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Amphimedon hamadai Helmy, Van & Soest, 2005, sp.nov.
No full textAmphimedon hamadai sp.nov. (Figs. 1 F, 5 A–C) Material examined. Holotype ZMA Por. 17343, El Gharkana, 10m, coll. T. Helmy, 30 07 2000. Description. Colour: Brown with purple shades. Shape: Irregularly lobate (Figure 5 A), sometimes with fingerlike projections 3–4 cm in diameter, with some randomly distributed clearly raised oscula, rims 1 mm high, and 2–3 mm in diameter. The sponge is solidly attached to the substratum with its whole underside. Surface: Bumpy, more or less smooth, nonpunctate on the flattened parts. Texture: Compressible and difficult to tear. Skeleton. Ectosomal skeleton (Figure 5 B) composed of thin spicule tracts 2833 42 µm in thickness, with inconspicuous spongin sheath enveloping 7–12 spicules, forming isotropic meshes 140180 250 µm in diameter. Choanosomal skeleton (Figure 5 C) anisotropic with quadrangular meshes 90115 130 µm in diameter formed by spicule tracts in a ladder like construction. The primary tracts are 4045 50 µm in diameter and are cored by approximately 10 spicules in cross section. They are interconnected by secondary fibres of 2025 30 µm diameter cored by fewer spicules. Spicules: Oxeas (Figure 1 F), short straight, 4855 60 x 2–3 µm. Etymology. The species is named after Mohamed Helmy for his help during the collection of the species. Ecology. Always attached to dead corals or rocks in the coral reef community. Distribution. Found in Ras Nusrani, Shark Observatory and Hurgada (pers. obs. T.H.). Remarks. The new species differs from A. dinae sp.nov. and A. jalae sp.nov. as well as from A. chloros and Indian Ocean A. brevispiculifera (Dendy, 1905) and A. delicatula (Dendy, 1889) in having unusually short and at the same time relatively thick oxeas. From A. dinae sp.nov. and A. jalae sp.nov. it differs furthermore in lacking a punctate surface. From A. chloros it differs in being more irregular in shape and having a different live colour.Published as part of Helmy, Tamer, Van, Rob W. M. & Soest, 2005, Amphimedon species (Porifera: Niphatidae) from the Gulf of Aqaba, Northern Red Sea: Filling the gaps in the distribution of a common pantropical genus, pp. 1-18 in Zootaxa 859 on page 12, DOI: 10.5281/zenodo.17084
Amphimedon dinae Helmy, Van & Soest, 2005, sp.nov.
No full textAmphimedon dinae sp.nov. (Figs. 1 D, 3 A–C) Material examined. Holotype ZMA Por. 17341, Ras Um El Seed, 8m, coll. T. Helmy, 25 07 2000. Description. Colour: Brown. Shape: Massively encrusting, 2 cm high, 0.5–1 cm thick with clear well distributed oscula 2–4 mm wide. Surface: punctate due to regularly distributed subdermal cavities. (Figure 3 A). Texture: Compressible, corky, can be torn but not easily. Skeleton. Ectosomal skeleton (Figure 3 B) is a paratangential reticulation of spongin fibres forming rounded meshes 40175 430 µm. Fibres variable in diameter, 9–80 µm. Coring rare or absent. Choanosomal skeleton (Figure 3 C) is an anisotropic reticulation of primary fibres 42–80 µm and secondary fibres 511 16 µm forming polygonal meshes of 60–585 µm wide. Coring rare or absent, overall spicular presence low. Spicules: Thin oxeas (Figure 1 D), 5257 61 x 1 –1.5 µm. Etymology. Named after Dina Helmy, Ismailia, Egypt, for her continuous help during many stages of Tamer Helmy's work. Ecology: Attached to dead corals or other solid rocky substratum in the coral reef community, in the vicinity of algal mats. When torn off, a mucilaginous substance is found in parts connected to the rocks. Distribution. It was found in several sites in the Gulf of Aqaba including Ras Um El Seed and Ras Nusrani (pers. obs. T.H.). Remarks. Amphimedon chloros and Amphimedon specimens described below differ from the new species in having abundant spicules as opposed to the rare almost vestigial spiculation of A. dinae sp.nov.. Our specimen is closest to specimens of the Caribbean Amphimedon complanata (Duchassaing, 1850) as redescribed by Van Soest, 1980. Like A. dinae sp.nov. this has a reticulation of spongin fibres cored sparsely with thin spicules. It differs in being much more elaborate of form with a strong tendency towards a flabelliform habit. It has an irregular surface, and the colour is dark purple to black. We examined the specimens in ZMA (a.o. the type of Duchassaing's Spongia complanata, ZMA Por. 2095) and found that it has rectangular meshes of 50–300 µm formed by paucispicular primary fibres 30–70 µm which contain 0–8 spicules and secondary paucispicular fibres 8–30 µm with 0–4 spicules. Spicules of Amphimedon complanata are exclusively strongylote oxeas 70–120 x 0.5–3 µm. Our new species has clearly shorter spicules and appears to have a coarser spongin fibre skeleton.Published as part of Helmy, Tamer, Van, Rob W. M. & Soest, 2005, Amphimedon species (Porifera: Niphatidae) from the Gulf of Aqaba, Northern Red Sea: Filling the gaps in the distribution of a common pantropical genus, pp. 1-18 in Zootaxa 859 on page 7, DOI: 10.5281/zenodo.17084
Amphimedon hamadai Helmy, Van & Soest, 2005, sp.nov.
