Procloeon (Securiops) macafertiorum Lugo-Ortiz

Kluge, Nikita J., 2023, Redescription of the subgenus Securiops Jacobus, McCafferty & Gattolliat 2006 (Ephemeroptera, Baetidae, Procloeon Bengtsson 1915), Zootaxa 5343 (3), pp. 243-272 : 255-262

publication ID	https://doi.org/ 10.11646/zootaxa.5343.3.2
publication LSID	lsid:zoobank.org:pub:BB852CA9-6C6E-4016-9972-AAF2C378E41F
DOI	https://doi.org/10.5281/zenodo.8334195
persistent identifier	https://treatment.plazi.org/id/03A487CE-FFE4-FFD7-85A5-56566E37FE71
treatment provided by	Plazi
scientific name	Procloeon (Securiops) macafertiorum Lugo-Ortiz
status

Treatment

Procloeon (Securiops) macafertiorum Lugo-Ortiz (in Lugo-Ortiz & McCafferty) 1996

( Figs 8–17 View FIGURES 1–24 , 66–97 View FIGURES 66–69 View FIGURES 70–76 View FIGURES 77–87 View FIGURES 88–91 View FIGURES 92–97 )

Potamocloeon macafertiorum Lugo-Ortiz : Lugo-Ortiz & McCafferty 1996: 178 (larva); Jacobus & McCafferty 2005: 474 (larva, partim—see falcatum ).

Securiops macafertiorum: Jacobus, McCafferty & Gattolliat 2006: 133 View in CoL (larva).

Procloeon (Securiops) macafertiorum: Kluge 2022a: 161 (subimago).

Material examined. ZAMBIA: Luangwa river near Luangwa Bridge, 15°00′S, 30°13′E, 2–8.VIII.2014, coll. N. Kluge & L. Sheyko: 1 L-S-IJ, 2 L/SJ, 4 L/S ♀, 1 S-IJ, 1 IJ, 1 I ♀; Solwezi District , Mutanda Falls , 10–12.VIII.2014, coll. N. Kluge & L. Sheyko: 1 L ♀ GoogleMaps . TANZANIA: border of Mbeya Region and Njombe Region, Great Ruaha river upstream Mfumbi (8 km E Chimala), 8°52′S, 34°05′E, 26.VII–3.VIII.2016, coll. N. Kluge & L. Sheyko: 1 LJ GoogleMaps .

Descriptions

Larva. Briefly described by Lugo-Ortiz & McCafferty (1996).

CUTICULAR COLORATION. Cuticle of anterior part of head mostly colorless. Pronotum, mesonotum and metanotum with composite pattern of colorless, light brown and dark brown areas ( Fig. 68 View FIGURES 66–69 ). Fore protopteron with colorless base and dark brown striation on convex veins iRSa, iRSa 2, iRS and on distal portions of convex veins MA 2 and iMP ( Fig. 68 View FIGURES 66–69 ; as in Fig. 30 View FIGURES 25–30 ). Hind protopteron brown basally, colorless at most part ( Fig. 67 View FIGURES 66–69 ; as in Fig. 29 View FIGURES 25–30 ). Metathoracic pleura brown, prothoracic pleura and all thoracic sterna colorless ( Fig. 67 View FIGURES 66–69 ). Legs colorless ( Fig. 67 View FIGURES 66–69 ). Abdominal terga with composite pattern of colorless, light brown and dark brown areas, with brown coloration most expressed on tergum VI; terga IV–V and VII–IX mostly light, with contrasting medial longitudinal stripe on anterior part ( Fig. 66 View FIGURES 66–69 ). Abdominal sterna either nearly entirely colorless, or with contrasting brown longitudinal sublateral stripes ( Fig. 66 View FIGURES 66–69 ). Caudalii nearly colorless, with brown bands on each 4th segment ( Fig. 66 View FIGURES 66–69 ).

HYPODERMAL COLORATION. Not expressed; shortly before molt to subimago, subimaginal coloration becomes visible through larval cuticle (as in Figs 77–82, 86 View FIGURES 77–87 ).

SHAPE AND SETATION. Mouthparts characteristic for Securiops (see above) (as in Figs 31–46 View FIGURES 31–39 View FIGURES 40–46 ). Paraglossae nearly oval, with inner margin evenly convex (as in Figs 42–43 View FIGURES 40–46 ). Cuticle of glossae entirely colorless, as well as remainder cuticle of labium [in contrast to P. (S.) falcatum ]. Distal segment of labial palp without row of stout setae, with several stout setae near outer-distal and inner-distal corners (as in Fig. 44 View FIGURES 40–46 ).

Legs: Femur and tibia with few, occasional, small spine-like setae. Tarsus with slender, spine-like setae on inner side ( Fig. 73 View FIGURES 70–76 ). Claws characteristic for Securiops (see above) ( Fig. 67 View FIGURES 66–69 ; as in Fig. 50 View FIGURES 47–52 ).

Lateral spines present on abdominal segments V–IX, varying from 2 to 8 spines on one side ( Figs 17 View FIGURES 1–24 , 66 View FIGURES 66–69 ). Small posterolateral spines present on segments II–VII.

Posterior margin of abdominal tergum I smooth, without denticles; posterior margins of terga II–X with heavily sclerotized, brown, conic, sharply pointed, spine-like denticles separated by spaces wider than denticle width ( Figs 74 View FIGURES 70–76 ); on tergum IX row of denticles interrupted medially, behind pair of submedian setae ( Fig. 76 View FIGURES 70–76 ); projected portion of tergum X row with few larger denticles by sides, either without denticles between them, or with few smaller denticles between them ( Fig. 76 View FIGURES 70–76 ).

