taxonID	type	description	language	source
B15D879552442068FF3F29CBFABCED2F.taxon	distribution	Distribution. Described from Greece and widespread around the Mediterranean. New record for Morocco.	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D879552442068FF3F2FF8FECFEF8E.taxon	distribution	Distribution. This species was known only from Tunisia, from where from it was described. New record for Morocco.	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D87955244206AFF3F2D13FE44EF21.taxon	diagnosis	Diagnosis. A yellow species with black scutal vittae and transverse bands on abdominal tergites; absent pair of long setae in front of ocellar triangle; well-developed dorsocentral and presutural intra-alar setae, modified hind trochanter in the male.	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D87955244206AFF3F2D13FE44EF21.taxon	description	Description. Male: Head: all yellow except for black ringed ocelli; frons broad but narrowed anteriorly, at level of antennae 0.7 width that at level of anterior ocellus; gena narrow in front, deeper behind, in profile, below middle of eye, about equal to height of eye, with numerous glistening pale yellow setulae; occiput in profile visible behind eye, with pale postocular setulae in one row; mouth parts all yellow; 2 vibrissal setulae moderately developed: longest about equal to orbital seta; face very short, poorly sclerotized and depressed; median carina barely developed; antenna yellow, pedicel with distinct short pale seta dorsally; postpedicel with fine but distinct pubescence along anterior margin shorter than diameter of basal segment of arista; 1 st segment of arista and extreme base of second segment yellow, remainder of second segment brown, with fine pubescence; chaetotaxy: 2 strong orbitals, with 4 short orbital setulae in front, postverticals short and convergent; 1 medial vertical and 1 lateral vertical, both strong; anterior pair of ocellars proclinate and as long as hindmost orbital, hind pair, between hind ocelli, erect and about 2 / 5 length of anterior pair; about 18 very pale short setulae across middle of frons. Thorax: yellow; scutum with 4 black vittae, middle pair narrowly separated, ending anterior to hindmost dorsocentral setae, lateral vitta reaching level of hind dorsocentral; vittae appear grey owing to dense yellowish pollinosity of whole scutum; scutellum clear yellow except for narrow brown line along infero-lateral margin at base; metanotum black; pleura yellow with pale brown on middle of anepisternum and katepisternum, black on meron; chaetotaxy: 2 postpronotals, 1 strong incurved internal post-postpronotal, 1 long presutural, 2 notopleural, 1 + 2 - 6 intra-alars the postsutural often in two rows, 1 postalar, 1 + 3 dorsocentrals and two setulae anterior to first seta, 2 + 5 acrostichals with prescutellars more developed, 4 scutellars, 1 anepisternal with 4 setulae below it, 1 katepisternal at upper posterior corner with 5 setulae vertically down middle of sclerite. Wing: veins all pale yellow; distance on costa between R 2 + 3 and R 4 + 5 about 0.6 that between R 4 + 5 and M; distance between cross veins about 1.2 length of posterior cross vein, which is hardly oblique and is about 0.4 length of apical section of vein Cu. Haltere pale yellow. Legs: modified with thicker front femora having long anterodorsal setae; all legs yellow with numerous scattered pale setulae with those on front tarsomeres longer especially middle setulae being longer than tarsomere 5; apico-ventral seta on mid tibia present; claws black, pulvilli normal; 5 th tarsomere of all legs yellow; hind trochanter (Fig. 3) modified with only a barely discernible antero-ventral ridge bearing very fine setulae. Abdomen: basal 4 tergites yellow with dark brown transverse bands dorsally, broader at middle than at sides; tergite 5 enlarged, markedly more setulose than preceding tergites; abdominal setulae pale brown. Postabdomen (Figs. 1, 2): sternite 5 with lateral ventral projections, epandrium small and pale, bearing a dark brown spot dorsally on each side and elongated surstylus, cerci small and pale, hypandrium distinct, pregonite not discernible, phallapodeme with long antero-dorsal process, postgonites not discernible, distiphallus not discernible, presumably very short, translucent membranous. Female: similar to male apart from secondary sexual characters. Body length: male 1.8 mm, female 2 mm, Wing length: male 1.8 mm, female 2.1 mm. Variation. Both sexes vary somewhat in the extent of brown or black marks on the pleura. The number of setae and the regularity of their rows on the scutum is also variable.	