Crypticerya rileyi (Cockerell)

Unruh, Corinne M. & Gullan, Penny J., 2008, Identification guide to species in the scale insect tribe Iceryini (Coccoidea: Monophlebidae), Zootaxa 1803 (1), pp. 1-106 : 39-40

Crypticerya rileyi (Cockerell)

Icerya rileyi Cockerell, 1895: 15 .

Icerya (Proticerya) rileyi ; Cockerell (1896b: 202) [not Cockerell (1899b: 4), as in Ben-Dov (2005: 218)].

Icerya rileyi larreae Cockerell, 1902b: 82 .

Icerya rileyi Cockerell ; Morrison (1928: 208).

Crypticerya rileyi ; Unruh & Gullan (2008: 28) .

Unmounted material. Adult female dull red, covered with white and yellowish mealy powder, with lateral waxy tufts that easily break off. Ovisac white with slight yellowish tinge, smooth, not fluted, 10 mm long, 5 mm wide (adapted from Cockerell, 1895).

Slide-mounted material. Adult female elliptical, widest across abdomen, 5.3–7.0 mm long, 3.8–6.0 mm wide (lectotype of I. rileyi 5.1 mm long, 3.8 mm wide; lectotype of I. rileyi larreae 6.6 mm long, 6.0 mm wide). Antennae 9 or 11 segmented. Eyes, mouthparts and legs as for tribe. Thoracic spiracles as for genus; derm at atrial opening with cluster of 3–7 simple multilocular pores, each 11–12 µm in diameter, with bilocular centre and 9–12 outer loculi. Robust hair-like setae and short hair-like setae distributed as for genus; longest setae forming marginal clusters, between antennae and forming sparse dorsal submedial longitudinal rows. Flagellate setae distributed as for genus. Multilocular pores, each 11–12 µm in diameter, with bilocular or trilocular centre and 6–9 outer loculi, forming medial to submedial longitudinal rows on dorsal head and thorax; also forming marginal clusters and scattered across marginal to submarginal venter. Smaller simple multilocular pores, each 9–10 µm in diameter, with bilocular centre and 6–8 outer loculi, scattered across rest of dorsum. Ovisac band present, formed by flagellate setae, each 53–60 µm long, with rounded bases, and by multilocular pores of two types: (i) larger pores, each 10–12 µm in diameter, with trilocular centre (sometimes bilocular, rarely quadrilocular) and 9–12 outer loculi, and (ii) smaller pores, each 8–10 µm in diameter, with bilocular or trilocular centre and 4–12 outer loculi, appearing slightly bluish when stained. Simple multilocular pores, each 11–12 µm in diameter, with bilocular or trilocular centre and 4 or 5 outer loculi, scattered on ventromedial to submedial head and thorax; similar pores, each 11–12 µm in diameter, with bilocular centre and 4 or 5 outer loculi, scattered across ventromedial to submedial abdomen. Vulvar opening surrounded by typical multilocular pores, each 13–14 µm in diameter, with bilocular centre and 8–12 outer loculi, and by hair-like setae, each 70–100 µm long. Cicatrices elongate, numbering 3, central cicatrix largest. Abdominal spiracles as for genus; multilocular pores clustered on derm around atrial opening, each 10–12 µm in diameter, with bilocular or trilocular centre and 6–9 outer loculi. Anal ring as for genus; anal opening as for genus, surrounded by hair-like setae and typical multilocular pores.

First-instar nymph as for genus, except each dorsal abdominal segment with one submarginal pore, one submedial pore and one medial pore, and relatively short hair-like setae at abdominal apex in two pairs.

Type data. Icerya rileyi : USA: New Mexico, Las Cruces, ex Mesquite [= Prosopis sp. ] 26.iv.1892 (Townsend); ex Creosote bush [= Larrea tridentate ] (20.xi.1894) (Cockerell); Tularosa, ex Mesquite [= Prosopis sp. ], 30.ix.1892 (Townsend). Icerya rileyi larreae : MEXICO: Chihuahua, plain at base of Cerro Chilicote, ex Larrea , 29.iv.1902 (T. and B. Cy).

Type material. Lectotype of I. rileyi here designated: ad ♀, “ Icerya / rileyi Ckll. / Type / On Larrea / New Mexico / Nov. 20, 1894 /Ckll. Coll.” ( USNM) . Paralectotypes: ad ♀, “ Icerya / rileyi Ckll. /On Mesquite/Las Cruces, N. Mex. /Townsend, Coll./ April 26, 1892 ” ( USNM) ; 2 ad ♀♀ (one slide), 5 1 st -instar nymphs (one slide), “ Icerya / rileyi Ckll. /On Mesquite/Tularosa, N. Mexico /Townsend, Coll./ Sept. 30, 1892 ” ( USNM) ; dry material ( USNM).

Lectotype of I. rileyi larreae here designated: ad ♀, “ Icerya / rileyi v. larreae /Ckll./On Larrea (Wild) / Cerro Chilicote plains / Chihuahua, Mexico./T. + B. Cy #31/Rec’d, July, 1903” ( USNM) . Paralectotypes: 1 1 st -instar nymph, 1 embryo (one slide), “ Icerya / rileyi v. larreae / Ckll. / On Larrea (Wild) / Cerro Chilicote plains,/ Chihuahua, Mexico /T. + B. Cy. #31/Rec’d., July, 1903” ( USNM) ; dozens of body parts of 1 st -instar nymphs (one slide), “ I. rileyi v. larreae / Ckll. / on Larrea TYPE/ Plains base/Cerro Chilicote./Chi. Mex/(Towns.)” ( USNM) ; 3 ad ♀♀ ( BMNH) ; dry material ( USNM).

Taxonomic notes. Refer to the taxonomic notes for C. littoralis and the C. rileyi group for a discussion of similar species. The lectotype slide of I. rileyi is labelled ‘Type’.

Cockerell (1895: 15) described the subgenus Proticerya and I. rileyi in the same paper. He designated I. rileyi as the type species of the subgenus, but he named the species Icerya rileyi in the description and not Icerya (Proticerya) rileyi . The specific epithet is listed under the subgenus Proticerya in Cockerell’s checklist of the Coccidae (1896a) , but he did not refer in print to the species as Icerya (Proticerya) rileyi until later that year ( Cockerell, 1896b: 202).

Townsend first collected material of Icerya rileyi in 1891 and 1892, but did not describe it because he seemed to believe that C.V. Riley was planning to do it ( Townsend, 1892: 15). Unfortunately, before he was able to describe it, Riley was killed in a bicycle accident in September of 1895 ( Mallis, 1971). Cockerell described I. rileyi three months later and stated that it “was to have been described by Dr. Riley had he lived” (1895: 15).

Cockerell and Parrott (1899: 283) discussed the possibility of splitting this species into two species based on the host (mesquite or larrea), but found no differences in the shape of the legs and antennae of the adult females. Later, however, Cockerell created a subspecies, I. rileyi larreae ( Cockerell, 1902b: 82) .