, Gabriel E., 2023, Nototanoides oliveri, a new sponge-dwelling nototanaid tanaidacean (Crustacea Tanaidomorpha, Tanaidacea) from eastern Gulf of Mexico, with an illustrated taxonomic key, and the first record of harpacticoid copepods within the marsupium of ovigerous female tanaids, pp. 242-270 in Zootaxa 5346 (3) on pages 247-251, DOI: 10.11646/zootaxa.5346.3.2, http://zenodo.org/record/8390019