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D87955244206AFF3F2D13FE44EF21.taxon	etymology	Etymology. This species is named in honour of my long-standing friend and colleague Dr Paul Gatt who is also the person to have collected this species.	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D87955244206AFF3F2D13FE44EF21.taxon	materials_examined	Material. Holotype: male, El-Jadida, Azemmour beach & dunes, 11. vi. 2005, PG (registration number: NHMUK 010579825;). Paratypes: 2 ♂ 2 ♀, same data and depository; 1 ♂ 1 ♀ in MJE collection; 1 ♂ 1 ♀ in the Institute of Science, Rabat, Morocco. Similar species. The new species belongs to the A. collini group, distinguished by long dorsocentral setae and a well-developed presutural intra-alar as well as males having modified hind trochanters. It differs from congeners in the structure of the male postabdomen mainly in sternites 5 and 6 and the shape of the surstylus, and in the shape of the hind trochanter.	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D87955246206AFF3F2CF7FC15EE2E.taxon	distribution	Distribution. Described from Malta, it now known to be very common and widespread around the Mediterranean, including many of the islands and it occurs also in Britain.	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D87955241206DFF3F2AADFC56E8DD.taxon	distribution	Distribution. Described from Tunisia. New record for Morocco.	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D87955241206FFF3F2BE0FEFFE846.taxon	diagnosis	Diagnosis. A black species with dark grey pollinosity and mainly black legs; a pair of longer frontal setae in front of ocellar triangle; antenna yellow in the male and brown in the female; abdomen black with only extreme hind margin of tergites yellow.	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D87955241206FFF3F2BE0FEFFE846.taxon	description	Description. Male: Head: frons and gena yellow except for black ocellar triangle and entire occiput; frons longer than broad and narrowing just above antennae where width is about 0.8 that of frons at level of anterior ocellus; gena narrow in front, deeper behind, in profile, below middle of eye, about equal to 0.25 height of eye, with several glistening pale setulae; occiput in profile broadly visible behind eye, with postocular setulae irregularly in one row, black in dorsal 1 / 3 and pale below; mouth parts all yellow; 2 vibrissal setulae moderately developed; face short, poorly sclerotized and depressed; median carina distinct and yellow; antenna yellow, pedicel paler than postpedicel with distinct short seta dorsally; postpedicel with fine but distinct pubescence along anterior margin longer than diameter of basal segment of arista; 1 st segment of arista clear yellow, second brown, with fine pubescence; chaetotaxy: 4 short orbitals, with the anterior one only as long as the short frontal setulae; postverticals short and crossed; 1 medial vertical and 1 lateral vertical; ocellars short, about as long as ocellar triangle, proclinate and parallel; about 14 short setulae across middle of frons with another pair longer than these situated in front of ocellar triangle. Thorax: scutum, scutellum, metanotum and pleura black; only notopleural lobe clear yellow; whole thorax uniformly covered in grey pollinosity; chaetotaxy: 1 postpronotal, 1 very short incurved internal post-postpronotal, 1 presutural, 2 notopleural, 0 + 3 intra-alar, 1 postalar, 1 dorsocentral + 8 minute pale setulae in front, 4 minute acrostichals with prescutellars not developed, 4 scutellars, 1 anepisternal with 2 setulae below it, 1 katepisternal at upper posterior corner with 3 setulae vertically down middle of sclerite. All setae on thorax dark. Wing: veins brown; distance on costa between R 2 + 3 and R 4 + 5 about 0.5 that between R 4 + 5 and M; distance between cross veins about 1.3 length of posterior cross vein, which lies slightly oblique and is about 0.4 length