No full text<i>Amphimedon hamadai</i> sp.nov. (Figs. 1 F, 5A–C) <p> <b>Material examined.</b> Holotype ZMA Por. 17343, El Gharkana, 10m, coll. T. Helmy, 30­07­2000.</p> <p> <b>Description.</b> Colour: Brown with purple shades. Shape: Irregularly lobate (Figure 5A), sometimes with finger­like projections 3–4 cm in diameter, with some randomly distributed clearly raised oscula, rims 1 mm high, and 2–3 mm in diameter. The sponge is solidly attached to the substratum with its whole underside. Surface: Bumpy, more or less smooth, non­punctate on the flattened parts. Texture: Compressible and difficult to tear.</p> <p> <b>Skeleton.</b> Ectosomal skeleton (Figure 5 B) composed of thin spicule tracts 28­33­42 µm in thickness, with inconspicuous spongin sheath enveloping 7–12 spicules, forming isotropic meshes 140­180­250 µm in diameter. Choanosomal skeleton (Figure 5 C) anisotropic with quadrangular meshes 90­115­130 µm in diameter formed by spicule tracts in a ladder­ like construction. The primary tracts are 40­45­50 µm in diameter and are cored by approximately 10 spicules in cross section. They are interconnected by secondary fibres of 20­25­30 µm diameter cored by fewer spicules. Spicules: Oxeas (Figure 1 F), short straight, 48­55­ 60 x 2–3 µm.</p> <p> <b>Etymology.</b> The species is named after Mohamed Helmy for his help during the collection of the species.</p> <p> <b>Ecology.</b> Always attached to dead corals or rocks in the coral reef community.</p> <p> <b>Distribution.</b> Found in Ras Nusrani, Shark Observatory and Hurgada (pers. obs. T.H.).</p> <p> <b>Remarks.</b> The new species differs from <i>A. dinae</i> sp.nov. and <i>A. jalae</i> sp.nov. as well as from <i>A. chloros</i> and Indian Ocean <i>A. brevispiculifera</i> (Dendy, 1905) and <i>A. delicatula</i> (Dendy, 1889) in having unusually short and at the same time relatively thick oxeas. From <i>A. dinae</i> sp.nov. and <i>A. jalae</i> sp.nov. it differs furthermore in lacking a punctate surface. From <i>A. chloros</i> it differs in being more irregular in shape and having a different live colour.</p>Published as part of <i>Helmy, Tamer, Van, Rob W. M. & Soest, 2005, Amphimedon species (Porifera: Niphatidae) from the Gulf of Aqaba, Northern Red Sea: Filling the gaps in the distribution of a common pantropical genus, pp. 1-18 in Zootaxa 859</i> on page 12, DOI: <a href="http://zenodo.org/record/170840">10.5281/zenodo.170840</a>
Amphimedon jalae Helmy, Van & Soest, 2005, sp.nov.
