Five new coexisting species of copepod crustaceans of the genus Spaniomolgus (Poecilostomatoida: Rhynchomolgidae), symbionts of the stony coral Stylophorapistillata (Scleractinia) Conradi, Mercedes Bandera, Eugenia Mudrova, Sofya V. Viatcheslav N. Ivanenko, ZooKeys 2018 791 71 95 6YW8T http://zoobank.org/56C93061-E2C5-47E5-8A3C-977D264B169E Copepoda Rhynchomolgidae Spaniomolgus CoL Animalia Spaniomolgus stylophorus Cyclopoida 11 82 Arthropoda species stylophorus  Type locality. Saudi Arabian Red Sea, reef near Thuwal, 22°12'04.30"N, 38°57'31.40"E.  Material examined. 1 ♀ holotype (ZMMU Me-1211) and 1 ♀ paratype (ZMMU Me-1212) from Stylophora pistillata(KAUST SA2013-12) collected at 1 m depth in the inner part of the reef; 1 additional ♀ from Stylophora pistillata(morphotype S. danae) (KAUST SA2013-31) collected at 28 m depth in the outer part of reef ( 22°20'23.45"N, 38°50'52.33"E).  Etymology. The specific epithet stylophorusrefers to the host name Stylophora.  Description. Adult female. Body cyclopiform, with oval cephalothorax and cylindrical urosome (Figs 8a, 9b). Mean body length 1.15 mm (with range of 1.1 - 1.2 mm) and mean maximum width 365 µm(with range of 320 - 410 µm), based on two specimens. Somite bearing Sixth leg 1 completely separated from cephalosome. Epimeral areas of metasomal somites slightly angular. Fourth pedigerous somite smaller than preceding ones, its epimeral areas not visible in dorsal view.  Figure 8. Spaniomolgus stylophorussp. n., female. a Habitus dorsal b Urosome dorsal c Antenna d Maxilliped e Leg 4. Scale bars: 300 µm(a); 100 µm(b); 50 µm(c-e). Urosome 5-segmented, comprising fifth pedigerous somite, genital double-somite and three free abdominal somites (Fig. 8b). In dorsal view, only the postgenital somites visible. Leg 5-bearing somite slightly wider than long. Genital double-somite (Fig. 8b) bell-shaped; 170 µmminimum width (anterior half), 220 µmmaximum width (posterior half) and 155 µmlong; shorter dorsally than ventrally. Paired genital apertures bipartite, each comprising ventrolateral copulatory pore and dorsolateral gonopore (oviduct opening). Each genital area with two minute spiniform setae (Fig. 8b). Egg sac unknown. Three postgenital somites 120 x180, 120 x130 and 94 x110 μmfrom anterior to posterior.  Caudalrami (Fig. 8b) elongated, 200 x45 µm, 4.4 times as long as wide. With six setae, all relatively short and naked. Outer lateral seta 40 µm, outermost terminal seta 40 µm, innermost terminal seta 30 µm. Two median terminal setae broadened, 50 µm(outer) and 60 µm(inner) in length. Dorsal seta 25 µm. Rostral area with hyaline setules (Fig. 9c, d). Antennule, mandible, maxillule, maxilla and armature formula for legs 1-4 as for Spaniomolgus globussp. n. Antenna (Fig. 8c) 3-segmented; first segment 80µm long with small terminal hyaline seta; second segment 115 µmlong with a seta medially; third segment 78 µmlong with three hyaline setae medially, and two apical hyaline setae, with small recurved terminal claw 30 µmlong. Length ratio of second to third segments (measured along inner margin) 1.5:1.  Maxilliped(Fig. 8d) 3-segmented; first segment unarmed; second segment robust, with two naked inner setae; third segment claw-like, with two setae medially equal in length; apex with pore. Leg 4 (Fig. 8e) with 3-segmented exopod and 2-segmented endopod. Inner coxal seta and outer basal seta short and naked. Endopod reaching beyond middle of third exopodal segment, with two apical spines unequal in length, outer 38 µmand inner 70 µm, the latter spines with hyaline and serrated margins. Outer spines of exopod with smooth lamellae. Leg 5 (Fig. 8b) with protopod incorporated into somite; outer basal seta naked. Free segment long, slender and recurved, 5.0 times as long as wide, bearing two apical setae unequal in length, inner most more than twice the length of outer one. Male unknown.