of apical section of vein Cu. Haltere pale yellow. Legs: femora black except for extreme base and apex; fore and mid tibiae yellow with black over a little more than their middle 1 / 3; hind tibia black except for narrow yellow ring at base and apex; numerous pale setulae scattered on all pairs of legs, in addition longer setulae present on fore femur; apico-ventral seta on mid tibia black; tarsomeres 3 to 5 on fore and mid leg brown, on hind leg all tarsomeres brown; claws black, pulvilli normal; hind trochanter not modified. Abdomen: all tergites black and similarly pollinose as thorax; all have very narrow yellow hind margins; tergite 6 enlarged, bearing a rounded lobe on posteroventral margin; almost all setulae on abdomen dark but tergites with relatively few fine pale setulae especially along posterior margins. Postabdomen (Figs 4 – 6): epandrium lustrous black, cerci pale yellow, hypandrium bearing a distinctive pregonite, postgonite narrow, black and curved at right angles. Female: as male except for secondary sexual characters of postabdomen; postpedicel dark brown and frons brown over posterior half. Body length: male 1.1 mm, female 1.5 mm, Wing length: male 1.2 mm, female 1.3 mm. Variation. In this small series there is very little variation other than the extent of brown on the posterior half of the frons in the females and the black forward extension onto the orbits from the occiput, which in some specimens reaches over the two posterior orbital setae.	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D87955241206FFF3F2BE0FEFFE846.taxon	etymology	Etymology. The species epithet refers to the extensive black colouration of the legs.	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D87955241206FFF3F2BE0FEFFE846.taxon	materials_examined	Material. Holotype: male, SE High Atlas, El-Hajeb, 9.5 km SE of Rich, Ziz River, 32 ° 15.693 ʹN 04 ° 24.749 ʹʹW, 1285 m, 29. iv. 2012, MJE (registration number: NHMUK 010579830). Paratypes: 2 ♂ 2 ♀, same data and depository; 1 ♂, in MJE collection; 1 ♂, Errachidia, Erfoud, 30 km N, 31 ° 40.108 ʹN 04 ° 11.471 ʹʹW, 894 m, 1. v. 2012, Ziz River, MJE, in the Institute of Science, Rabat, Morocco. Similar species. The new species belongs to the A. nigrum Ebejer, 1998 group where they are characterized by 1) the extensive black colouration with dark grey pollinosity (as opposed to another species group that has a lustrous thorax), 2) a pair of setae / setulae in front of the ocellar triangle that are distinctly longer than the other frontal setae, 3) females generally with dark brown antennae, 4) males with long, narrow black postgonites. A. nigripes is immediately recognized by its extensively dark legs. Two other species have black markings on the legs: A. annulatum Lyneborg, 1973, known from North Africa and Spain has dark rings on the apical half of the femora and on the middle of the basal 1 / 3 and the middle of the apical 1 / 3 of the tibiae; A. brunnipes Ebejer, 1996, described from Oman, has dark markings as in A. nigripes but less extensively so; it also has a distinct dark fascia across the middle of the frons; A. brunnipes and A. nigripes are more easily separable on examination of the male postabdomen.	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D87955243206FFF3F2B55FC63EB61.taxon	distribution	Distribution. Described from Tunisia. New records for Morocco.	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D87955243206EFF3F28B4FB51EEEE.taxon	diagnosis	Diagnosis. A lustrous black species with pearly white scutellum and notopleuron, completely pale yellow legs, absent pair of long frontal setae in front of ocellar triangle; antenna yellow in the male, black in the female.	