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 6YW98 http://zoobank.org/10C25D5C-ED4B-4234-B6BA-F0B3988225B7 Copepoda Rhynchomolgidae Spaniomolgus CoL Animalia Spaniomolgus acutus Cyclopoida 8 79 Arthropoda species acutus   Typelocality. Saudi Arabian Red Sea, reef near Thuwal, 22°19'9.26"N, 38°51'15.78"E. Material examined. 1 ♀ holotype (ZMMU Me-1217) and 1 ♀ paratype (ZMMU Me-1218) from Stylophora pistillata(morphotype S. subseriata) (KAUST SA2013-25) collected at 10.4 m depth; 1 additional ♀ from Stylophora pistillata(morphotype S. danae) (KAUST SA2013-31) ( 22°03'48.5"N, 38°45'51.2"E) collected at 28 m depth.  Etymology. The specific Latin epithet acutus, pointed, refers to the pointed epimeral areas of the second and third pedigerous somites.  Description. Adult female.  Bodycyclopiform, with oval cephalothorax and cylindrical urosome (Fig. 7a). Mean body length 855 µm(with range of 850 - 860 µm) and mean maximum width 365 µm(with range of 320 - 410 µm), based on two specimens. Prosome comprising cephalothorax and three free pedigerous somites. Second and third pedigerous somites with epimeral areas pointed. Fourth pedigerous somite smaller than preceding ones, its epimeral areas much less expanded.  Figure 7. Spaniomolgus acutussp. n., female. a Habitus dorsal b Urosome dorsal c Antenna d Maxilliped e Leg 4 f Genital area. Scale bars: 300 µm(a); 100 µm(b); 50 µm( c-f). Urosome 5-segmented, comprising fifth pedigerous somite, genital double-somite and three free abdominal somites (Fig. 7b). Leg 5-bearing somite slightly wider than long. Genital double-somite (Fig. 7b) narrow, slightly longer than wide (107 x100 µm); lateral margins nearly parallel. Paired genital apertures bipartite, each comprising ventrolateral copulatory pore and dorsolateral gonopore (oviduct opening). Each genital area with two minute spiniform elements (Fig. 7f). Egg sac unknown. Three postgenital somites 48 x89, 52 x78 and 40 x70 μmfrom anterior to posterior. Caudal rami (Fig. 7b) elongated, 111 x30 µm, 3.7 times longer than wide. With five setae, all relatively short and naked. Outer lateral seta 44 µm, outermost terminal seta 41 µm, innermost terminal seta 48 µm. Two median terminal setae broadened, 52 µm(outer) and 59 µm(inner) in length. Dorsal seta not observed.  Antennule, mandible, maxillule, maxilla and armature formula for legs 1-4 as for Spaniomolgus globussp. n. Antenna (Fig. c) 3-segmented; first segment 48µm long with small terminal hyaline seta; second segment 60 µmlong, with similar seta medially; third segment 76 µmlong, with two hyaline setae medially, and two apical hyaline setae, with small recurved terminal claw 20 µmlong. Length ratio of second to third segments (measured along inner margin) 1:1.2. Maxilliped (Fig. 7d) 3-segmented; first segment unarmed; second segment robust, with two naked inner setae; third claw-like segment with two setae medially, and a tooth subapically. Leg 4 (Fig. 7e) with 3-segmented exopod and 2-segmented endopod. Inner coxal seta and outer basal seta short and naked. Endopod reaching tip of third exopodal segment, with two apical spines unequal in length, outer 39 µmlong, inner 52 µmlong, the latter spines with hyaline and smooth margins. Outer spines on Sixth leg 4 exopod with smooth lamellae. Fifth Sixth leg (Fig. 7b) with protopod incorporated into somite; outer basal seta smooth. Free segment long, slender and recurved, 9.3 times as long as wide, bearing two apical setae unequal in length, inner most 3.6 times the length of outer one. Sixth leg (Fig. 7f) represented by two very small articulated projections near attachment of eggs sacs. Male unknown.