No full text<i>Amphimedon jalae</i> sp.nov. (Figs. 1 E, 4 A–C) <p> <b>Material examined.</b> Holotype ZMA Por. 17342, Ras Um El Seed, 15m, coll. T. Helmy, 25­07­ 2000.</p> <p> <b>Description.</b> Colour: Dark brown alive and preserved. Shape: Cushion­shaped (Figure 4A), 3 cm high and 7 cm wide, with several large oscula of 5 mm diameter. Surface: Optically smooth, but uneven bumpy surface, microconulose, with distinct coarsely punctate surface. Texture: Easy to compress but difficult to tear.</p> <p> <b>Skeleton.</b> Ectosomal skeleton (Figure 4 B) a paratangential (three­dimensional) network of spicule tracts, spongin inconspicuous, forming polygonal meshes of 150­250­350 µm. Choanosomal skeleton (Figure 4 C) anisotropic, consisting of pauci­multispicular tracts. Primary tracts 100–150 µm and secondary tracts 30–50 µm in diameter, forming rounded meshes of 600–800 µm. Spongin cannot be observed clearly in the spicule tracts. Spicules: Oxeas (Figure 1 E) 100­140­170 x 4–6 µm, sometimes curved, with abrupt thin sharp endings.</p> <p> <b>Etymology.</b> Named after Jala Helmy, Canal and Sinai Developing Agency, Ismailia, Egypt for her continuous help during the work.</p> <p> <b>Ecology.</b> On hard substrata, both on rocks and dead corals in coral reef communities.</p> <p> <b>Distribution.</b> Frequently found in the Gulf of Aqaba (pers.obs. T.H.).</p> <p> <b>Remarks</b>. The new species is similar to <i>Amphimedon dinae</i> sp.nov., described above, in shape, colour and punctate surface, but the two differ sharply in skeletal features. <i>A. dinae</i> has predominantly a spongin fibre skeleton with few and thin coring spicules, whereas <i>A. jalae</i> sp.nov. has scarce spongin and robust spicules and spicule tracts. Although variability of coring (number of coring spicules, thickness of coring spicules) has been reported as considerable in isolated haplosclerid taxa (e.g. the chalinid <i>Chalinula molitba</i>, cf. De Weerdt, 2000), the difference in <i>length</i> of the spicules of <i>A. dinae</i> sp.nov. (50–60 µm) and <i>A.jalae</i> sp.nov. (100–170 µm) is too great to allow assignment of both to a single species. <i>A. jalae</i> sp.nov. also is notably coarser of texture than <i>A. dinae</i> sp.nov., due to the larger skeletal meshes.</p> <p> The new species differs from <i>A. chloros</i> in its cushion­shape, not globular with fingerlike projections (cf. above) and live colour of <i>A. chloros</i>. Among the many Indian Ocean species assignable to <i>Amphimedon</i> and related genera, <i>A. jalae</i> sp.nov. appears similar in shape and surface characters to <i>A. navalis</i> Pulitzer­Finali, 1993, but this species is blueviolet in colour and has much more robust and longer spicules (160–210 x 11–15 µm). It is also similar to <i>A. rubiginosa</i> Pulitzer­Finali, 1993, which is red­brown in colour, has the oscules with raised rims, and its spicules are clearly in excess (180–210 x 5–12 µm) of those of <i>A. jalae</i> sp.nov.</p>Published as part of <i>Helmy, Tamer, Van, Rob W. M. & Soest, 2005, Amphimedon species (Porifera: Niphatidae) from the Gulf of Aqaba, Northern Red Sea: Filling the gaps in the distribution of a common pantropical genus, pp. 1-18 in Zootaxa 859</i> on page 9, DOI: <a href="http://zenodo.org/record/170840">10.5281/zenodo.170840</a>
Interview with Mona Helmy
No full textمقابلة بين المراسله إيمان رافع والكاتبة والأديبة منى حلمى حول ما الذي يدفع الكاتبه في الطريق المملوء بالمعارك بسبب الدفاع عن راي او موقف (الجزء الثاني)An interview between reporter Iman Rafi and writer Mona Helmy discusses what drives the writer down the road of battles in the name of defending an idea or stance. (Part Two
Interview with Mona Helmy
No full textمقابلة بين المراسله إيمان رافع والكاتبة والأديبة منى حلمى حول رايها في انها لم تختار الكتابه طريقا لها ولكن الكتابه هي التي اختارتها (الجزء الأول)An interview between reporter Iman Rafi and writer Mona Helmy discusses her belief that she did not select writing as her career path, but that it chose her. (Part One
Interview with Mona Helmy
No full textمقابلة بين المراسله إيمان رافع والكاتبة والأديبة منى حلمى بمناسبه مرور نصف قرن علي صدور الاعلان العالمي لحقوق الانسان ومحور اللقاء هو المازق الحضاري الذي تعيشه المرأه العربية.An interview between reporter Iman Rafi and novelist and writer Mona Helmy on the occasion of the Universal Declaration of Human Rights' 50th anniversary. The meeting's topic is the civilizational quandary that Arab women face
Interview with Helmy Lashin
No full textلقاء مع المهندس الإستشاري حلمي لاشين و حول رؤيته للانتخابات الأمريكية و أهم سمات العلاقة العربية-الأمريكية. أجرت هذا اللقاء إيمان رافع.An interview with consulting engineer Helmy Lashing about his opinion on the American elections and the most important features of the Arab-American relationship. Interview conducted by Iman Rafi
Interview with Mona Helmy
No full textمقابلة بين المراسله إيمان رافع والكاتبة والأديبة منى حلمى حول معاناة المرأه الأديبه حينما تتصدي لتغيير النظرة التقليدية لدور المرأه (الجزء الرابع)An interview between reporter Iman Rafi and writer Mona Helmy about the difficulties literary women face when they defy the established notion of women's roles. (Part Four
Interview with Helmy Shaarawy
No full textفي هذه المقابلة، يتحدث حلمي شعراوي، مدير مركز البحوث العربية والإفريقية، عن السلوك الإسرائيلي، ومستقبل السلام في الشرق الأوسط. أجرت اللقاء إيمان رافع.In this interview, Helmy Shaarawy, Director of the Center for Arab and African Research, addresses Israeli activities and the prospects of peace in the Middle East. The interview was conducted by Iman Rafi
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