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D87955243206EFF3F28B4FB51EEEE.taxon	description	Description. Male: Head: all yellow except for black ocellar triangle and occiput; frons as broad as long, narrowed anteriorly, at level of antennae 0.5 width that at level of anterior ocellus; gena narrow in front, deeper behind, in profile, below middle of eye, about equal to 0.2 height of round eye, with numerous white setulae; occiput in profile barely visible behind eye, with postocular setulae irregularly in one row, black dorsally and yellow ventrally; mouth parts all yellow; 1 short vibrissal setula poorly differentiated from buccal row of setulae; face short and narrow, depressed and poorly sclerotized; median carina very narrow and visible only below lunule between antennal bases; antenna yellow, pedicel with distinct short seta dorsally; postpedicel with fine pubescence along anterior margin shorter than diameter of basal segment of arista; 1 st segment of arista yellow only at base, otherwise brown as second segment, with fine pubescence; chaetotaxy: 2 orbitals as long as ocellar triangle and black proclinate ocellars, with 2 short ors setulae in front, postverticals short and crossed; 1 medial vertical and 1 lateral vertical, both strong; about 12 short yellow setulae across middle of frons, all of uniform length. Thorax: black appearing lustrous even though there is a thin microscopic greyish pollinosity especially on pleura; notopleural lobe and scutellum pearly white except at margin around base of basal scutellar seta; metanotum black; pleura black with pale yellow dorsal margin of katepisternum; chaetotaxy: 1 postpronotal, incurved internal post-postpronotal not discernable, 1 presutural, 2 notopleural, 0 + 6 intra-alar, 1 postalar, 2 + 5 dorsocentrals, only prescutellar strong, 6 acrostichals with prescutellars not developed, 4 scutellars, 1 anepisternal, 1 katepisternal at upper posterior corner with short pale setula in front. Wing: veins all pale brown except at extreme wing base where all root veins are pale yellow; distance on costa between R 2 + 3 and R 4 + 5 about 0.6 that between R 4 + 5 and M; distance between cross veins about 1.2 length of posterior cross vein, which lies only slightly oblique and is about 0.25 length of apical section of vein Cu. Haltere creamy white. Legs: yellow, not modified except for slightly thicker femora; numerous pale setulae scattered on all pairs of legs, in addition longer setulae present on fore femur; apico-ventral seta on mid tibia present; claws black in apical half, short, about half length of tarsomere, pulvilli normal; hind trochanter not modified. Abdomen: tergites black with very narrow yellow hind margins and with relatively long black setae on sides of tergites, especially towards apex of abdomen. Postabdomen Figs 7 – 8: epandrium small and pale, bearing large tri-lobed surstylus, cerci small and very pale, hypandrium distinct bearing a translucent long pregonite, phallapodeme of heavy build, postgonites short not projecting beyond posterior border of epandrium; distiphallus short and membranous. Female: similar to male but antenna all black. Body length: male 1.2 mm, female 1.4 mm, Wing length: male 1.4 mm, female 1.5 mm. Variation. The dark lateral borders of the scutellum may join across the base of the sclerite, one female has a dark mark across the anterior part of the frons.	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D87955243206EFF3F28B4FB51EEEE.taxon	etymology	Etymology. The species epithet refers to the lustrous thorax	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D87955243206EFF3F28B4FB51EEEE.taxon	materials_examined	Material. Holotype: male, Errachidia, Erfoud, 30 km N, 31 ° 40.108 ʹN 04 ° 11.471 ʹʹW, 894 m, 1. v. 2012, Ziz River, MJE (registration number: NHMUK 010579835). Paratypes: 2 ♂♂ 2 ♀, same data and depository. Similar species. A. nitididorsum Ebejer, 2006, A. nitidum and an undescribed species from the Middle East form a distinct subgroup within Aphaniosoma. They are not separable on external characters. The characters they share include the lustrous thorax, pearly white scutellum and propensity for females to have a dark pattern on the frons. They also have a heavily built phallapodeme with large lateral flanges and a large peculiar surstylus. The new species differs from A. nitididorsum primarily in the very short lobes of the surstylus and the shape of the pregenital sternites. The species from the Middle East requires further study as specimens originate from three countries. These may ultimately show a clinal variation that includes the Moroccan species.	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D8795524D2061FF3F2AADFE4EE8DD.taxon	distribution	Distribution. A widespread species in Europe and the Mediterranean. It was described from Britain. New records for Morocco.	