Heterobrevennia Kaydan

Kaydan, Bora, 2011, Revision of Heterococcopsis Borchsenius (Hemiptera: Coccoidea: Pseudococcidae), with description of a new genus with two new species from Turkey, Zootaxa 2970, pp. 49-62 : 53-54

Heterobrevennia Kaydan , gen. nov.

Type species: Heterobrevennia opertus (Borchsenius, 1949 )

Generic diagnosis. Adult female: Body elongate, 2.82–3.20 mm long, 1.56–2.20 mm wide. Antennae generally 8 or 9 segmented (but occasionally 7 when 2nd and 3rd segments fused). Eyes present on margin. Labium 3 segmented. Posterior spiracles slightly larger than anterior spiracles. Legs well developed, with translucent pores on hind femur and tibia; claw with a denticle; tarsal digitules setose, claw digitules capitate, broader than tarsal digitules. Both anterior and posterior ostioles well developed. Multilocular disc pores limited to margins of both body surfaces and to posterior abdominal segments. Quinquelocular pores smaller than multilocular pores, scattered over both body surfaces. Trilocular pores present on dorsum. Oral-collar tubular ducts elongate, generally situated on body margin. Anal ring with 6 setae.

Dorsum. Cerarii numbering always 5 or more pairs, situated on posterior abdominal segments and on head. Dorsal body setae spine-like. Multilocular pores situated on body margin. Quinquelocular pores scattered throughout. Trilocular pores scattered throughout, sometimes few, but always present at least on cerarii, ostioles and near spiracle opening. Minute discoidal pores scattered throughout. Oral-collar tubular ducts elongate scattered throughout.

Venter. Body setae slender, longest setae present medially on head; apical setae long; spine-like setae present submarginally on body. Multilocular disc pores present on posterior abdominal segments and on margin of thorax and head. Quinquelocular pores scattered over body. Trilocular pores present around atrium of spiracle, absent elsewhere. Minute discoidal pores scattered over body. Oral-collar tubular ducts in rows on posterior abdominal segment and scattered on thorax and head.

Comment. Heterobrevennia gen. nov. is most similar to Heterococcopsis in having trilocular pores on the dorsum and 8- or 9-segmented antennae. The two genera differ as follows (features of Heterococcopsis in parentheses): i) no circuli (with 3 circuli), ii) trilocular pores scattered on dorsum (trilocular pores on dorsum restricted to cerarii, ostioles and posterior abdominal segments), iii) at least five cerarii, of which 3 are present on head (only 2 cerarii, restricted to posterior abdominal segments), and iv) legs slender (legs stout).

Heterobrevennia is also similar to all the other genera in the Heterococcus -group. The affinities of Heterobrevennia with other related genera are discussed below.

Asphodelococcus can be readily separated from Heterobrevennia by the following combination of features (features of Heterobrevennia in parenthesis): (i) antennae 6 segmented (antennae 9 segmented), (ii) multilocular pores of unusual shape and often quadrate, and with heavily sclerotised hexagonal pores (pores normal), and (iii) cerarii numbering 4 pairs and restricted to abdomen (cerarii numbering 5 or more pairs, present on both abdomen and head).

Annulococcus differs from Heterobrevennia in the following combination of features (features of Heterobrevennia in parenthesis): (i) cerarii poorly developed, present along the body margin (cerarii numbering 5 or more pairs, present on both abdomen and head), (ii) quinquelocular pores larger than other multilocular pores (quinquelocular pores smaller than other multilocular pores), (iii) oral-collar tubular ducts very short and stout (oral-collar tubular ducts elongate), and (iv) trilocular pores absent (trilocular pores present) ( Miller, 1975; Foldi and Cox, 1989).

Brevennia Goux shares many morphological features with Heterobrevennia , namely, the presence of trilocular pores on the dorsum and venter and the abundance of quinquelocular pores on both dorsum and venter, but the two genera differ in the absence of claw denticles and Brevennia also lacks anterior ostioles.

Boreococcus Danzig , Heterococcus Borchsenius and Pseudorhodania can be readily distinguished from Heterobrevennia due to the complete absence of trilocular pores in these three genera.

Laingococcus Williams differs from Heterobrevennia in having the following combination of features (features of Heterobrevennia in parenthesis): (i) ostioles absent (ostioles present), (ii) cerarii absent (5 or more cerarii present on both abdomen and head); (iii) a circulus present (absent); (iv) dorsal body setae similar in size to those on venter (dorsal body setae spinose, ventral setose); and (v) in having a rotund body (body elongate oval).

In having trilocular pores on the dorsum and venter, Heterobrevennia is somewhat similar to Paramacoccus Foldi & Cox but Paramacoccus is unique in lacking ostioles.

On the other hand, in having trilocular pores on the dorsum and venter, and spine-like setae on dorsum, Heterobrevennia is somewhat similar to Phenacoccus Cockerell but new genus differs in having many quinquelocular pores on the dorsum.

Etymology. The name Heterobrevennia refers to its similarity to the genera Heterococcus and Brevennia . Gender female.