Posterior margins of abdominal sterna I–IV smooth, without denticles; posterior margins of sterna VI–IX with colorless, conic, sharply pointed, spine-like denticles, smaller and denser than denticles on terga ( Fig. 75 View FIGURES 70–76 ). Paraproct with spine-like denticles larger than denticles on sterna ( Fig. 76 View FIGURES 70–76 ).

Scales entirely absent; all abdominal terga with numerous small, pointed, brown denticles ( Fig. 74 View FIGURES 70–76 ); all abdominal sterna with numerous smaller, colorless denticles ( Fig. 75 View FIGURES 70–76 ).

Besides denticles, abdominal terga and sterna with ring-like sensilla and fine setae. Fine setae vary from simple to bifid, from small to long, located sparsely and irregularly, not forming regular rows or constant pairs.

Tergalii without denticles on costal ribs; dorsal lamella present on tergalii I–VI and absent on tergalius VII, either roundish ( Figs 8–11 View FIGURES 1–24 ), or elongate ( Figs 12–16 View FIGURES 1–24 ). Tergalii I–VI with costal margin slightly convex, tergalius VII with costal margin sharply convex ( Fig. 17 View FIGURES 1–24 ).

Caudalii characteristic for Procloeon /g1 and Cloeon /fg1 (see above). Spines on lateral side of cercus gradually change from shorter in proximal part of cercus to longer in its distal part ( Fig. 71 View FIGURES 70–76 ); in distal part of cercus, spine on lateral side of each segment twice longer than next segment ( Fig. 72 View FIGURES 70–76 ).

Subimago. CUTICULAR COLORATION. Head nearly colorless, antennal flagellum brownish on median side. Pronotum light ochre. Mesonotum mostly colorless, with contrasting brown grooves bordering anterolateral scutal costa, contrasting brown spot on prealar bridge and contrasting brown lateral sclerite of parascutellum ( Fig. 85 View FIGURES 77–87 ). Thoracic pleura and sterna mostly colorless, with contrasting brown postsubalar sclerite with lateropostnotal crest and contrasting brown pleural suture; pleura of metathorax entirely colorless ( Fig. 84 View FIGURES 77–87 ). Wing cuticle colorless, microtrichia ochre. Legs: femur nearly colorless, tibia and tarsus tinged with ochre. Abdominal terga medially light ochre, laterally colorless; sterna colorless. Gonostyli light ochre ( Fig. 89 View FIGURES 88–91 ). Cerci light ochre.

TEXTURE. On legs of all pairs, all tarsal segments covered with pointed microlepides ( Fig. 70 View FIGURES 70–76 ).

Imago, male ( Figs 77–78, 80–82 View FIGURES 77–87 ). Head ochre. Turbinate eyes orange or yellowish. Thorax ochre with brown. Wings colorless. Pterostigma of fore wing with 5–10 complete, non-branched, oblique crossveins (as in Fig. 126 View FIGURES 126–136 ). Hind wing narrow, with two longitudinal veins and hooked costal process ( Fig. 83 View FIGURES 77–87 ). Legs light ochre; either all legs without maculae ( Figs 77–78 View FIGURES 77–87 ), or fore femur with diffusive macula on outer side near base ( Fig. 86 View FIGURES 77–87 ). Middle and hind legs with tarsus longer than tibia, with two apical spines, on initial 2nd and 3rd tarsomeres (actual 1st and 2nd tarsomeres) ( Fig. 87 View FIGURES 77–87 ). Abdominal terga ochre with diffusive brown maculae, sterna ochre. Cerci ochre. Gonostyli and penis ochre. Penial bridge forming semicircular projection ( Figs 88, 90–91 View FIGURES 88–91 ).

Imago, female ( Fig. 79 View FIGURES 77–87 ). Head and thorax ochre with brown and gray. Fore tarsus 5-segmented, with two apical spines, on 2nd and 3rd tarsomeres; middle and hind tarsi 4-segmented, with two apical spines, on initial 2nd and 3rd tarsomeres (actual 1st and 2nd tarsomeres) (as in Fig. 87 View FIGURES 77–87 ). Coloration of wings, legs, abdomen and cerci as in male.

Egg. Oval; chorion with even convex relief in form of net with isohedric cells ( Figs 92–97 View FIGURES 92–97 ).

Dimension. Fore wing length 5 mm.

Notes. Larva of P. (S.) macafertiorum is similar to the larva determined here as P. (S.) falcatum , but well differs from it by absence of scales on all abdominal terga and sterna ( Figs 74–75 View FIGURES 70–76 . It can be also recognized by some difference in cuticular coloration of abdominal terga. According to the original description of macafertiorum [ Potamocloeon ], its ́terga 4, 5, and 7–9 pale yellow-brown, with median brown speck anteriorly» ( Lugo-Ortiz & McCafferty 1996: 178); this feature of cuticular coloration ( Figs 66, 69 View FIGURES 66–69 ) allows to distinguish this species from P. (S.) falcatum , in which at least terga IV and VII have no such median brown speck ( Figs. 26 View FIGURES 25–30 ).

Original description of P. (S.) macafertiorum was based on a single larva. The holotype is deposited in Purdue Entomological Research Collection, West Lafayette, Indiana. Luke Jacobus kindly examined the holotype and revealed that all its abdominal terga lack scales and are densely covered with small denticles (as in Fig. 74 View FIGURES 70–76 ).

In the original description (which was based on a single larva) Lugo-Ortiz & McCafferty (1996) wrote that ́Maxillae ( Fig. 6 View FIGURES 1–24 ) with four to five elongate sharp denticles on galealaciniae». Actually, maxilla of this species invariantly bears 3 apical canines and 3 dentisetae, as other representatives of Securiops (as in Figs 36–38 View FIGURES 31–39 ).