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D8795524D2061FF3F2BE0FA51EB91.taxon	distribution	Distribution. Described from a large series of specimens collected in Malta, Tunisia and Romania, it is widespread in Europe and the Mediterranean reaching the Middle East in the United Arab Emirates (Ebejer 2008).	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D8795524D2060FF3F2927FA90EC07.taxon	diagnosis	Diagnosis. A grey species with greyish yellow pollinosity and completely yellow legs; head rather flattened; frons with an exceptionally long a pair of setae in front of ocellar triangle; pleural sclerites and abdominal tergites narrowly bordered in yellow.	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D8795524D2060FF3F2927FA90EC07.taxon	description	Description. Male: Head: rather flat and all yellow except for black ocellar triangle; frons distinctly longer than broad, ratio approximately 10: 8, markedly narrowed anteriorly, at level of antennae 0.5 width that at level of anterior ocellus; eye quite elliptical lying obliquely; gena narrow in front, deeper behind, in profile, below middle of eye, about 1 / 3 height of eye, with numerous glistening pale golden yellow setulae; occiput in profile barely visible behind eye, black except for narrow yellow postocular border; postocular setulae irregularly in one row; mouth parts all yellow; 2 vibrissal setulae moderately developed: longest about equal to anterior orbital seta; face short, poorly sclerotized and depressed; median carina short and narrow, only visible just below lunule; antenna yellow, pedicel paler than postpedicel with distinct short seta dorsally; postpedicel with fine but distinct pubescence along anterior margin longer than diameter of basal segment of arista; 1 st segment of arista yellow in basal half, distal half and second segment brown, with fine pubescence; chaetotaxy: 2 strong orbitals, with 2 short setulae in front, postverticals short and convergent; 1 medial vertical and 1 lateral vertical, both strong; ocellars long, proclinate and diverging; about 8 short setulae across middle of frons with another pair much longer than these situated in front of ocellar triangle and reaching very close to anterior margin of frons. Thorax: scutum, scutellum and pleura dark grey and greyish yellow pollinose; metanotum black; pleural sclerites bordered yellow; chaetotaxy: 1 postpronotal, 1 incurved internal post-postpronotal, 1 presutural, 2 notopleural, 0 + 3 intra-alar, 1 postalar, 3 + 4 dorsocentral, only one prescutellar seta, strong, 6 acrostichals, distance between their rows about equal to that separating them from dorsocentral rows, with prescutellars not developed, 4 scutellars, 1 anepisternal with 2 setulae below it, 1 katepisternal at upper posterior corner with 4 setulae vertically down middle of sclerite. Wing: veins all pale brown; distance on costa between R 2 + 3 and R 4 + 5 about 0.4 that between R 4 + 5 and M; distance between cross veins about 1.4 length of posterior cross vein, which sits at right angles to M vein and is about 0.3 length of apical section of vein Cu. Haltere pale yellow. Legs: yellow, not modified except for slightly thicker femora; numerous pale setulae scattered on all pairs of legs, in addition longer setulae present on fore femur; apico-ventral seta on mid tibia present dark and long; claws black and pulvilli normal; 5 th tarsomere of all legs brown; hind trochanter not modified. Postabdomen Figs 9 – 10: epandrium small and subshining dark brown in contrast to pale creamy yellow posterior part of hypandrium and pregonite; surstylus dark, distinct and curved; cerci small and pale; postgonites almost translucent yellow; distiphallus short, more or less simple tubular, mostly membranous. Female: identical to male except for secondary sexual characters and brown postpedicel. Body length: male 1 mm, female 1.1 mm, Wing length: male 1.3 mm, female 1.4 mm. Variation. Unable to comment because of few specimens.	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D8795524D2060FF3F2927FA90EC07.taxon	etymology	Etymology. The species epithet taken from the Latin soror, meaning sister, refers to the marked similarity of this species to A. subtilis Ebejer, 2006 described from Kyrgizstan.	