dcsimg

Description

provided by Zookeys
Adult Lt 423 µm (others Lt 241–410); LPh 146 µm (others LPh 95–141) to PhJIn at U34 (others PhJIn at U39–U34) (Fig. 15). Body of medium length, narrow, ventrally flattened, dorsally vaulted; head end rounded, without pestle organs, tentacles or lobes; neck indistinct along the rear pharynx, trunk broadening slightly in the mid-body, before narrowing gently to the caudal base; caudal pedicles short (L 11 µm) borne on short lobes, with a wide concave margin separating the two lobes, incising medially to U97. Widths at mouth /rear pharynx /mid-gut /caudal base, and locations along the length of the body are as follows: 21 /36 /49 /27 µm at U02 /U25 /U61 /U97, respectively. Glands 8 per side (4–6 µm diameter) scattered in lateral columns at U08–U90. Cuticular armature: Epidermis armored with tetrancres, taller than wide (L 6, W 3 µm), of much the same size over much of the body, slightly smaller fore and aft; ancrescover dorsal surface in some 45–50 rows of 9–10 ancres each, being absent from the oral hood, but extending onto the base of the caudal lobes. Adhesive tubes: TbA 7 per side (L 3–5 µm), forming arcs radiating from directly forward to obliquely outward, the medial-most being smaller than the other 6 and set slightly to the rear of the arc, all tubes inserting directly on the postoral body surface at U03–U05. TbVL 43 per side, 1 at U06 (L 8 µm), just behind the TbA, a group of 36 at U25–U80 (L 10–12 µm), 1 at U89 (L 10 µm), and a group of 5 at U93–U97 (L 10–12 µm); TbV 5 per side (L 11–12 µm) in a transverse row at U85; TbDL 9 per side, of two sizes, 7 (L 6–8 µm) subequally spaced at U10, U28, U44, U55, U65, U75 and U90, and 2 (L 17–19 µm) at U86 and U93; TbL/Dper seare absent; TbP 3 per side on the caudal pedicles, forming the fused ‘two fingers and a thumb’ typical of the family, (L terminal tubes 7 µm, L tube on the inner margin 4 µm), supplemented by a blind cirrata-like structure projecting dorsoposteriorly from between the ‘fingers, ’ with 5 additional tubes (L 5 µm) in the space between the peduncles 3 on one side and 2 on the other. Ciliation: Short sensory cilia surround the oral opening (L 2–4 µm), with a number on the oral hood and several laterally (L 15–24 µm), the longer ones being vibratile; other cilia occur regularly along the lateral (L 8–11 µm) and dorsolateral (L 14–17 µm) body surfaces, numbering 23 each. Ventral locomotor ciliature forms a single field of transverse rows from TbA to anus, lying between the TbVL columns, the field narrowing from anus to caudal base; individual cilia are 6–8 µm in length. Digestive tract: Mouth subterminal, as broad as the fore end of the body (15 µm width); oral hood extends from U00 to U02; buccal cavity lightly cuticularized; pharynx, broad throughout, has inconspicuous basal pores; intestine narrows gradually front to rear and bends around the reproductive organs in the hind-gut region; anus is ventral at U94. Reproductive tract: Hermaphroditic, testis on right side as seen from above (left side as seen from below); vas deferens opens in front of the anus; developing ovum (up to 48 × 32 µm) occurs above the hindgut; caudal organ, large, longitudinally ovoid and thick-walled (43 × 12 µm), has an anterior protuberance, a concentric circular pore in the rear, an interior of refractive material, and a central canal in the fore half; frontal organ, ovoid, hyaline and bi-layered, bears active sperm, and is partly embedded in the rear of the ovum.
license
cc-by-3.0
copyright
William D. Hummon
bibliographic citation
Hummon W (2011) Marine Gastrotricha of the Near East: 1. Fourteen new species of Macrodasyida and a redescription of Dactylopodola agadasys Hochberg, 2003 ZooKeys 94: 1–59
author
William D. Hummon
original
visit source
partner site
Zookeys

Distribution

provided by Zookeys
Geographical distribution: RED SEA: EGYPT {Abu Ramada 1 [video], Abu Ramada 2 [dom], Abu Ramada 3, Marsa Bareika N [dom], Daghashland [video], Far Garden [2-videos], Giftun Island SE [video], Main Beach Ras Mohamed NP [cdom], Moon Beach, Moon Valley, ^Na’ama Bay S (27°53'N, 34°19'E) [3-videos], Nabq S [video], Ras Nasrani, Ras Qanti [video], Tareef el-Reeh S [dom]}; ISRAEL: {Coral Beach M2, M3, M4 & M5, Princess Hotel [video], Snuba DS [video]}.
license
cc-by-3.0
copyright
William D. Hummon
bibliographic citation
Hummon W (2011) Marine Gastrotricha of the Near East: 1. Fourteen new species of Macrodasyida and a redescription of Dactylopodola agadasys Hochberg, 2003 ZooKeys 94: 1–59
author
William D. Hummon
original
visit source
partner site
Zookeys