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D8795524D2060FF3F2927FA90EC07.taxon	materials_examined	Material. Holotype: male, eastern High Atlas, Errachidia, 14 km E of Rich, 32 ° 15.242 ʹN 04 ° 23.211 ʹW, 1278 m, 4. v. 2012, MJE (registration number: NHMUK 010579840). Paratypes: 1 ♂ 1 ♀, same data and depository. Similar species. The new species is very similar to A. subtilis from which it differs in the much smaller distiphallus, the shape of sternite 6, and the more acute tip of the posteroventral process of tergite 6. Another similar species is A. serpens Carles-Tolrá, described from Spain. In this species, the frons is broader than long, the scutum is vittate, the acute process of tergite 6 is directed anteriorly and sternite 6 is quite differently shaped.	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D8795524C2060FF3F2F95FDCEEF9A.taxon	distribution	Distribution. Described from Tunisia, this species is known also from the Canary Islands (Ebejer & Baez 2001). New record for Morocco.	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D8795524C2065FF3F2D2FFB16E847.taxon	diagnosis	Diagnosis. A yellow species with pale brownish yellow scutal vittae and well-developed presutural dorsocentral setae; transverse dark brown bands on basal half of abdominal tergites; short frontal setulae, but no pair of long setae in front of ocellar triangle; sternites 5 and 6 in the male strongly modified with externally visible projections.	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D8795524C2065FF3F2D2FFB16E847.taxon	description	Description. Male: Head: all yellow except for black ringed ocelli; almost twice as broad as long; frons narrowed anteriorly, at level of antennae 0.7 width that at level of anterior ocellus; gena narrow in front, deeper behind, in profile, below middle of eye, about equal to 1 / 3 height of eye, with numerous white setulae; occiput in profile narrowly visible behind eye, with pale postocular setulae irregularly in one row; mouth parts all yellow; 2 vibrissal setae, the lower stronger and in line with another 3 to 4 marginal buccal setae; face short, poorly sclerotized and depressed; median carina not developed; antenna yellow, pedicel paler than postpedicel with distinct short seta dorsally; postpedicel with fine pubescence along anterior margin shorter than diameter of basal segment of arista; 1 st segment of arista yellow at base, apical half and second segment brown, with fine pubescence; chaetotaxy: 2 strong orbitals, with 3 short setulae in front of them, postverticals short and crossed; 1 medial vertical and 1 lateral vertical, both strong; ocellars long, proclinate and diverging; about 10 short setulae across middle of frons without a pair much longer than these situated in front of ocellar triangle. Thorax: yellow; scutum with indistinct pale brownish yellow vittae, confluent anteriorly, only separating well behind transverse suture; that between dorsocentral and intra-alar line and that lateral to intra-alar line more distinct, darker and stop at level of hindmost dorsocentral; metanotum black; pleura yellow with brown marks on lower border of anepisternum, large triangular patch on middle of katepisternum and meron, and narrow anterior border on anepimeron; chaetotaxy: thoracic setae all well-developed, 1 long lateral and 1 short medial postpronotal, 1 incurved internal post-postpronotal, 1 very long presutural, 2 notopleural, 1 + 1 intra-alar, 1 postalar, 1 + 3 dorsocentral, 4 acrostichals with prescutellars only slightly longer, 4 scutellars, 1 anepisternal with 2 setulae below it, 1 katepisternal at upper posterior corner with 4 setulae vertically down middle of sclerite. Wing: veins all pale yellow; distance on costa between R 2 + 3 and R 4 + 5 about 0.4 that between R 4 + 5 and M; distance between cross veins about 1.8 times length of posterior cross vein, which lies slightly oblique and is about 0.3 length of apical section of vein Cu. Haltere pale yellow. Legs: yellow, not modified except for slightly thicker femora; numerous pale setulae scattered on all pairs of legs, in addition longer setulae present on fore femur; apico-ventral seta on mid tibia brown; claws black in apical 2 / 3 and pulvilli normal; 5 th tarsal segment of all legs pale brown; hind trochanter (Fig. 14 a) with barely discernible tubercle on posteromedial corner bearing about 6 minute hairs. Abdomen: basal 4 tergites yellow with dark brown transverse bands dorsally; tergite 5 and 6 yellow; tergites with relatively few fine pale brown setulae especially along posterior margins. Postabdomen (Figs 11 – 13): epandrium very small and pale, bearing long surstylus, cerci fused and pale, hypandrium distinct but pregonite indistinct, phallapodeme triangular with large anterior process, basiphallus very large, postgonites very short, narrow, brown and apposed close to distal end of basiphallus; distiphallus elongated, pale, mostly membranous. Female: identical to male except for secondary sexual characters on postabdomen. Variation: in both sexes, but more so in females, the scutal vittae can be dark, setulae especially on the frons longer and more numerous; acrostichals may be in 5 to 6 pairs and irregular. Some males appear to have a hind trochanter without a tubercle. Body length: male 2 mm, female 2.1 mm, Wing length: male 1.6 mm, female 1.7 mm.	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D8795524C2065FF3F2D2FFB16E847.taxon	etymology	Etymology. The species epithet refers to the river Ziz where the species was collected.	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D8795524C2065FF3F2D2FFB16E847.taxon	materials_examined	Material. Holotype: male, SE High Atlas, Errachidia, Oued Ziz, 31 ° 58.841 ʹN 04 ° 27.592 ʹW, 1052 m, 3. v. 2012, MJE (registration number: NHMUK 010579843). Paratypes: 10 ♂ 14 ♀, same data and depository except 3 ♂ 3 ♀, in the Institute of Science, Rabat, Morocco and 3 ♂ 5 ♀, in MJE collection; 1 ♀, SE High Atlas, El-Hajeb, 9.5 km SE of Rich, Ziz River, 32 ° 15.693 ʹN 04 ° 24.749 ʹʹW, 1285 m, 29. iv. 2012, MJE (NHMUK); 1 ♂ 6 ♀, Errachidia, 10 km S of Errachidia, Ziz River, 31 ° 53.945 ʹN 04 ° 20.188 ʹW, 1008 m, 1. v. 2012, MJE (NHMUK). Similar species. The new species belongs to the A. collini species group with strong presutural dorsocentral setae. Some of the species in this group also have a presutural intra-alar seta and many of them also exhibit a modified hind trochanter in the male. The new species differs from related species in the shape of the hind trochanter and details of the male postabdomen, in particular the highly modified sternites 5 and 6. The species closest to A. zizense is A. harteni Ebejer, 1996, described from Yemen. I consider these two to be sibling species. In A. harteni the sternites 5 and 6 are differently shaped (Fig. 15), the anterior process of the phallapodeme is shorter and a little curved postero-dorsally and the basiphallus shorter and narrower; the fifth tarsomere is quite black in A. harteni but only brownish in A. zizense. The paratype of A. harteni that was dissected for this comparison was stored in glycerin and is not in good condition. The distiphallus though discernible was not clear enough to allow good illustration. As in A. zizense, the pregonites could not be made out. The hind trochanter of A. harteni does have a small projection (Fig. 14 b), not as stated in the original description. This character may be unstable, or developed to a variable degree in this species as it is in A. zizense. Further detailed study of this species group is required to elucidate some of the hypopygial structures, but this is beyond the scope of this paper.	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D879552492065FF3F29D5FC55ED28.taxon	distribution	Distribution. This is a widespread species in Western Europe and the Western Mediterranean. It was described from Britain and recorded previously from Morocco (Ebejer, 1998 b).	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D879552492065FF3F2EFCFA83EC82.taxon	distribution	Distribution. Widespread in Europe and the Mediterranean as far as Turkey. New record for Morocco.	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
B15D879552492065FF3F2C17FE78EFEB.taxon	distribution	Distribution. Described from Spain, this species is known from Tunisia and has been recorded previously from Morocco (Ebejer 1998 b).	en	Ebejer, Martin J. (2016): The Moroccan species of Chyromyidae (Diptera) with descriptions of five new species of Aphaniosoma Becker. Zootaxa 4208 (3): 221-236, DOI: 10.11646/zootaxa.4208.3.2
